Systems using ultrasonic sensors provide a cost effective sensing method with unique properties not possessed by other sensing technologies. By using a wide variety of ultrasonic transducers and several different frequency ranges, an ultrasonic sensor can be designed to solve many application problems that are cost prohibitive or simply cannot be solved by other sensors. Ultrasonic sensors continuously emit high frequency sound pulses inaudible to the human ear which travel away from the sensor, hit the surface of the target and are reflected back to the sensor. The sensor electronics measure the time taken by the signals to return after being reflected by the target surface.

Since the speed of sound is affected by air temperature, our ultrasonic sensors include a built-in temperature sensor. Level/distance measurements are automatically temperature compensated throughout the operating temperature range of the sensor.

Sigma has a variety of models available to satisfy the requirements of most demanding applications.

highlights

Direct measuring value output in mm/cm or % via LED display
Temperature compensation for accurate measuring with fluctuating temperature
accuracy with temperature drift internal compensation, =< 2%
Numerical sensor setting via LED display for a complete pre-setting of the sensor
1 or 2 pnp or npn switching outputs for all controls
Analogue output 4-20 mA and 0-10 V for two signals in one device
Operating voltage 9-30 V for application in various supply networks
Additional teach-in-function for a traditional setting of detect points
Automatic synchronisation for simultaneous operation of up to ten sensors in confined spaces
Automatic switchover between current and voltage output for simple operation

Different operating modes and device configurations enable our ultrasonic sensing systems to be used in most conceivable automation applications