SONARANGE® ultrasonic sensors - if other technologies fail

Sensor selection table

 

Distance

1 binary OUT

2 binary OUT

0...10V

analogue OUT

4....20mA

analogue OUT

<200mm

UPS      UPX      UPL

 

UPS

UPS

<500mm

UPX

UPK

UPK

UPK

<1000mm

UPR-B

UPK

UPK UPK

<1500mm

UPR-A

UPR-A

UPR-A

<2500mm

 

UPK

UPK

UPK

<5000mm

 

UPK

UPK

UPK

through beam

UPB

 

 

 

fork

UPF-B UPF-L UPF-A  

 

 

Ultrasonic sensors

 

Ultrasonic sensors are mainly used in machine manufacturing and process control for distance measurement, as proximity switch or for room supervision.

 

The proximity type sensors work after the principle of time of flight measurement of sound. The time of flight in air (forth and back) is approx. 6ms per meter. The new innovative ultrasonic fork sensors however work after the principle of sound amplitude evaluation.

 

Compared to other measuring principles ultrasound is very robust. It passes dirty environment as well, and it is reflected by almost all surfaces. Thus it is independent of material, colour and surface structure of the target to be detected.

 

On the right one sees the remarkable influence of ultrasonic frequency on the sensor characteristics.

 

 

Why ultrasound?

 

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Independent of material, surface, colour, size

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Works under dust, dirt, fog, bright light

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Detects transparent and shining objects

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Wide measuring ranges from few mm up to >5m

 

 

Why ultrasonic sensors from SNT Sensortechnik AG?

 

SNT Sensortechnik AG is a pioneer in the field of ultrasonic sensors for distance measurement. The SONARANGE ultrasonic transducers are developed and manufactured in house. They differ from other products especially through their high emitted sound power. This enables them to detect also small and moving objects.

 

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SNT sensors have a measurably higher sound power thanks to SONARANGE transducer design and high transmitter voltage.

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This makes the sensors more sensitive and thus they detect also moving and small targets.

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SNT offers a wide product range

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SNT offers customized solutions

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SNT develops ultrasonic transmitters with help of FEM simulations

 

 

 

sonic lobe at 100kHz

 

sonic lobe at 200kHz

 

sonic lobe at 300kHz

 

FEM model of an ultrasonic transducer

 

Animated oscillation shapes of sensor diaphragm

 

 

 

UPR sensor (one-half)

UPK sensor (one-half)

 

 

Limits of ultrasonic sensors

 

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Relatively slow (switching speed approx. 1...25Hz)

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Exception: Ultrasonic barrier (>200Hz)

Aufzählung

Resolution approx. 0.5...2mm (due to wave lenght of sound)

Aufzählung

Works only in air

Aufzählung

Have problems with very hot or very cold targets

 

 

Flash Video