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Accelerometers offer low-freq shock measurement

Posted: 09 Apr 2012     Print Version  Bookmark and Share

Keywords:accelerometer  piezoresistive  shock measurement 

Meggitt Sensing Systems unveils the Endevco model 7265A series of low mass piezoresistive shock accelerometers, weighing just six grams, designed to support low-frequency shock measurement requirements.

7265A series

The high-reliability design of the Endevco model incorporates the use of two MEMS gages (gauges) in a full active bridge circuit configuration with two fixed resistors for shunt calibration.

The devices are suitable for aircraft flutter testing, biomedical motion studies, road load data acquisition (RLDA) and other applications in which minimal mass loading and a broad frequency response are required.

The series is offered in two versions: model 7265A, with a 5mV/g sensitivity and a full-scale range of 100g; and the model 7265A-HS, offered with a high sensitivity of up to 25mV/g and a 20g full-scale range. Their high-reliability design incorporates the use of two MEMS gages (gauges) in a full active bridge circuit configuration with two fixed resistors for shunt calibration. In addition, viscous damping is included to extend transducer useful high-frequency range and reduce the effects of spurious high-frequency excitation.

The configuration provides a 500mV full scale low-impedance output with 10VDC excitation. Integral mechanical stops are also included to further prevent damage when the transducer is subjected to over-range shock.

Recommended accessories for the Endevco model 7265A series include the model 136 three-channel or model 4430A signal conditioner, or the model 4990A (Oasis) signal conditioner and power supply. In addition, each Endevco sensor is accompanied by a comprehensive five-year product line warranty. Quantities of the 7265A series are also available for immediate customer shipment.





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