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Accelerometers for gas turbine bearing monitoring

23 January 2016

PCB Piezotronics has introduced two hazardous area approved differential output charge accelerometers from IMI Sensors that are suitable for use in high temperature applications such as gas turbine monitoring.

Model EX615A42 is capable of working at temperatures up to 260°C and offers sensitivity of 100pC/g, a measurement range of ±200g peak and a frequency range of 5kHz ±5%. The sensor has a stainless steel housing and features a 3m armoured, low-noise PTFE cable terminating in pigtails.

The second accelerometer – model EX619A11 – is capable of operation up to 482°C with sensitivity of 50pC/g, measurement range of ±500g and frequency range of 3kHz ±5%. This sensor has a nickel housing with an integral 2.1m MI hardline cable, terminating in a 2-pin MIL-C-5015 connector.

These sensors feature ATEX approval, high shock survivability, high resolution and a large dynamic range option.

PCB Piezotronics also offers several differential charge amplifiers to support the two new sensors that convert the high impedance output to a low impedance voltage signal for transmission and data collection.

When paired with charge accelerometers, these charge amplifiers convert the sensor output into a single-ended output (measurement output as a signal and ground).


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