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OPTICAL LIQUID-LEVEL SENSOR
Double-Wall Pipe
LV 17 0
LV 17 0
Fiberglass,
Double-Wall
Ta nk
Containment
Sump
Your Controls
Light
Lost in
Liquid
Liquid immersing
the sensing prism.
Receiver
Prism
LED
Light
from
LED
Liquid below the
sensing prism.
Prism
Receiver
LED
Integral Pull
LV171, $144, shown
larger than actual size.
⻬ Compact—Fits Interstitial
Spaces
⻬ Unaffected by Vapors,
Even at High
Concentrations
⻬ Easily Removed,
Cleaned, and Reinstalled
⻬ No Moving Parts
The LV170 optical liquid sensor
accurately detects the presence of
liquid in fiberglass double-wall
tanks, containment sumps, and
double-wall pipes. Built-in electronic
switching ensures dependability
throughout its long service life. This
reusable sensor easily fits small,
interstitial spaces and senses liquid
hydrocarbons or water. The unit is
unaffected by hydrocarbon vapors,
Note: The LV170 sensor is a non-voltage-producing device and does not contain energy
storing components. However, because primary use is in hazardous locations, an appropriate
intrinsically safe interface device is required for its use.
thereby greatly reducing the risk of
false alarms. The LV170 sensor is
easy to remove, clean, and reinstall
after an alarm condition is triggered,
or for maintenance.
The LV170 electro-optical sensor
contains an infrared LED and a light
receiver. Continuous light from the
LED is directed into a prism that
forms the tip of the sensor.
If no liquid is present, light from the
LED is reflected within the prism to
the receiver. When rising liquid
immerses the prism, the light is
refracted out into the liquid, leaving
little or no light to reach the receiver.
Sensing this change, the receiver
actuates electronic switching within
the unit to operate an external alarm
or control circuit.
Fiberglass Double-Wall Tank,
and Piping Sump Applications
LV170 Series
$
144
Containment Sump,
Double-Wall Pipe,
K-75
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Zener Barrier*
DC
Power
Supply
GND
Earth Ground
Black
Red
Switch
Output
SPECIFICATIONS
2-5/8" REF.
(66.7 mm)
Cable
1/8" DIA. Hole
Through
Removable
PVC
Pull Ring
Wetted Materials:
Polysulfone, PVC, epoxy
Operating Temperature:
-17.8 to 80°C (0 to 176°F)
Current Consumption:
Approximately 18 mA
Output: TTL/CMOS compatible;
may sink up to 40 mA
Cable: 3-conductor PVC jacketed
[7.6 m (25') extended]
Approvals: UL for Class I,
Group D Hazardous Locations
Weight: 340 g (0.75 lb)
Max Pressure: 150 psig
Integral pull
"
4
1
⁄
Electrical Parameters
Entity Parameters for 10 to 28 Vdc Input
Terminal V
Red/Black 38V 150 mA 0.052 µf 0
White/Black 38V 150 mA 0.052 µf 0
V
≥ VOC(Barrier)
MAX
I
≥ ISC(Barrier)
MAX
CI+ Ccable ≤ C(Barrier)
LI+ Lcable ≤ L(Barrier)
Definitions:
VOC= Maximum Open Circuit Voltage
ISC= Maximum Short Circuit Current
CI= Internal Capacitance
LI= Internal Inductance
Typical Wiring Diagram
MAX
I
MAX
LV171, $144,
shown larger than
actual size.
I
C
I
L
K
MOST POPULAR
MODELS HIGHLIGHTED!
To Order
(Specify Model Number)
Model No. Price Conditions
LV171 $144 Wet probe =
LV172 144 Dry probe =
Comes complete with 7.6 m (25'),
3-conductor PVC jacketed cable
and operator’s manual.
Ordering Example: LV171, wet probe
sensor, $144.
Output
current sink
current sink
*Source voltage not greater than 250 Vac. Zener barriers must be installed in
accordance with barrier manufacturer’s instructions.
K-76
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