 The Endevco Model 7270A series of piezoresistive accelerometers
are rugged undamped units designed for shock measurements.
Endevco micro-machines the sensing system of the 7270A
fro a single piece of silicon. This etched silicon chip
includes the inertial mass and strain gauges arranged
in an active four-arm Wheatstone bridge circuit complete
with a novel on-chip zero balance network.
The low mass, extremely small size and unique construction
of the element blends an exceptionally high resonance
frequency with characteristics such as low impedance,
high overrange, and zero damping for no phase shift. The
high resonance frequency of these sensors permits their
survival in the presence of these high frequency components
in a shock pulse that could shatter the seismic system
of accelerometers having lower resonance.
High resonance frequencies and zero damping also allow
the accelerometers to respond accurately to fast rise
time, short duration shock motion. With a frequency response
extending down to dc or steady state accelerations, these
transducers are ideal for measurement of long duration
transients.
Model 7270A-XXM4, with integral 1/4-28 mounting stud,
is available on special order.
Endevco Model 136 Three-Channel System, Model 4430A or
Model 68207 BCAS™ Computer Controlled System are
recommended as signal conditioner and power supply.
Features:
• 2,000 to 200,000 g full scale
• High resonance frequency
• DC response
• Rugged, undamped
Endevco Model 7270A
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