Kistler Introduces MEMS Capacitive Accelerometers

Kistler Instruments has introduced a series of single-axis MEMS capacitive accelerometers for applications including low-frequency aerospace ground vibration testing and structural dynamics. The Type 8315A series accelerometers, which use Kistler's K-Beam technology, are also suitable for wind tunnel vibration analysis, automotive testing, vehicle road testing, ride assessments and human motion studies. The new series is made up of six models with measurement ranges from +/-2g to +/-200g with a frequency response of zero to 1,000Hz (five per cent) in a compact design with a footprint of only 25.4mm.

The MEMS variable capacitance sensing element consists of a small inertial mass located between two parallel plates. Deflection of the inertial mass under acceleration causes a proportional change in the capacitance of the sensing element. An integrated analogue signal conditioner converts this change to a proportional voltage output. Thanks to the good thermal stability of the MEMS construction, the accelerometers can operate from -55C to +125C. Three housings are available: one lightweight, environmentally sealed, hard anodised housing with integral ground isolation; and two welded titanium housings with either an industry-standard four-pin connector or a Teflon-coated cable.

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