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Accelerometers reduce monitoring/control costs

A Bruel and Kjaer product story
Edited by the Engineeringtalk editorial team Mar 20, 2001

Endevco has expanded its Piezopak low cost accelerometer family for the commercial and industrial OEM engineering sectors.

Endevco has expanded its Piezopak low cost accelerometer family serving the needs of the commercial and industrial OEM engineering sectors.

Designed with efficient manufacturing in mind, the Piezopak platform offers the reliability and performance of piezoelectric (PE) crystal technology at prices previously only associated with large-scale silicon manufacturers.

The design of Piezopak delivers exceptional performance, low cost and unprecedented flexibility.

Combining Endevco's proven high volume PE production capabilities and dynamic instrumentation expertise, the Piezopak offers engineers a broader range of low cost measurement solutions.

Current production capacity of over one million sensors per year enables Endevco to provide attractive pricing and availability for OEM volume orders.

Three accelerometers are now available in the Piezopak family, models 55, 55L and the new 56.

All are low cost PE sensors designed specifically to provide high performance integrated vibration measurement on machines, structures and vehicles.

As low impedance PE devices, these accelerometers offer wide frequency response, high shock survivability and low noise.

They are sealed against environmental contamination, shielded, ground isolated and configured with five solder pads for power and signal connection.

These small (20.3 x 15.2 x 5.3mm) Piezopak accelerometers can also be packaged in custom housings allowing for particular cable/connector options.

Both the model 55 and 55L units feature a PE crystal element operating into an internal hybrid signal conditioner.

Signal ground is connected to the cover and an internal shield.

Model 55 requires an external power supply within the range 3 to 36V DC while model 55L's requirements are 2.7 to 5.5V DC.

Output bias and the peak linear output signal are 49 and 48% respectively of the supply voltage for model 55 (48 and 46% respectively for 55L).

The new model 56 is powered by 2 to 10mA constant current, requiring a compliance voltage of +10V to + 20VDC.

10mV/g and 100mV/g sensitivities are available providing full-scale measurement ranges of 200g and 20g respectively.

An optional temperature sensor with a linear output of 10mV/C is available for all three devices, requiring a separate power supply from 4.5 to 10V DC.

At 0C, the unit has a +500mV bias.

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