Dytran Instruments (Chatsworth, CA) has introduced the model 3091A, an IEPE accelerometer. It is offered with a range of 500g, 100 mV/g sensitivity, and an upper frequency response of 1,000 Hz (±5%). As an IEPE sensor, the accelerometer features built-in electronics, eliminating the need for an external charge amplifier and converter. Design of the device features a quartz sensing element operating in shear mode and packaged in a rugged stainless steel housing with a radial 3-pin “Mighty Mouse” connector. The unit’s sensor element is incorporated directly into the mounting bracket, eliminating costs associated with separate mounting brackets. The unit is hermetically sealed for use in dirty and high-humidity environments, and is case-isolated to avoid EMI/ground loop interference. It is suitable for high-frequency aircraft/airframe vibration measurements, Rotor Track and Balance (RTB), and transmission vibration measurements.
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