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Power IEPE Sensors with voltage not current: The µStick
IEPE sensors need a constant current power source. However, many laboratories use data acquisition systems that only have constant voltage sources. Till now, IEPE could not be used here even if they would be the better choice, be it due to their higher dynamic response or smaller size (e.g. triaxial accelerometers sized 6 mm cube are available). The µStick makes this possible.
The module is simply connected to the BNC-Connector of the sensor. A 4-Pin M8 connector is used to connect the module to the electronics, two pins for the signal and two for the supply. Any voltage supply between 9-30VDC will do and is usually on board the electronics. The high bandwidth of the internal analogue amplifier (0.5 Hz to 70 kHz @ 3dB) allows using the µStick with IEPE sensors with very high dynamic responses. The full scale ±5V voltage output signal is proportional to the physical quantity. Additional Gains of 10x and 20x can be selected using the slide switch on the side of the housing. The amplified signal has an excellent signal to noise ratio which makes accurate measurements possible even in the lower measurement range of insensitive, high range sensors. For triaxial sensors three modules can be stacked and screwed together.
The µStick gives a tailored and affordable access to IEPE sensors to users of data acquisition systems that are not IEPE compatible without having to invest in an additional complete IEPE-specific instrumentation system.
For further information visit our website: www.sensors.de
For sensor know-how, visit our online sensor compendium www.sensoren.info (in German)
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