Clrwtr SENTROL Application Notes

SENTROL

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Application Notes

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Introduction

ACOUSTIC GLASSBREAK SENSORS

Sentrol has added a number of new ShatterPro™ Acoustic Glassbreak Sensors to
its product line: Sensors that combine high detection rates with high immunity to
false alarms.

ShatterPro

ShatterPro
reliability, flexibility and ease of use. They offer a 25 foot radius range for extented
glassbreak detection. Using patented Pattern Recognition Technology
ShatterPro
of framed glass breaks. It does this by “listening” for the unique sound of glass
breaking at numerous points across the entire frequency spectrum, not just one or
two points.

ShatterPro
24 Hours a day.

Our new ShatterPro
motion-sensitive glassbreak
sensor, was introduced by
Sentrol in February 1995. It is
an acoustic glassbreak sensor
combined with a passive
infrared motion detector (PIR)
for the purpose of detecting
break-ins through glass while
eliminating occupant­generated false alarms.

Choose the right sensor.

Glassbreak sensors are an important part of an effective perimeter detection
system. An important part of your job is choosing the right sensor for a particular
application or environment. To make it easier, Sentrol offers you a variety of
choices for virtually any glassbreak application. The product comparison chart
below can help you make the decision.

™

II: The Premier Technology.

™

II acoustic glassbreak sensors give you a potent combination of range,

™

™

is designed to eliminate common false alarms and improve detection

™

Plus:

™

Plus, a

Amplitude

Frequency

, the

Glass Breaking

Pots & Pans Clanging

Doors Slamming

Pattern Recognition Technology™ is designed to eliminate
common false alarm sources and improve detection by
processing the pattern and timing relationships at points
across the entire frequency spectrum.

GLASSBREAK SENSORS

Choose the ShatterPro that’s right for you

Model Range Auto test End-user PRT* Occupied area 24-hour application/

ShatterPro II

5810A 25’ • • • •
5820A 25’ • • • •
5825 25’ • • • •
5845 Wireless 25’ • • • •

ShatterPro I

5800 Series 18’ • •

ShatterPro Plus

5885 Series 12’-15’ • • • • •

*Pattern Recognition Technology

to window verification perimeter loop Built in PIR sensor

1.2

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Introduction

GLASSBREAK SHOCK SENSORS

Millions of Sentrol shock sensors installed around the world give testimony to our
product reliability. We’ve added some new products to give you more choices at
installation time and more ways to increase your sales.

Reliable, flexible shock sensors.

Breaking glass produces specific shock frequencies which travel through glass and
window frames. When shock sensors “feel” the wave generated by breaking glass,
they signal an alarm. These sensors mount directly on the glass or the frame and
give you a product virtually immune to false alarms. That means they can operate
on windows with heavy drapes or shutters. Shock sensors also provide a visual
deterrent to intruders helping to prevent break-in attempts.

Most of Sentrol’s shock sensors are solid-state, with no mechanical parts to wear
out or fail. We incorporate a piezo transducer specifically tuned to the shock

Sentrol shock
sensors use a piezo
transducer
specifically tuned to
the shock frequency
of glass breaking.

frequency of glass breaking, providing both excellent detection and false alarm
immunity.

Choose the right sensor.

To choose the right shock sensor for a particular application or environment,
see the product comparison chart below.

Choose the Shock Sensor that’s right for you.

GLASSBREAK SENSORS

Shock Sensors

Model Coverage Mounting Powered Indicating Reed

5115/20 7’ Glass Self No No
5125 10’ Glass Self Yes No
5135 20’ Glass Wired Yes No

5414 10’ Glass or Frame Self Yes No
5415A 10’ Glass or Frame Self Yes Yes

5425 10’ Glass or Frame Wired Yes No
5428 10’ Glass or Frame Wired Yes Yes

Specialty Shock Sensors

GS600 Varies Glass, Frame, Wired Yes Yes

5422 2’x4’x1’ Metal Enclosure Wired Yes No

Site LED Switch

Wall, or Roof

1.3

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Residential & Commercial Applications

INSTALLING ACOUSTIC GLASSBREAK SENSORS
IN PRE-WIRE APPLICATIONS

APPLICATION

New construction applications offer the opportunity to pre-wire an acoustic
glassbreak sensor, creating an attractive, unobtrusive installation.

Sentrol’s ShatterPro II can be used in a pre-wire by using the single gang box kit
(5828) or the trim ring. The pre-wire trim ring is almost unnoticeable in pre-wire
installations. Its 2-1/2 in. (6.35 cm) diameter size is almost one third smaller than a
single gang box plate.

GLASSBREAK SENSORS

INSTALLATION

RECOMMENDED
PRODUCTS

USING THE TRIM RING

To pre-wire a Recessed ShatterPro, attach a 1 in. (2.54 cm) inside diameter pipe
about 2 1/2" (6.5 cm) long to a stud, in the desired location for the sensor, allowing
the pipe to protrude approximately 3/8 in. (.95 cm) beyond the stud. Run sensor
cable through the pipe. Don’t forget to leave enough slack to pull the wire out
later. (This shows the drywall installer that a security sensor is to be placed in this
location. The drywall installer will then cut a hole through the sheet rock for
the pipe.)

After the drywall is in place, the Recessed ShatterPro II can be inserted into
the pipe. After wiring, insert the 1 in. sleeve into the pipe, and the sensor into
the sleeve. Use the trim ring, if necessary, to cover any irregularities in the
drywall hole.

USING THE SINGLE GANG BOX KIT

This kit includes a plastic front plate, metal plate for alignment and painted
finishing screws.

The 5820A Recessed ShatterPro II acoustic glassbreak sensor, and the 5829 Trim
Ring and 5828 Single Gang Box Kit.

1" I. D. x 2 1/2" long

1.4

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Residential & Commercial Applications

INSTALLING RECESSED GLASSBREAK SENSORS
WHEN APPEARANCE IS IMPORTANT

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Some customers want their security system to be as inconspicuous as possible.
This is especially true in most residential installations, office entry foyers,
executive offices, and upscale retail stores.

Sentrol’s Recessed ShatterPro II and the Sentrol ShatterSwitch are the least
obtrusive acoustic glass break sensors available.

The Recessed ShatterPro II acoustic sensor recess mounts in a 1 in. (2.54 cm) hole.
See installation instructions on previous page for pre-wired installations.

When installing the Recessed ShatterPro II in existing residences and commercial
facilities, drill a 1 in. hole through the drywall or ceiling tile, in the desired
location. Insert the 1 in. sleeve into the hole, and the sensor into the sleeve. Use
the trim ring, if necessary, to cover any irregularities in the drywall hole. (A hole
saw makes the neatest hole, but a spade bit with cutting tips will usually work also.
A twist drill should be avoided because it tends to tear the sheet rock covering.)

One sensor can protect an entire room. Sensor range is 25 ft. (7.62 m) to the
bottom of the glass in a 360˚ pattern, so the sensor can be ceiling mounted,
mounted on the opposite wall, or on an adjoining wall. When installed, the
Recessed ShatterPro II is little larger than a quarter, and is therefore rarely noticed.

The Sentrol ShatterSwitch is a shorter range sensor which protects up to 10 ft.
(3.05 m) of glass. For a hidden appearance, mount the ShatterSwitch on the
window frame behind curtains or blinds.

For protecting a large glass area, use a 5820A Recessed ShatterPro II. For smaller
areas of glass, a ShatterSwitch 5725T can be used. A ShatterSwitch 5728T with
built in reed switch will also detect the opening of the door or window. An optional
90˚ mounting bracket, part number 5702, may be helpful when mounting the
ShatterSwitch on a narrow window frame.

GLASSBREAK SENSORS

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Residential & Commercial Applications

PROTECTING BATHROOM WINDOWS

GLASSBREAK SENSORS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

In residential installations, bathroom windows may have to be protected as part of
a complete perimeter system. Bathrooms are challenging environments for glass
break sensors for two reasons. 1) Humidity can be very high when a shower or tub
is used. 2) Bathrooms are acoustically live rooms — they are typically small, with
bare floors and many sound-reflecting surfaces. Acoustically live rooms have a
greater potential for false alarms when acoustic glassbreak sensors are used.

Humidity can also be a problem for most glassbreak sensors. Sentrol offers a
hermetically sealed shock sensor, the GS610, that works with a separate analyser,
the GS614. Shock sensors have fewer problems than acoustic sensors in high
humidity environments.

Since shock sensors are not “listening,” they are the preferred choice for
acoustically live rooms, such as bathrooms. For best false alarm immunity in
bathrooms, if possible use a hermetically sealed shock sensor mounted on the glass
or a frame mounted shock sensor.

If an acoustic sensor is to be used, select a sensor with range comparable to the
size of the room. In a 10 ft. (3.05 m) bathroom, for example, it is better to use a
sensor with a 10 ft. range than a 25 ft. (7.5 m) range. The 25 ft. sensor is too “hot”
for such a small, acoustically-live room, and would be vulnerable to false alarms.

The GS610 shock sensor, with 12 ft. (4 m) of range, provides excellent false alarm
immunity and humidity tolerance. The GS611 frame mounted shock sensor with
built-in reed switch can protect windows that open. Both sensors work in
conjunction with the GS614 analyser.

The 5810A-W4 reduced sensitivity ShatterPro™ II with advanced Pattern
Recognition Technology™ can also be used in some bathroom applications.

1.6

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Residential & Commercial Applications

PROTECTING SKYLIGHTS

GLASSBREAK SENSORS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Skylights can be a vulnerable entry point to many homes and businesses. Many
skylights are made of Plexiglas™, Lexan™, or other type of plastic. This
eliminates the option of using acoustic glassbreak sensors since they are designed
for detecting breaking glass, not plastic.

For protecting plastic skylights, mount a shock sensor in a corner of the skylight
1 in. (2.54 cm) from the frame.

Note: The plastic material in the skylight will absorb much of the shock energy
from a break. The range of a shock sensor on plastic is typically 50% less than the
range on glass. A shock sensor with a 7 ft. (2.13 m) range on glass would generally
have a 3-1/2 ft. (1.07 m) range on a plastic skylight.

When protecting plastic skylights, it is essential to thoroughly test the sensor by
rapping the far opposite corner of the skylight with the handle of an 8"-10"
screwdriver. If the sensor trips to the rap test, its range is sufficient to detect an
actual break-in.

An acoustic glassbreak sensor can be used for glass skylights. The sensor can be
mounted on any wall within range of the skylights, or on the ceiling.

Use a Sentrol 5115/20 shock sensor for plastic skylights if 3-1/2 ft. (1.07 m) of
range is sufficient, or use two sensors mounted in opposite corners if additional
range is required.

For glass skylights, another option is a 5725T ShatterSwitch, if it can be mounted
within range.

1.7

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Residential & Commercial Applications

PROTECTING ROOMS WITH
CURTAINS AND BLINDS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Many homes and offices have curtains or blinds on at least some of the windows.
Sentrol shock sensors provide glass break detection regardless of the type of
window coverings present. With proper placement, Sentrol’s acoustic sensors may
also be used when blinds and light drapes are present.

Glass mounted or frame mounted shock sensors are unaffected by curtains and
blinds. The sensor should be mounted in the corner of the glass, 1 in. (2.54 cm)
from the frame.

Sentrol’s acoustic ShatterSwitch mounts behind curtains or blinds, and can protect
multiple windows. Mount the ShatterSwitch on the window frame to protect one
or more windows. It will protect a 10 ft (3.05 m) area. However, its range can be
reduced if window coverings are touching the glass.

Sentrol’s acoustic ShatterPro II can be mounted anywhere in a room except on the
frame (as long as the glass to be protected is within its range), and can detect
breaking glass when blinds and light drapes are present. Mount the ShatterPro II
on the ceiling, on an adjoining wall, or on a wall opposite from the glass to be
protected. Mounting the ShatterPro on the same wall as the glass should be
avoided because the signal may be dampened before it bounces back to
the sensor.

Test the range with the 5709C tester held behind the closed curtains or drapes. If
the sensor does not trip, it will be necessary to relocate the sensor closer to the
protected glass, or use additional sensors.

For shock sensor protection, use a 5115/20 or a 5425 shock sensor. For acoustic
glassbreak detection, use a ShatterSwitch 5725T. Or, use a 5728T ShatterSwitch
with built-in reed switch to also detect forced opening of the door or window. For a
larger range, use the ShatterPro II 5810A or the Recessed ShatterPro II 5820A.

GLASSBREAK SENSORS

1.8

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Residential & Commercial Applications

PROTECTING LARGE ROOMS WITH
MULTIPLE WINDOWS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Most large rooms have several windows, often widely spaced from each other.
The most economical way to protect large rooms with multiple windows is with a
single, long range acoustic sensor. However, care should still be taken to match
sensor range to room size. A sensor whose range extends well beyond the
boundaries of the room is acoustically “hot” and vulnerable to false alarms.

For protecting glass on more than one wall, ceiling mounting is most desirable.
Make sure that all protected glass is within the radius coverage of the sensor. For
any glass to be protected by an acoustic sensor, the distance from the bottom of
the window to the sensor must be no more than the sensor’s maximum range.

For protecting one wall of glass, mounting an acoustic sensor on the opposite wall
is best (if all the glass to be protected is within the sensor’s range).

Always confirm range with a Sentrol 5709C hand-held tester.
For glass areas less than 10 ft. (3.05 m) or behind heavy curtains use a Sentrol

5725T ShatterSwitch mounted on the frame. For protecting large glass areas, a
single 5810A ShatterPro II, with its 25 ft. (7.6 m) range, can protect up to four walls
of glass. The 5820A Recessed ShatterPro II mounts in a 1 in. (2.54 cm) hole in the
ceiling, opposite wall or adjacent walls.

GLASSBREAK SENSORS

, Temp wired, Lam

25' (7.5 m) Plate

25' (7.5m) Plate, Temp wired, Lam

1.9

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Residential & Commercial Applications

PROTECTING SMALL ROOMS WITH GLASS

GLASSBREAK SENSORS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

False alarms are more likely in small, acoustically live rooms such as small
kitchens, glass entry airlocks, stairwells, small glass offices, and utility rooms. For
best false alarm immunity the range of the sensor should be matched to the size of
the room and glass area to be protected.

Shock sensors offer the best false alarm immunity in acoustically live rooms, and
are the most economical if there is only one window to protect. Acoustic sensors
will provide good false alarm immunity if selected properly.

If it can be avoided, do not install acoustic sensors with large range into small
rooms. A sensor with 25 ft. (7.5 m) diameter range into a 10 ft. (3.05 m) room
increases the risk of false alarm. Choose an acoustic sensor with range comparable
to the size of glass to be protected.

In a small room with just one window, the Sentrol 5115/20 shock sensor provides
economical protection and false alarm free operation in virtually all acoustically
live applications. The 5414 or 5415A frame mount shock sensors are also a good
choice. The 5415A has a built-in reed switch to protect windows that open.

For multiple windows the 5725T (ShatterSwitch) or the 5810A-W4 reduced
sensitivity (ShatterPro II) can be considered for small rooms.

Verify correct sensor placement with the Sentrol 5709C hand-held tester.
To protect just one window, use the 5115/20 shock sensor. For protecting multiple

windows in a small room, use a 5810A-W4 reduced sensitivity ShatterPro II or
multiple shock sensors. The 5415A or 5426 frame mount shock sensors with built­in reed switches can be used to protect windows that open.

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Residential & Commercial Applications

PROTECTING OCCUPIED AREAS

GLASSBREAK SENSORS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Glassbreak sensors can be armed while rooms are occupied to alert the family
inside a home or the employee working late or on the weekend.

Occupied area protection means sensors are armed when the perimeter loop of the
system is armed. In contrast to 24-hour loops, which are armed continuously, all
day and all night, a perimeter loop containing glassbreak sensors is armed only
when the magnetic contacts on doors are armed — generally, after hours, when
buildings are quieter.

Today’s advanced acoustic sensors provide excellent false alarm immunity in
occupied areas if installed on the perimeter loop. Sentrol shock sensors and the
ShatterPro™ Plus 5885 provide 24-hour loop protection without false alarms.

For 24-hour loop protection, mount Sentrol’s 5115/20 shock sensors on the glass to
be protected, 1 in. (2.54 cm) from the corner.

Frame mounted shock sensors such as the 5425 will also provide 24 hour loop
protection without false alarms if sensitivity is set properly. Sentrol also offers a
motion sensitive acoustic glassbreak product, the 5885, for use in 24 hour
applications (see page 24).

For perimeter protection using acoustic sensors, use a ShatterSwitch for protecting
glass areas smaller than 10 ft. (3.05 m). Use Sentrol’s advanced ShatterPro II to
protect large glass areas on the perimeter loop.

To test shock sensors, rap the protected glass with the handle of a screwdriver in
the corner farthest from the sensor. This should trip the sensor. Verify range
coverage of acoustic sensors with the Sentrol 5709C hand-held tester.

For shock sensor protection, the 5115/20 provides the best false alarm immunity
with the 5425 also a good solution. The ShatterSwitch 5725T, the ShatterPro II
5810A, and the Recessed ShatterPro II 5820A provide excellent false alarm
immunity in occupied areas on the perimeter loop. The ShatterPro Plus 5885 is
also recommended for 24 hour acoustic glassbreak coverage.

1.11

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Residential & Commercial Applications

PROTECTING A SINGLE WINDOW WITH
WIRELESS COMPATIBLE SENSORS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

A wireless compatible shock sensor can be used for economical protection of rooms
with a single window. For glass doors or windows which open, use a wireless
compatible sensor with a built-in reed switch.

Sentrol’s 5115/20 wireless compatible shock sensor is a two-wire device which
draws no power, and therefore has no impact on the transmitter’s battery life.
Mount the 5115/20 on the glass, 1 in. (2.54 cm) from the corner. Range is 7 ft.
(2.13 m) radius out from the sensor.

The 5414 or 5415A frame mounted shock sensor can protect two fixed windows in
the same window opening. An internal lithium battery powers the sensor for up to
15 years, so there is no draw on the transmitter battery. Range for the 5414 or
5415A is up to 10 ft. (3.05 m). Frame mounting affects sensor range, so it is
essential to test the sensor by rapping the glass on the side opposite the sensor.
The sensor must trip to the rap test to ensure proper operation. The 5415A
includes a built-in reed switch and a magnet to protect against opening the
window.

For protecting glass doors or windows that open, mount a Wireless ShatterSwitch
acoustic sensor within the window bay. The ShatterSwitch will protect a 10 ft.
(3.05 m) area of glass. Test the sensor’s range using the Sentrol 5709C hand-held
tester.

Note: The Wireless ShatterSwitch shares the battery of the transmitter. Its current
draw of up to 15 micro amps may reduce transmitter battery life by up to 50%.
Since other devices are likely to need battery replacement before the
ShatterSwitch, this is rarely a problem.

Use the Sentrol self-powered 5115/20 for glass-mounted applications, or the
lithium battery powered 5414 shock sensor for frame mounting. Use the 5415A
shock sensor with built-in reed switch to protect windows that open.

For acoustic sensor protection use the Wireless ShatterSwitch 5741. Use the 5742
Wireless ShatterSwitch with built-in reed switch to protect glass doors and
windows that open.

GLASSBREAK SENSORS

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Residential & Commercial Applications

PROTECTING MULTIPLE WINDOWS WITH
WIRELESS COMPATIBLE SENSORS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

In many installations it is desirable to protect rooms with several windows. This
can be accomplished economically using one transmitter and a wireless compatible
acoustic sensor.

Sentrol’s Wireless ShatterPro acoustic glassbreak sensor combines excellent false
alarm immunity and consistent detection with wireless compatibility. The Wireless
ShatterPro has a coverage radius of 20 ft. (6.1 m), [40 ft. (12.2 m) diameter] if
ceiling mounted. A single sensor, therefore, can typically protect an entire room.

Mount the transmitter inside the back box of the Wireless ShatterPro 5845, which
hides the transmitter and provides an integrated look. If desired, the transmitter
can also be mounted next the sensor module on the bracket included.

Note: The sensor shares the transmitter battery, which may reduce battery life by
up to 50%. Since other devices are likely to need battery replacement before the
Wireless ShatterPro, this is rarely a problem.

Position the Wireless ShatterPro anywhere in the room except within the frame.
The best location for detection is directly opposite the glass. Since wireless sensor
placement is not determined by wire routing, opposite wall mounting is a more
practical option than with hard wire installations.

Verify sensor range and placement with the 5709C hand-held tester.
For glass areas smaller than 10 sq. ft. (3 sq. m) use the Sentrol’s Wireless

ShatterSwitch 5741. For forced open protection as well, use the 5742 with built-in
reed switch. For glass areas larger than 10 sq. ft., or for an integrated appearance,
use the Wireless ShatterPro 5845.

GLASSBREAK SENSORS

1.13

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Residential & Commercial Applications

PROTECTING SMALL WINDOWS,
FRENCH DOOR GLASS, FRENCH WINDOWS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Small French door type windows are common in older homes. The glass panels are
typically 6 in. x 9 in. (15.2 cm x 22.9 cm) or larger. Small windows have unique
properties when they break. First, the sound output may be low since there is not
much glass to break. Second, the glass may just pop out of the frame when hit,
rather than breaking. This is particularly true of glass in old wooden frames.
Detection in both cases can be difficult.

Modern French-type windows are usually two large panes of glass with false
dividers between them. The dividers have little effect from a detection
standpoint. Detection of false French windows is the same as with standard size
windows, and no special precautions need to be taken.

The 5725T ShatterSwitch provides good protection of small windows if installed
within 4 ft. of the glass to be protected. Most acoustic sensors are only rated down
to a minimum glass size of 1 ft. x 1 ft. (30.5 cm x 30.5 cm) or larger. If protecting a
smaller window than the sensor’s minimum rated size, the capture rate will
decrease by as much as 50%. The customer should be informed that sensor detection has
been compromised. With small windows, it is best to locate the acoustic sensor close
to the protected glass.

More consistent detection can be achieved using a frame mounted shock sensor.
Often several sensors will be needed to protect a frame of several windows. Take
particular care to thoroughly test sensor range by rapping on the windows farthest
from the sensor. The sensor must trip to the rap test. Use additional sensors on
each side of the glass until a rap to any pane of glass will trip at least one shock
sensor.

For acoustic protection of smaller windows, use a ShatterPro II 5810A or 5820A.
The ShatterPro™ II is not recommended for windows smaller than 1 ft. x 1 ft.
(30.5 cm x 30.5 cm). The 5725T ShatterSwitch can be used if mounted within 4 ft.
of the protected glass.

The 5425 shock sensor can be mounted on the frame to protect multiple panes of
small glass. Several sensors may be required.

GLASSBREAK SENSORS

1.14

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Residential & Commercial Applications

PROTECTING GLASS DOORS AND
WINDOWS THAT OPEN

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Protecting glass doors and windows that open can be a challenge because of the
difficulty of running wires from the glass to the frame. Glassbreak and forced-open
protection can, however, be achieved with a single detector.

For shock sensor protection, both on-the-glass and frame-mounted sensors can be
used. The 5120C shock sensor ships with 3 ft. (.91 m) of coil cord. The sensor
mounts in a corner on the glass, and the coil cord reaches to a termination on the
frame. As the window or door opens, the coil cord stretches as needed.

Frame-mounted shock sensor models are available which also have a built-in reed
switch with magnet. These sensors provide both glass break detection as well as
forced open detection. Mount the sensor’s magnet on the door or moveable
window, and mount the sensor on the frame as close as possible to the magnet.

For acoustic sensor protection use a Sentrol ShatterSwitch with built-in reed
switch and magnet. This provides coverage of 10 ft. (3.05 m) of glass, including
multiple windows, while detecting forced opening as well. The ShatterSwitch
should be centered at the top of the glass, or as near to center as practical for
magnet location.

Use a 5120C shock sensor with coil cord for on-the-glass protection. The 5426
frame-mount shock sensor with built-in reed switch provides double protection.

The ShatterSwitch is available in standard configuration, part number 5725T, and
also with built-in reed switch, part number 5728T. A 90˚ mounting bracket, part
number 5702, is useful on narrow frames.

GLASSBREAK SENSORS

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Residential & Commercial Applications

PROTECTING INSULATED GLASS

GLASSBREAK SENSORS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Many modern buildings use windows that contain two panes of glass divided by an
air space for added insulation. This insulated glass can be protected by shock and
acoustic glassbreak sensors. As long as the inside pane of glass breaks, the sensor
will detect the break. It is possible to break the outside pane of glass without
setting off an alarm.

Installation for thermopane windows is the same as for other windows. Shock
sensors should be mounted in the corner or frame mounted. Acoustic sensors
should be mounted so that the protected glass is within range.

Rap test the shock sensors. Test acoustic sensors with the Sentrol 5709C hand­held tester.

Use a 5115/20 shock sensor for on-the-glass protection. The 5426 frame-mount
shock sensor with built-in reed switch provides double protection for windows
which open.

Use the 5725T ShatterSwitch, 5728T with built-in reed switch, or 5810A
ShatterPro II for acoustic protection.

1.16

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Commercial Applications

PROTECTING STOREFRONT GLASS

GLASSBREAK SENSORS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Merchants often want glass break protection on their front windows, in order to
have the alarm sound as soon as the glass breaks. While this does not prevent
“smash and grab” losses, it will prevent most burglars from actually entering
the building.

For storefront windows shock sensors are always the best choice. A shock sensor is
visible from the outside, which might deter burglars before the glass is broken.
And shock sensors are less likely to be set off by street noise, or by rolling metal
shutters, than are acoustic sensors. Due to range limitations, however, shock
sensors can be more expensive to install. Multiple sensors may be required to
cover the same glass area that one acoustic sensor can protect.

Acoustic sensors can be successfully used to protect storefront glass if store
personnel are properly trained to not block the glass. Acoustic sensors must be able
to “see” all the glass that they are protecting. If a sensor’s line of sight to the glass
is blocked by store displays or furniture, the sensor is unlikely to detect a break-in
through the blocked glass.

If selecting an acoustic sensor, in stores which do not have window displays, mount
a ShatterPro in the ceiling inside the room. For stores with window displays,
mount a ShatterSwitch directly above the glass.

Use the 5115/20 for on-the-glass shock sensor protection, or use the 5425 for
frame mounting.

For acoustic sensor protection, use a ShatterPro II 5810A, a Recessed ShatterPro
5820A, or a ShatterSwitch 5725T.

New Models Are Here

1.17

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Commercial Applications

PROTECTING STORE WINDOWS
WITH ROLL-UP METAL SHUTTERS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Retail shops in high crime areas will often have roll-up metal shutters to protect
the glass windows at night. The clanging and banging sounds of these shutters can
cause acoustic sensors to false alarm. False alarms can also be caused by people
rattling the shutters, and by other vibrations.

For windows with roll-up shutters, shock sensors provide the best false alarm
immunity. On-the-glass shock sensors have better false alarm immunity than
frame-mounted shock sensors, and are therefore the preferred choice. On-the-glass
sensors are also easily visible from the outside, which may help deter a break-in.

If using acoustic sensors, use only an advanced sensor with excellent false alarm
immunity. Mount the sensor back into the room, away from street and roll-up
shutter sounds. An advanced sensor mounted 15 ft. back from the glass should
provide false-alarm-free operation in most applications.

Use the 5115/20 for on-the-glass shock sensor protection, or use the 5425 for
frame mounting.

Use a ShatterPro II 5810A, or a Recessed ShatterPro II 5820A, for acoustic
sensor protection.

GLASSBREAK SENSORS

1.18

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Commercial Applications

PROTECTING DISPLAY AND JEWELRY CASES

GLASSBREAK SENSORS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Museum curators and retailers with glass display and jewelry cases often want the
extra protection of glassbreak sensors inside their cases. Both shock sensors and
acoustic sensors are options for such protection.

Note: Acoustic glassbreak sensors sealed within a glass box are extremely “live,”
and are vulnerable to false alarms if the case is accidentally struck by keys or other
metal objects. For this reason, acoustic sensors are appropriate only if the sensor
will be armed while the premises are not occupied.

For occupied or 24-hour protection of display cases, it is best to use shock sensors.
A frame mounted shock sensor will provide the most economical protection if
there is more than one piece of glass to protect. To prevent sensor tampering, the
glassbreak sensors must be placed inside the case.

Test the installation by rapping the protected glass farthest away from the sensors.
If the shock sensor does not trip to this rap test, it may not trip to an actual break.
Add additional sensors until at least one sensor trips on each rap test.

Note: An actual glass break generates twice as much energy to the shock sensor as
a rap test.

More than one shock sensor may be needed to protect all the glass in a display
case. If, for cosmetic reasons, this is not a viable solution, a single acoustic sensor
may be used. To protect a glass case when a room is not occupied, use an acoustic
sensor with limited range, such as the Sentrol ShatterSwitch , with its 10 ft.
(3.05 m) range. The ShatterPro II is not recommended for display cases because it
is not designed to detect the prying of the case tops.

For acoustic sensor protection, the ShatterSwitch 5725T by Sentrol will generally
protect an entire case. A 5728T with built-in reed switch can be used to detect
forced opening of the access door.

The 5115/20 shock sensor mounts directly onto the glass, and is the best choice if
only one piece of glass is to be protected. For protecting multiple glass walls in the
case, use one or more 5425 shock sensors. Use a 5426 with built-in reed switch to
detect the forced opening of the access door.

L
O
R
T
N
E
S

L
O
R
T
N
E
S

1.19

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Commercial Applications

PROTECTING METAL ENCLOSURES

GLASSBREAK SENSORS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Sentrol’s 5402 shock sensor eliminates the need for costly lined boxes or
placement of security system controls in a vault for UL mercantile applications.
The sensor mounts inside the enclosure on the hinge side of the box for best
response.

Locate the sensor inside the enclosure on the side wall on or near the hinge. If the
hinge runs the length of the side, center the sensor vertically. If the enclosure has
multiple hinges, place the sensor next to the hinge nearest the middle of the
enclosure.

Peel back paper from one side of adhesive tape pad and press it onto back of
sensor. The tape pad must be flat against the plastic case. Use a 50/50 solution of
isopropyl alcohol to clean the mounting area. Dry the mounting area. Peel off the
backing paper from the tape pad and press the sensor against the metal. The tape
will fully adhere within 24 hours.

Wire the sensor to the loop according to wiring instructions.
To test the sensor, view the LED or see if the panel detects the alarm. Then using

the metal shaft of a medium-size screwdriver, lightly scrape back and forth against
the edge of the metal enclosure farthest from the sensor.

If the 5402 does not respond, a second sensor may be required.
Note: The 5402 has an estimated 15 year battery life. Test the sensor biannually

to ensure proper operation. The 5422 is a 4 wire sensor using external power.
5402, 5422

Sensor

Screwdriver

1.20

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Commercial Applications

PROTECTING THICK GLASS

GLASSBREAK SENSORS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Acoustic sensors and shock sensors are rated for glass thicknesses up to 1/4 in.
(6.4 mm). Some installations may have glass thicker than 1/4 in., yet the customer
still wants glass break detection.

The 5725T ShatterSwitch can be used to protect thicker glass with some reduction
in range. The ShatterPro II is not designed to protect thicker glass. Its
effectiveness will be reduced if protecting thick glass. If ShatterPro II acoustic

sensors are used, the end-user should be warned that capture rate is reduced as much
as 50%.

Shock sensors may be used on thick glass if they are thoroughly tested. Thick
glass absorbs much of the shock energy from a break, and therefore is more of a
challenge for glass break detection.

For on-the-glass shock sensors, mount the sensor in a corner of the glass
approximately 1 in. (2.54 cm) in from the corner. Test the sensor by rapping the far
opposite corner of the glass with a screwdriver handle. The sensor must trip to this
rap test. If the sensor fails to trip, mount additional sensors in the other corners
until at least one sensor trips to rapping the glass at every point on the window.

Frame mounted shock sensors are tested in the same manner. Sensors such as the
5425 have a sensitivity adjustment to increase range of the sensor if needed. For
best false alarm immunity, set sensitivity no higher than half-way. Use additional
sensors as needed.

For shock sensor protection use the 5115/20 mounted on the glass, or the 5425
mounted on the frame. The 5426 shock sensor also has a built-in reed switch with
magnet for detecting forced opening of a door or window. For acoustic sensor
protection, use the 5725T ShatterSwitch and mount within six feet of the farthest
point of the protected glass.

1.21

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Commercial Applications

PROTECTING WINDOWS WITH FILM

GLASSBREAK SENSORS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

In sunny climates some commercial windows will have a tinting film attached to
the glass.

Sometimes, commercial windows also have a plastic film attached to the glass to
prevent shattering from impacts or bullets. This “armor-coated” glass can be found
in bank drive-up windows, in some retail stores, and in other vulnerable buildings.

Acoustic sensor range is not effected by tinting film, so any acoustic sensor can be
used.

Shock sensors are also unaffected by tinting film. For on-the-glass sensors, cut
away the film where the sensor will be placed so that the mounting tape is affixed
to the glass itself and not to the film.

Armor-coating will reduce acoustic sensor range by about 50%. This is particularly
true if the armor-coating is applied to laminated glass. If protecting armor-coated
glass, mount the acoustic sensor 50% closer than the specified range, and confirm
coverage with the hand-held tester. Additional sensors may be needed since the
sensors are mounted closer to the glass.

Armor-coated glass will also reduce shock sensor range. When using shock sensors,
thoroughly test the installation by rapping the glass in the far opposite corner of
the glass from the sensor. If the sensor does not trip to the rap test, add additional
sensors at other corners of the window until at least one sensor trips to a rap at any
place on the window.

Any Sentrol shock or acoustic sensor, as long as the installation guidelines above
are followed.

Plate, Tempered

Laminated Glass Tinted Armor Coated

Acoustic Spec. Range 100% 100% 50% or less

Shock Sensors Required 1 1 Double the sensors

1.22

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Commercial Applications

PROTECTING ROOMS WHEN CLEANING CREWS
ARE PRESENT

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Often, the perimeter loop of the security system is armed when cleaning crews are
in a building. If acoustic sensors are armed, they will be listening to all sounds,
including those made by night cleaning crews. Acoustic sensors are most likely to
false alarm to multiple sounds. The cleaning crews produce a combination of
sounds from vacuums, floor polishers, and clattering garbage cans, all of which
combine to cause false alarms for some sensors in some applications.

Shock sensors provide the best false alarm immunity for a building when it is
occupied. Shock sensors are often economically impractical, however, due to the
number of windows to be protected. Also, in applications where appearance is
important, the use of multiple shock sensors may not be an option.

Sentrol’s ShatterPro Plus 5885 provides an acoustic solution to noisy cleaning
crews. The 5885 is a motion sensitive acoustic sensor that combines a passive
infrared sensor with a glassbreak sensor. When a noisy occupant enters the field of
view of the PIR the glassbreak sensor is disabled for 70 seconds. This prevents
false alarms due to loud noises such as vacuums or floor buffers. The glassbreak
sensor is activated after the occupant leaves the field of view. The 5885 makes 24
hour acoustic applications possible.

For false alarm immunity when night cleaning crews are present, the ShatterPro
Plus 5885 will provide trouble-free performance in most applications. Other
reliable solutions are shock sensors like the 5120 or 5414.

GLASSBREAK SENSORS

1.23

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Commercial Applications

PROTECTING PLASTIC WINDOWS

GLASSBREAK SENSORS

APPLICATION

INSTALLATION

RECOMMENDED
PRODUCTS

Many windows in commercial installations are made of Plexiglas™, Lexan™, or
other types of plastic. Unfortunately, this eliminates the use of acoustic glassbreak
sensors, since they are designed to detect breaking glass, not plastic. For protecting
plastic windows, it is safest to use a shock sensor.

Note: The plastic material will absorb much of the shock energy from a break.
The range of a shock sensor on plastic is typically 50% less than the range on glass.
A shock sensor with 7 ft. (2.13 m) of range on glass would generally have 3-1/2 ft.
(1.07 m) of range on a plastic window or skylight.

If you are unsure whether the window to be protected is plastic or glass, look for
scratches. Scratches typically indicate a plastic window.

Mount the shock sensor in a corner of the window, 1in. (2.54 cm) from the frame.
Shock frequencies concentrate in the corners.

When protecting plastic windows, it is essential to thoroughly test the sensor by
rapping the far opposite corner. If the sensor trips to the rap test, the sensor range
is sufficient to detect an actual break-in.

Use a Sentrol 5115/20 shock sensor if 3-1/2 ft. (1.07 m) range is sufficient. Use two
sensors mounted in opposite corners if additional range is required.

1.24

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CHOOSING THE APPROPRIATE PIR

The following chart is intended to help you match the appropriate Sentrol PIR with your particular
installation. The charts on pages 32 and 33 list the specifications for the PIR.

SENTROL PIR RESIDENTIAL

...................................................................................................

Model 6351 35' x 35' room

Sharpshooter
DesignLine

™

™

Wall or corner mounted
90° wide angle
Pet alley, vertical barrier

...................................................................................................

Model 6255 30' x 30' room

SureShot

™

Mounts 1/8" from ceiling

Wall, corner or ceiling
Pet alley, curtain
40' single spot

...................................................................................................

Stairwell coverage

Model 6255FM Pre-wired wall or ceiling
SureShot™ Flush Mount Retro flush mount

...................................................................................................

Model 6155 45' x 45' room

Sharpshooter

™

Wall or corner mounted
Pet alley, curtain
90' long range
Extra wide angle

...................................................................................................

Model 6155CT Cold climates: garages

Sharpshooter™ CT and vacation homes

...................................................................................................

Model 6085 Garages

Sharpshooter™ Wire Cage

...................................................................................................

Model 6155XT Warm climates

Sharpshooter™ XT Unstable environments
(captures within 1˚C contrast)
(uses Quad technology)

...................................................................................................

Model 6165 Compatible with most

Wireless Sharpshooter

(back box for transmitter available)

...................................................................................................

Model 6187CTX

Industrial Sharpshooter

™

wireless systems

Same applications as 6155

™

(operates to –40˚C)
(cast metal housing)

...................................................................................................

Model 6197

Intrinsically Safe PIR

...................................................................................................

Model 6198
Nonincendive PIR

...................................................................................................

COMMERCIAL INDUSTRIAL

35' x 35' room
Wall or corner mounted
90° wide angle
Pet alley, vertical barrier
Mounts 1/8" from ceiling

30' x 30' room
Wall, corner or ceiling
Pet alley, curtain
40' single spot
Stairwell coverage

Pre-wired wall or ceiling
Retro flush mount

45' x 45' room
Wall or corner mounted
Curtain
90' long range
Extra wide angle
Single gang plate w/swivel

Cold climates Cold climates
Unheated property Unheated warehouses

Vandal protection Vandal protection
Gymnasiums

Warm climates Warm climates
Unstable environments

Compatible with most wireless systems
Same applications as 6155

Outdoors to control Outdoors to control

CCTV or local alarm CCTV or local alarm
Warehouses Food processing plants
Locker rooms Underground parking lots
Underground parking lots Dusty environments
Dusty, cold or wet areas Cold or wet areas

Hazardous areas with Hazardous areas

ignitable atmospheres for use in
Government sites Class I, II, & III
Pharmaceutical labs Division 1-2
Oil refineries Groups A, B, C, D, E, F
Grain elevators and G

Hazardous areas; for
use in Class I Division 2
Groups A, B, C, and D
(only)

Introduction

SPACE DETECTION

2.2

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Introduction

CHOOSING THE APPROPRIATE PIR

The following chart is intended to help you match the appropriate Aritech PIR with your
particular application.

ARITECH PIR RESIDENTIAL

...................................................................................................

Model AP125/AP126 33' x 40' room

(Form A)/(Form C) Corner or wall mounted
Mirror Optic Wall Mount 5 curtains at 33ft. each

...................................................................................................

Model AP425/426 50' x 65' room

(Form A)/(Form C) Corner or wall mounted
Mirror Optic Wall Mount 7 curtains at 50ft. each

...................................................................................................

Model PR361/PR363 50' diameter-360° coverage

(Form A)/(Form C) Ceiling mount - low profile
Ceiling Mount 9 curtains at 25ft. each

...................................................................................................

Model PR569 (Form C)

Commercial Ceiling Mount

...................................................................................................

Model PR633/643

200 ft Long Range
80 ft Wide Angle

...................................................................................................

Range can be reduced to 20ft.
Mounting height 6'-10'

Mirror mask allows

coverage patterns

Mounting height 6'-10'

Mounting height 7'-12'

COMMERCIAL INDUSTRIAL

33' x 40' room
Corner or wall mounted
5 curtains at 33ft. each
Range can be reduced to 20ft.
Mounting height 6'-10'

50' x 65' room
Corner or wall mounted
7 curtains at 50ft. each
Mirror mask allows

coverage patterns
Mounting height 6'-10'

50' diameter-360° coverage
Ceiling mount - low profile
9 curtains at 25 ft. each
Mounting height 7'-12'

60' diameter-360° coverage 60' diameter-360°coverage
Ceiling Mount Ind./Comm. Ceiling Mount Ind./Comm.
12 curtains at 30 ft. each 12 curtains at 30ft. each
Mounting height 7'-15' Mounting height 7'-15'
Coverage patterns: Coverage patterns:

- Full 360° - Full 360°

- 90° Curtain - 90° Curtain

- ”L“ Turn Pattern - ”L“ Turn Pattern

- Corridor Intersection - Corridor Intersection

200' Long Range 200' Long Range
80' Wide Angle 80' Wide Angle
Wall Mount Wall Mount
12 selectable coverage 12 selectable coverage

patterns patterns
Mounting height 6'-10' Mounting height 6'-10'

SPACE DETECTION

2.3

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Introduction

SPECIFICATIONS

6150 6150XT 6160 6170

Series Series Series Series

Electrical

Voltage

3 Volt & 9 Volt Wireless

7 to 16 VDC

7 to 10 VDC

9 to 16 VDC

..............................................................................................................................

..............................................................................................................................

...............................................................................................................................

..................................................................................................................

✔✔

9.5 to 30 VAC/DC

Current

20uA typical

8mA typical, 10mA max
18mA typical, 20mA max 6179

..............................................................................................................................

.................................................................................................................

................................................................................................................

✔✔

50mA max

Alarm Loop Rating

16 VDC, 50mA

..........................................................................................................................

✔✔N/A 6177

30 VAC/DC, 1A; 125 VDC 50mA 6179

Alarm Output

Fail Safe contacts with 10 Ohms in series
Form A, normally closed (SPST) 6155, 6155CT, 6155AL 6155XT

Form C, normally closed and open (SPDT) 6157, 6157CT, 6157AL 6157XT 6177
Form C, no resistance in series 6179

.........................................................................................................

.............................................................................................

.........................................................................................................

Normally high and normally low

Alarm Duration

2 to 5 seconds

............................................................................................................................

✔✔

2 to 5 seconds in walktest mode
5 to 9 seconds in RF mode

.............................................................................................................

0 to 90 seconds retriggerable, adjustable 6179

Cover Tamper Contacts

Normally closed, rating: 50mA, 16-volts, no resistance

................................................................................

✔✔✔✔

Normally closed, rating 50mA, 16-volts, 10 Ohms in series

Environmental

Operating Temperature

0°F to 122°F (-17°C to 50°C) 6155, 6155AL

.............................................................................................................

6157, 6157AL

✔✔✔

-40°F to 122°F (-40°C to 50°C) 6155CT, 6157CT

✔

✔

✔

✔

6177

✔

6177

✔

SPACE DETECTION

Humidity

Dust Proof, Water Resistant

.............................................................................................................

10% to 90% noncondensing ✔✔✔

RFI Immunity

Greater than 10V meter from 0 to 1000 MHz

............................................................................................

✔✔✔✔

Lightning Immunity

2.5KV, 2 joules max energy impulse,
1 msec rise/50 msec decay

...............................................................................................................

Static Discharge 20KV

✔✔ ✔
✔✔✔✔

✔

2.4

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Introduction

SPECIFICATIONS

6180 6190 6250 6255FM 6350

Series Series Series Series Series

Electrical

Voltage

3 Volt & 9 Volt Wireless
7 to 16 VDC

7 to 10 VDC

9 to 16 VDC 6197

..............................................................................................................................

..............................................................................................................................

...............................................................................................................................

9.5 to 30 VAC/DC

Current

20uA typical

..............................................................................................................................

8mA typical, 10mA max
18mA typical, 20mA max
50mA max 6197

Alarm Loop Rating

16 VDC, 50mA

30 VAC/DC, 1A; 125 VDC 50mA

Alarm Output

Fail Safe contacts with 10 Ohms in series
Form A, normally closed (SPST) 6198 6255 6255FM 6351, 6352

Form C, normally closed and open (SPDT)
Form C, no resistance in series
Normally high and normally low

Alarm Duration

2 to 5 seconds
2 to 5 seconds in walktest mode

5 to 9 seconds in RF mode
0 to 90 seconds retriggerable, adjustable

Cover Tamper Contacts

Normally closed, rating: 50mA, 16-volts, no resistance

Normally closed, rating 50mA, 16-volts, 10 Ohms in series 6197

Environmental

Operating Temperature

0°F to 122°F (-17°C to 50°C)

-40°F to 122°F (-40°C to 50°C)

Humidity

Dust Proof, Water Resistant

10% to 90% noncondensing

RFI Immunity

Greater than 10V meter from 0 to 1000 MHz

Lightning Immunity

2.5KV, 2 joules max energy impulse,
1 msec rise/50 msec decay

Static Discharge 20KV

..................................................................................................................

.................................................................................................................

................................................................................................................

..........................................................................................................................

.........................................................................................................

.............................................................................................

.........................................................................................................

............................................................................................................................

.............................................................................................................

................................................................................

.............................................................................................................

.............................................................................................................

............................................................................................

...............................................................................................................

✔

✔

6198

6198

✔✔✔

✔✔✔

✔✔ ✔ ✔✔

✔

6197 6257 6257FM 6353

✔✔ ✔✔✔

✔

✔

6198

6198

6197-PIR only

✔✔

6255, 6257 6255FM, ✔

6257FM

6352, 6353

✔✔
✔✔

✔

✔✔

✔✔ ✔ ✔✔

✔✔ ✔ ✔✔
✔✔ ✔ ✔✔

SPACE DETECTION

2.5

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Introduction

PIR INSTALLATION GUIDELINES

SPACE DETECTION

Passive Infrared (PIR) motion sensor technology provides one of the most reliable
and cost effective methods for protecting spaces in the home, office or industrial
facility. PIR detectors sense temperature contrasts between a relatively stable
background and hotter or colder objects moving across their fields of view. They
emit no energy of their own. They merely “see” infrared images.

Sentrol, the world leader in security and life safety sensor devices, offers a
complete line of PIRs suitable for every application — residential, commercial,
and industrial. Sentrol PIR detectors fit compactly, aesthetically and unobtrusively
into any environment. This application section is designed to help you select the
appropriate PIR for your particular needs.

IMPORTANT DOs AND DON’Ts FOR ALL INSTALLATIONS —
residential, commercial or industrial.

• Do position the PIR so that any intruder must cross the PIR’s field of view. To
trigger an alarm, an intruder must cross both the positive and negative elements
of one zone of the PIR’s sensor.

• Do pre-test the PIR in the direction of likely intruder motion and walk-test
monthly.

• Do locate the PIR so that valuables are well within its coverage pattern.

• Do terminate each protection zone on a solid object such as a wall or floor
whenever possible. This provides maximum detection.

• Do mask zones around fireplaces because a smoldering log can change
temperature quickly if it bursts into flames.

• Do use an industrial PIR in locations where a standard PIR may be affected by
water, steam or oil.

• Don’t aim PIR detectors at sources of rapid heating or cooling. These include
forced air ducts, space heaters, direct sunlight, strong white lights and mirrors
that can reflect strong lights.

• Don’t obstruct the PIR’s field of view.

SPACE DETECTION

2.6

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Introduction

OTHER INSTALLATION TIPS

Pre-wiring — Pre-wiring allows you to work with the builder in the planning
stage to determine optimum locations for sensors. It will also allow you to avoid
many of the hazards inherent in post-construction installations i.e. drilling through
the electrical cables, plumbing, and duct-work hidden in existing walls.

When wiring after construction, compromises are usually the norm — existing
walls, lighting fixtures, air conditioning ducts, and other obstacles often determine
sensor and control panel locations. Compromises such as these can leave “blind
spots” in security installations.

Pre-wiring also allows you to run extra wires, a practice rarely seen in “post-wired”
systems. Extra wires give the home or business owner the flexibility to easily add
other features at a later date.

Pre-wiring allows you to avoid many of the hazards inherent in post-construction
installations hazards such as water supply pipes, drain-waste-vent pipes, heating
and cooling duct work, venting duct work for kitchens and bathrooms, and high
voltage wiring.

Sensors are now available that will fit into standard outlet boxes just like a light
switch. Sentrol offers two products for prewiring applications. The Flush Mount
SureShot PIR fits into a standard single gang box, remodel box or rough-in plate in
two easy steps. You simply connect the wires to the proper terminals on the back
of the unit, then screw the unit into an outlet box like you would a switch. The
Sharpshooter also has a recessed bezel kit available as an accessory.

Reducing False Alarms — Sentrol PIRs allow selection of one- or two-zone
detection. Each zone is made up of two fields of view — one positive and one
negative. With one zone selected, an alarm will be indicated when an intruder
moves across one positive and one negative field. With two zones selected, an
intruder must cross the
positive and negative fields
of each of the two zones
before an alarm will be
indicated. Two-zone
detection is recommended
(except when using long
range and curtain lenses) to
reduce chances of false
alarm. One- and two-zone
detection is selected by
simply moving the jumper
as indicated in the diagram.

Two Zones

Remove

(4 pulse)

for

One Zone

Test

(2 pulse)

SENTROL, INC.
SHARPSHOOTER
6155XT

NC COM TAMP TAMP

+–

Two Zone

One Zone

SPACE DETECTION

2.7