Dytran Series 3493A miniature IEPE triaxial accelerometer

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Dytran Instruments has announced the release of the Series 3493A ultraminiature, low-noise, IEPE triaxial accelerometer.

The series is characterised by its miniature size (0.76 x 0.61 x 0.66 cm), allowing it to be mounted in spaces that are inaccessible to other types of triaxial accelerometers. It utilises a J-FET amplifier, demonstrating what is said to be a lower noise floor (and therefore better resolution) than MOSFET-based IEPE devices. An improved signal-to-noise ratio makes it suitable for applications where low vibration amplitudes are being measured and maximum resolution is required.

In each of the three orthogonal axes, the instrument generates a voltage proportional to vibration by stressing a ‘planar shear’ type, self-generating crystal element structure inside the sensor housing. The product has low mass and high crystal stiffness, which allows the accelerometer to have a resonant frequency greater than 30 kHz. As a result, it can be used to measure high-frequency vibration with little error.

The product is packaged in a titanium case and weighs only 0.9 g. Models are available in two sensitivities (5 and 10 mV/g) and are installed using adhesives or mounting wax. The series features an integral multiconductor, shielded cable design terminated with a 4-pin, ¼-28 threaded connector designed to mate with several models of extension cables for connection to IEPE power sources.

Typical uses include the following test applications: shock and vibration testing of small lightweight specimens (such as printed circuit boards); product response testing; modal and structural analysis; general-purpose triaxial vibration testing; and more.