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Ultrasonic Level Measurement

Ultrasonic sensors use time of flight of sound in air to sense objects and to measure distance. The SNT Sensortechnik ultrasonic range enables contactless level measurement using these principles. Specialised models are available for applications involving oils or aggressive chemicals.

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LS20 Ultrasonic Level Sensor

The LS20 facilitates contactless measurement of distance to an object within the detection zone. The switched output is set depending on the adjusted detect distance. LS sensors have internal temperature compensation- because the sensors heat up on their own, the temperature compensation reaches its optimum working point after approximately 30 minutes of operation. The sensors indicate the blind zone in which the distance cannot be measured. The operating range indicates the distance of the sensor that can be applied with normal reflectors with sufficient function reserve.

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EL Ultrasonic Level Transmitter

The EL level transmitter consists of an ultrasonic sensor which, contact-free, determines the separations of media of different types (fluids, transported goods, solids) through end-to-end measurement. Emitted ultrasound impulses are reflected at the surfaces, and return to the transducer after a transit time proportional to the distance. It is possible to synchronise up to 12 sensors with one another by connecting their control inputs, or also to switch off the sensor by connecting control input to 0 V.

When switched off, the signal last existing at the analog output is frozen until the sensor is released again. When synchronised, the sensors' pulse packages are emitted simultaneously, after which the received ultrasound echo from each individual sensor is evaluated and presented at the analog output.


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OMNI-L Ultrasonic Switch/Level Transmitter

The OMNI-L level sensor consists of a primary ultrasound sensor which, contact-free, determines the separations of media of different types (fluids, transported goods, solids) through end-to-end measurement. Emitted ultrasound impulses are reflected at the surfaces, and return to the transducer after a transit time proportional to the distance. The electronics then output an analog signal proportional to the separation, displayed in cm or inches (other units available on request).

By turning the programming ring right or left, it is simple to modify the parameters (e.g. switching point, hysteresis). To protect from unintended programming the ring can be turned through 180° and replaced or completely removed, thus acting as a key.


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UPR-A Compact Ultrasonic Level Sensor

The compact UPR-A ultrasonic sensors are characterised by a wide measurement range of 1.5m. These sensors are configurable via a "teach in" function. Three different detection beam sizes can be set by the user allowing the sensor to be adapted to the application.

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UPR-A CP Compact Ultrasonic Level Sensor for use with aggressive chemicals

Based on the UPR-A ultrasonic sensor, the UPR CP sensors are specially designed for use in chemically harsh environments. The chemical resistance is based on the use of PVDF & PTFE materials on exposed areas.

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UPR-B Compact & Economical Ultrasonic Level Sensor

The compact UPR-B ultrasonic sensors have a wide measurement range adjustable between 100mm to 1000mm. These sensors are configurable via a "teach in" function. The UPR-B sensor features sealing that renders them impervious to many environmental influences. They are particularly resistant to oil, unlike many other ultrasonic sensors.

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UPS Ultrasonic Level Sensor

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UPS FB Miniature Ultrasonic Level Sensor with narrow focus detection beam

This adaptation of the UPS ultrasonic sensor has a very narrow focus beam suitable for measurements where the detection region is very small.

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UPS CP Miniature Ultrasonic Level Sensor for use with aggressive chemicals

Based on the UPS ultrasonic sensor, the UPS CP sensors are specially designed for use in chemically harsh environments. The chemical resistance is based on the use of PVDF & PTFE materials on exposed areas.

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