Greyline Instruments SLT Data sheet

Non-Contacting Level & Flow Meter

for Tank Inventory, Pump Control and Open Channel Flow

Level & Flow Monitor

Model SLT 5.0

For Chemical Tank Level

Sumps and Pump Stations

Flow through Flumes and Weirs

Simple 5-key Calibration

Isolated 4-20mA Output

Programmable Control Relays

Use it for Level

Use it for Flow

No maintenance Sensor

SLT 5.0 Accurate, Simple and Reliable–

Specify SLT 5.0 for inventory monitoring and level control of chemicals,
wastewater, viscous or corrosive liquids. Built-in control relays are
programmable for pump control, pump alternation and level alarms.

Displays, transmits and totalizes wastewater flow through any flume or
weir. Features a simple, password protected calibration system, automatic
totalizer and flow proportionate control relays.

Each SLT 5.0 includes a non-contacting ultrasonic sensor which mounts
above the material being measured. There is no contact and no moving
parts. The sensor is sealed to withstand accidental submersion and rated
for hazardous locations with optional intrinsic safety barrier.

RELIABLE MEASUREMENT AND CONTROL

Greyline SLT 5.0 Level & Flow Monitor

Simple Installation and Calibration

Mount the SLT 5.0 non-contacting ultrasonic sensor above
the liquid to continuously monitor level or flow. The Sensor
self-tunes to extended cable lengths so the electronics
enclosure/display can be mounted at a convenient location.

Select LEVEL mode for Tank Inventory and Level Control

Set-up is fast and easy through the SLT 5.0 calibration menu. Use the built-in
keypad to scroll through the menu prompts and configure the SLT 5.0 to display
level in your choice of measurement units (ft, inches, meters, mm, gallons, liters,
percent etc.) for vertical and horizontal round tanks. Connect external devices
through the SLT 5.0's isolated 4-20mA output or control relays.

Select FLOW mode for Open Channel applications

Calibration is easy with menu selection of common flumes including Parshall,
Palmer Bowlus, Trapezoid and Weirs including V-Notch and Rectangular. Use
Greyline’s PC software ‘Find K&n’ (included) to calibrate to non-standard or custom
flumes and weirs.

Displays, Totalizes, Transmits & Controls

The SLT 5.0 large backlit digital display shows the flow rate, relay status and
totalizer. Use the isolated 4-20mA output to transmit to chart recorders, and program
the built in control relays for flow proportionate control (for samplers, chlorinators or
external totalizers), and for flow/level alarms.

No Contact Sensor = No Maintenance

The SLT 5.0 Sensor mounts over the flume or weir, so there is no sensor fouling or
maintenance required. With built-in temperature compensation, the SLT 5.0
maintains high accuracy (±0.25% of full scale) to meet environmental monitoring
requirements.

Pump Control and Alarms

Program separate On and Off set-points for the SLT 5.0's two built-in control relays.
Use them for pump control, pump alternation, high or low level alarms, air
temperature alarms, actuated valves or annunciators.

Plug and Play Options

Need a data logger? Just plug-in options like this 4-relay circuit

extra relays or

board to expand the functions of your SLT 5.0. The instrument auto-detects the new

cir circuit and automatically adds it to the calibration menu. With the original two relays

plus an additional four, the SLT 5.0 can handle complex level control applications.

Advanced Operating System

You can control the SLT 5.0's response to conditions like turbulence or splashing and to reject tank agitators. The SLT

5.0 automatically adjusts itself to obtain the best signal. False echoes are suppressed and filtered to accurately display
the correct level.

Isolated 4-20mA Output

Ready for direct connection to PLC's or computers and rated for 1000 ohm resistive load. Programmable offsets allow 4
and 20mA to be offset from the instrument calibration for special control applications.

SLT 5.0 Specifications

General Specifications

Electronics Enclosure:

Accuracy:

Display:

Operating Modes:

Programming:

Power Input:

Output:

Control Relays:

Electrical Surge Protection:

Operating Temp. (electronics):

Approximate Shipping Weight:

Sensor Specifications

Maximum Range:

Deadband (Blanking):

Beam Angle:

Operating Frequency:

Exposed Materials:

Operating Temperature:

Operating Pressure:

Sensor Cable:

Popular Options

Sensors:

Sensor Cable:

Intrinsic Safety Barriers:

Power Input:

Control Relays:

Enclosure Heater:

Data Logger:

Sensor Mounting Stand:

Greyline SLT 5.0 Level & Flow Monitor

Watertight and dust tight NEMA4X (IP 66) polycarbonate with clear, shatterproof cover
±0.25% of Range or 2 mm (0.08") whichever is greater, Repeatability and Linearity: ±0.1%
White, backlit matrix - displays flow rate, totalizer, relay status, operating mode and
calibration menu
Level, Range or Open Channel Flow
built-in 5-key calibrator with English, French or Spanish language selection
100-240VAC 50-60Hz (see Options), 3.5 Watts maximum (with standard features)
Isolated 4-20mA, 1000 ohm load maximum, programmable offset
2 form 'C' dry contacts rated 5 amp SPDT; programmable level alarm, pump

Relays,
control, pump alternation, failsafe/echo-loss, air temperature alarm
Sensor, 4-20mA and AC power input

-5° to 140°F (-20° to 60°C)
10 lbs. (4.5 kg)

32 ft (10 m) with standard PZ32T sensor (Optional sensors for longer ranges)
Programmable, Minimum 12 in (305 mm)
8°, Locate sensor 1 ft (300 mm) from tank sidewall for every 10 ft (3 m) depth
42 KHz
PVC and Teflon

-40° to 150°F (-40° to 65°C) with automatic temperature compensation
20 psi (1.35 bar) maximum
RG62AU coaxial, 25 ft (7.6 m) standard length (See Options)

Long range models / all Teflon construction / intrinsically safe / flange mount
50 ft. (15 m) continuous or 100 ft. (30 m) continuous RG62AU coaxial from Sensor, or
splice up to 500 ft (150 m) with Junction Box
For Sensor mounting in Class I,II,III, Div. I,II, Groups C,D,E,F,G hazardous locations
9-32 VDC
4 additional (6 total), rated 5 amp SPDT
Thermostatically controlled - recommended for temperatures below 32°F (0°C)
2 million point logger with USB output to Flash memory sticks, Windows software
For Open Channel Flow applications

Dimensions

25 ft (7.6 m) RG62AU
COAXIAL CABLE
50 ft (15 m) OPTIONAL

¾" NPT

ISOLATION
COUPLING
(SUPPLIED)

~ 5"
(127 mm)
OVERALL

3.875"

98.4mm

1.75"

44.5 mm

PZ32T SENSOR

¾" NPT

7.4 / 188 mm"

6.46 / 164 mm"

SLT 5.0

Level & Flow Monitor

CONDUIT ENTRY

LOCATION

10 / 254 mm"

10.94" / 278 mm

ENCLOSURE

5.12 / 130 mm"

SIDE VIEW

User-Friendly, Non-Contacting

SLT 5.0 Level & Flow Monitor

Tank Inventory and Pump Control

Level

w

Displays Continuous Level
Controls Pumps and Alarms

w

Transmits 4-20mA

w

Flow

w

Works with any Flume or Weir
Built-in Totalizer

w

Password protected

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Mount the non-contacting ultrasonic sensor above the liquid being measured to
monitor liquid level or volume in storage tanks, or to control pumps and level alarms in
wet wells and pump stations.

Open Channel Flow Monitoring

The SLT 5.0 measures open channel flow through flumes and weirs. Select the flume
type from the calibration menu. Flow rate and total are displayed on the backlit LCD
display.

Built-in 5-Key Calibrator No Special Programming Codes–

Scroll through the SLT 5.0 set-up menu to control the instrument's operating features
and calibration. Forget about Parameter codes and complex calculations! The SLT

5.0 automatically calculates, converts and displays common engineering units (metric,
English, US). Program it for tank level...horizontal round tank volume...range or tape
measure mode...or open channel flow.

Use output simulation mode to take manual control of the SLT 5.0 display, 4-20mA
and control relays. You can test operation of equipment connected to the SLT 5.0 and
confirm correct calibration.

The standard sensor is constructed of PVC with a Teflon face and is designed to
withstand accidental submersion.
±0.25% accuracy over the operating temperature range.
Safety for hazardous locations and all-Teflon or flange-mount construction for harsh,
corrosive applications.

Built-in temperature compensation maintains

Options include Intrinsic

How to Order

Applications Support

No Risk Appraisal

The Greyline Guarantee

Canada: 16456 Sixsmith Dr., Long Sault, Ont. K0C 1P0

Tel: [phone] Fax: [phone]

USA: 105 Water Street, Massena NY 13662

Tel: [phone] Fax: [phone]

Internet: www.greyline.com E-mail: [e-mail]

Contact a Greyline sales representative in your area or phone one of our sales
engineers. Describe your requirements and receive our prompt quotation.

Take advantage of Greyline's applications experience. Phone toll free 1-888-473-9546
for advice or information on applications, installation or service for Greyline products.

The Greyline SLT 5.0 Level & Flow Monitor must meet your requirements. Discuss
your application with a Greyline representative to arrange a 30-day trial.

Quality of Materials and Workmanship - Each instrument manufactured by Greyline is
warranted against defects in materials and workmanship for a period of one year from
date of purchase. Refer to our limited warranty included with each product.

RELIABLE MEASUREMENT AND CONTROL