Meggitt Introduces Endevco Miniature Accelerometers

By DE Editors

Meggitt Sensing Systems has introduced the Endevco model 256 series, a family of miniature piezoelectric accelerometers with integral electronics, designed for modal and structural analysis and general vibration measurements on smaller structures and objects, as well as HALT/HASS/ESS; shaker testing; package integrity testing; wind turbine vibration measurements; satellite ground testing; medical device testing; vehicle modal and structural analysis; and automotive component durability testing.

The model 256 series is offered in choice of adhesive (256) or thread mounted (256HX) versions, with available sensitivities of 10 mV/g ( ±500 g range) and 100 mV/g ( ±50 g range), both with milli-g resolution. Its lightweight (3.5 gm) design effectively minimizes mass loading. The accelerometers incorporate the use of Meggitts own proprietary piezoelectric crystal sensing element, operating in annular shear mode,  which provides highly stable output sensitivity over time, excellent frequency response and low base strain, for exceptional thermal transient stability. In addition, this series uses a built-in low-noise microelectronic amplifier which transmits its low-impedance voltage output through the same two-conductor cable that supplies required constant current power. A dielectric layer isolates case ground from the mounting surface. The hermetically sealed top connector and welded housing provide long-term reliability, even in harsh, corrosive or higher humidity conditions.

Mounting wax and the model 3061A-120, a 10-foot cable assembly with temperature rating to +177 °C (+350 °F), featuring a male 10-32 miniature coax connector at one end and a male BNC at the other, are both supplied with the units.  Optional accessories, sold separately,  include the Endevco model 133 three-channel piezoelectric signal conditioner; the model 2775B signal conditioner; the model 2793 16-channel signal conditioner; the model 4416B low-noise battery powered signal conditioner; the model 4999 16-channel low-pass filter signal conditioner; the model 6634C vibration amplifier; and the model 4990a (Oasis) modular rack-mounted signal conditioner.  

For more information, visit Meggitt Sensing Sytems.

Sources: Press materials received from the company and additional information gleaned from the company’s website.