 The Endevco Model 7221A is a small, piezoelectric accelerometer
designed specifically for general vibration measurement.
The accelerometer offers wide bandwidth and operational
temperature range, it is also hermetically sealed for
high reliability. Its light weight (10.5 gm) effectively
minimizes mass loading effects on small structures. This
accelerometer is a self-generating device that requires
no external power source for operation.
The Model 7221A features Endevco's Piezite® Type P-8
crystal element, operating in annular shear mode, which
exhibits low base strain sensitivity and excellent output
stability over time. Signal ground is connected to the
outer case of the unit. When used with an isolated mounting
screw, it is electrically isolated from ground. The centrally
located mounting bolt permits 360° cable orientation,
a very desirable feature in many applications. The supplied
low-noise coaxial cable is required for error-free operation.
Endevco Signal Conditioner Models 133, 2775A or VCAS™
are recommended for use with this high impedance accelerometer.
Features:
• Requires no external power
• 360° cable orientation
• Annular shear
• Hermetically sealed
• To +400°F (+204°C)
Endevco Model 7221A
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