High-temperature accelerometer

  • 04-Feb-2009 12:28 EST

Bruel & Kjaer d­esigns an accelerometer capable of continuous operation up to 180°C (356°F). Until now, accelerometers designed for use with a constant current power supply have been limited to a maximum temperature of 120-125°C (248-257°F). The ThetaShear1 accelerometer type 4526 design provides low susceptibility to temperature transients. Two versions of the accelerometer are available: the 4526, which features 100 mV/g sensitivity, and the 4526-001, which offers a sensitivity of 10 mV/g. ThetaShear1 consists of a central mass and two piezoelectric elements that undergo a shear deformation when the accelerometer is subjected to a mechanical vibration along its main axis. DeltaTron2 identifies products that operate with a constant-current power supply and give output signals in the form of voltage modulation on the power supply line. The 4526 is suitable for automotive engine and exhaust systems and gas turbine auxiliary equipment.

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