Greyline Instruments LIT25 Specifications

Level Indicating Transmitter

with Non-Contacting Ultrasonic Sensor

for Tank Inventory, Level Monitoring and Control

Level Indicating

Transmitter

Model LIT25

for Chemical Storage Tanks,

Sumps, Reservoirs and Lagoons

Transmits

Displays

Controls

Low Cost, Non-Contacting Level Transmitter

The LIT25 Level Indicating Transmitter features a 4-20mA output
rated up to 1000 ohms. This output is isolated and ready for direct
connection to your PLC or Controller.

Mount the watertight display enclosure at a convenient location
where the large, 4-digit LCD Display is visible to Operators. Use the
built-in Keypad for calibration without climbing the Tank.

Use the LIT25 signal Relay output to control pumps and alarms.
Calibrate for level, echo loss or temperature alarm.

RELIABLE MEASUREMENT AND CONTROL

LIT25 Level Indicating Transmitter

P
P
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NON-CONTACTING SENSOR

The LIT25's ultrasonic, echo-ranging sensor mounts at
the top of the tank to continuously monitor level. No
maintenance is required.

A built-in temperature sensor is included to automatically
compensate for changes in speed of sound due to
temperature. Level and temperature signals share a
single coaxial cable which can be run up to 500 ft (152
m) to the electronics enclosure. The standard Sensor is
rated for tank sizes up to 32 ft. (10 m) high, and is made
with PVC and Teflon (an optional all-Teflon model is also
available). The sensor and cable is rated intrinsically
safe (with optional intrinsic safety barrier) for installation
in hazardous rated tanks.

Simple Calibration with 2-button keypad

Large 4-digit LCD display

Non-Contacting, no maintenance sensor

Isolated 4-20mA output (1000 ohm)

Relay for alarm or control

Automatic temperature compensation

Watertight, dust tight enclosure

Low Cost High accuracy (±0.25%)

–

Calibrate without
climbing tanks!

DESIGNED FOR OPERATOR CONVENIENCE

Mount the LIT25 Display enclosure at a convenient location
for operators. The large LIT25 digital display indicates that it
is calibrated in percent, inches or cm, and in RANGE or
LEVEL mode. Relay status is also displayed and the ECHO
symbol flashes to indicate that echos are being received
normally.

Special LIT25 features like OUTPUT SIMULATION allow
operators to test calibration, loop wiring, and relay set-points
directly from the LIT25 keypad. Simplify calibration or tank
measurement with the LIT25's RANGE display – instantly
display distance in inches or cm from the sensor to the
target or liquid surface.

EASY CALIBRATION
WITHOUT CLIMBING TANKS

Use the 2-button

ECHO

963.8

RANGE LEVEL PERCENT INCHES CM

set-points in inches or cm. No calibration targets or
level simulations are required. Calibration values are
stored through power interruptions and no battery is
required.

RELAY

keypad built into
the LIT25 display
enclosure to
directly enter the
measurement
span and relay

Use the LIT25 keypad to increase or decrease DAMPING
and control the instrument's response to turbulence, wave
action or agitators. Increase damping to completely reject
agitator blades or other moving obstructions even when they
travel through the sensor sound path.

LEVEL or TEMPERATURE CONTROL

Calibrate the versatile LIT25 relay for your choice of level
alarm, pump control, temperature alarm or echo loss alarm.
Relay ON and OFF set-points are independently adjustable
through the LIT25 calibration keypad. You can even control
the LIT25's response to an echo loss condition – Hold the
last reading, output 20mA or output 4mA.