Shocking Measurements

New accelerometer survives shocks up to 1.5 times its range

Posted on October 7, 2013

Meggitt Sensing Systems, a Meggitt group division specializing in sensing and monitoring systems for extreme environments, has announced its Endevco model 727.

The Endevco 727 is a lightweight piezoresistive accelerometer designed for accurate shock measurement during drop testing of consumer electronic devices, among other shock and impact testing environments. Available in four ranges (2 kg, 6 kg, 20 kg and 60 kg), the model 727 can measure shocks in g ranges well above current drop test sensors, the company said.

The Endevco model 727 offers frequency responses – from DC to 10 kHz for the 2 kg range and up to DC to 100 kHz for the 60 kg range – to capture the entire frequency range of interest, Meggitt said.

In addition, it has been tested and rated to survive shocks up to 1.5 times its range. At only 0.3 g for the accelerometer body and 1.1 g per 0.3 m for the integral 3.05 m cable, mass loading to the test object is minimal. Its 0.7 cm diameter, anodized aluminum package is designed for adhesive mounting. The standard unit comes with an A2LA-certified calibration taken at 10 V (other input voltages should be specified at time of order). 

The Endevco model 42894 removal tool is included with each unit. Recommended signal conditioning for use with the model 727 includes the model 126 three-channel DC bridge amplifier, the model 136 three-channel signal conditioner and the model 436 DC differential voltage amplifier.

All sensing elements are manufactured in-house at Meggitt’s ISO9001-certified MEMS facility in Sunnyvale, California, U.S.A. In addition, the Endevco model 727 is covered by a five-year comprehensive product warranty.