Miniature accelerometer specializes in
pyroshock and mechanical impacts
The Endevco® Model 7255A Pyrotron is a miniature, lightweight piezoelectric accelerometer with integral electronics, designed specifically for near-field pyroshock and high-level mechanical impact measurements, where unwanted high frequency signals often mask the desired low-level, low frequency information. The unit incorporates a uniquely designed built-in mechanical filter system to effectively block out high frequency input spikes, protecting the sensing element from overstress.The Model 7255A- 01 has a 50 000 g full scale output range and 300 000 g survivability. It is ideal for near-field, high-g measurement. For lower level shocks, a high output "-1" range (5000 g F.S.) is available.
The accelerometer incorporates an internal hybrid signal conditioner in a two-wire system which transmits its low impedance voltage output through the same cable that supplies the required constant current power. Signal ground is connected to the inner case of the unit which acts as a shield, and both the output and signal ground terminals are electrically isolated from the mounting
surface. The accelerometer features an integral 1/4-28 mounting stud and two solder-pin terminals for output connection. Small gage, lightweight hook-up wires are required for error-free operation. The model number suffix indicates acceleration sensitivity in mV/g; i.e., 7255A-01 features output sensitivity of 0.1 mV/g.
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