Measure & Control Solutions

ULT-100 Ultrasonic Level Indicator

Ultrasonic Level Indicator, also called Ultrasonic level sensor, or ultrasonic level transmitter.

Ultrasonic Level Transmitter provides reliable, accurate, non-contact measurement of liquid levels.

Ultrasonic non-contact technology offers no moving parts to wear, jam, corrode or get coated like contact technologies.

Mapping software makes an effective measuring surface only a 3″ diameter column.

No concerns with ladders, pipes, or other tank intrusions in the remaining sound cone.

Unit is FM approved explosion-proof making it ideal for use in hazardous locations.

ULT-100 ultrasonic level gauge is a high-frequency pulse sound wave,

generated by the transducer (probe),

is reflected back to the measured material (liquid, solid) surface,

and the reflected echo is received and converted into an electrical signal,

by the same transducer.

This signal is controlled remotely by A microprocessor program.

It can display many typical modes so that the level gauge can adapt to various complex working conditions,

such as solid, liquid, dust and so on.

Learn About: Magnetostrictive level transmitter

Magnetostrictive level sensor

Features of Ultrasonic Level Transmitters

Explosion-Proof, Mapping Software, 3″ (76.2 mm) Measuring Column

Suitable for strong corrosive or viscous

Flameproof ExdIICT4

Two-wore system

Anti-interference ability

1. Provides reliable, accurate, and non-contact level measurement of compatible liquids

2. Non-contact technology offers no moving parts to wear, jam, corrode or get coated like contact technologies

3. Mapping software makes effective measuring surface only a 3″ (76.2 mm) diameter column,

with no concerns of ladders, pipes,

or other tank intrusions in the remaining sound cone

4. FM approved explosion-proof making it ideal for use in hazardous locations

5. Easy programming with 6 digit LCD display and simple menu structure

6. Output range is adjustable with choices of inputting tank dimensions,

or by filling and emptying the tank,

while calibrating and it automatically and scaling to levels it senses

7. Window cover allows easy viewing of the display

8. Fail-safe output options and diagnostic capabilities

New: SI-LT Magnetostrictive level transmitter with Local Digital Display

Specifications of Ultrasonic Level Transmitters

Wire System
Two-wire system
Installation mode
Basic parameters
Maximum measuring range
(High temperature, fluid)
Maximum measuring range
(high temperature, moisture)
Maximum measuring range
(particle > 4mm solid)
Blind area
measurement accuracy
±0.3%FS(Standard conditions)
Power supply
Max electric current
Ripple requirement
less than ±20mA
Analog signal
Digital signal
RS485, HART 5.0, Modbus RTU
4 way
Die Casting Aluminum Alloy
Waterproof ABS/Corrosion Resistant PTFE
Flange standard needs to be provided by customers. Size is related to installation method.
Various kinds of PVC, PP, PTFE, carbon steel and stainless steel flanges can also be customized.
Environment condition

Ambient temperature
-20°C~60°C. If temperature less than 20°C, LCD display will be limited.
Outdoor instruments should be protected against ultraviolet rays if they are exposed to direct sunlight.
Protection level
Explosion proof level
Flamproof type ExdIICT4
Intrinsically safe type ExiaIICT4
Process condition
Process temperature
-40℃~100℃, High temperature probe is required when exceed 70℃
Process pressure
0.8~3bar or 0.08~0.3MPa, Below 3000m altitude.
Product characteristics
Analog and digital output can be shared
High level of protection
Strong anti-interference ability
Comprehensive function
ultrasonic level transmitter

Applications of Ultrasonic Level Transmitters

Applications of Ultrasonic Level Transmitters
Drawings of ultrasonic level transmitter

What is the principle of ultrasonic level measurement?

Ultrasonic waves detect an object in the same way as Radar does it.

Ultrasonic uses sound waves, and Radar uses radio waves.

When the ultrasonic pulse signal is targeted towards an object, it is reflected by the object, and the echo returns to the sender.

The time traveled by the ultrasonic pulse is calculated, and the distance of the object is found.

Bats use a well-known method to measure the distance while traveling.

The ultrasonic level measurement principle is also used to find out fish positions in the ocean, locate submarines below water level, also the position of a scuba diver in the sea.

Ultrasonic Level Measurement Fig1

We will refer to Fig-1,

and make an effort to understand the technicalities of the ultrasonic level transmitter.

An ultrasonic level transmitter is fixed at the top of a tank half-filled with liquid.

The reference level for all measurements is the bottom of the tank.

Level to be detected is marked as “C”, and “B” is the distance of the ultrasonic sensor from the liquid level.

Ultrasonic pulse signals are transmitted from the transmitter,

and it is reflected back to the sensor.

Travel time of the ultrasonic pulse from the sensor to target and back is calculated.

Level “C” can be found by multiplying half of this time with the speed of sound in air.

The measuring unit final result can be centimeters, feet, inches, etc.

Level = Speed of sound in air x Time delay / 2

Ultrasonic Level Transmitters

Ultrasonic technology is a perfect choice for level applications that require low cost,

non-contact measurement of liquids and slurries for level, distance, volume, and open channel flow.

These products have excellent accuracy and will handle measurements up to 30’.

Read more: Guide: Non-contact Ultrasonic Level Sensing transmitters

Sino-Instrument offers 20 ultrasonic level indicator products.

About 13% of these are ultrasonic level transmitters, 4% are ultrasonic level sensors.

A wide variety of ultrasonic level transmitter options are available to you, such as free samples, paid samples.

Sino-Instrument is ultrasonic level transmitter suppliers, located in China.

Ultrasonic level transmitter products are most popular in North America, Mid East, and Eastern Europe.

The United States, and India, which export 99%, 1%, and 1% of ultrasonic level transmitter respectively.

You can ensure product safety by selecting from a certified supplier,

with ISO9001, ISO14001 certification.

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