Dytran model 7705A1 Extended Low Frequency (ELF) accelerometer

Dytran Instruments has released a range of sensors that combines the two technologies of piezoelectric and DC response MEMS, packaged simultaneously in a single housing.

The Dytran model 7705A1 Extended Low Frequency (ELF) accelerometer combines piezoelectric and a variable capacitance MEMS element as a single output, to create wide frequency response bandwidth from DC (0 Hz) to 10 kHz. ELF technology combines the most wanted features of piezoelectric sensors (high frequency response) with those of variable capacitance accelerometers (true DC response), eliminating the need for two different technologies to cover the bandwidth of interest in an application. Slow rotation speeds in the sub-1 Hz range and gear mesh frequencies up to 10 kHz can now be made using the same sensor.

The accelerometer is offered with a 200 g range and operates on 5–28 VDC power at 7–9 mA of current. Signal/power is handled via a 4-pin M4.5 x 0.35 radial connector. The lightweight titanium housing weighs just 15 g and is hermetically sealed for use in rugged environments, from test tracks to outer space. It incorporates a 10–32 tapped mounting hole and a hex base.

The product is suitable for flight testing, ride quality, health and usage monitoring systems (HUMS), wind turbine measurements, machinery monitoring and a wide range of structural response applications.