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.