1 PCB Piezotronics Ltd - Miniature high amplitude shock accelerometers

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Miniature high amplitude shock accelerometers

14 April 2008

The Aerospace & Defense division of PCB Piezotronics has announced the launch of Series 3991 & 3993, a family of MEMS-based, miniature high amplitude 20,000g shock accelerometers, which are among the industry’s smallest.

Series 3991 & 3993 MEMS-based miniature high amplitude shock accelerometers, available in both single axis and triaxial configurations, represent the state-of-the-art for miniature, high-amplitude, dc response acceleration sensors. They are capable of measuring long duration transient motion, as well as responding to and surviving extremely fast rise times, typical of a high-g shock event. Several configurations are offered to fulfill a variety of installation requirements, with a standard footprint that is a drop-in replacement for competitive models. Each style shares the same air-damped acceleration sensing element, which is micromachined from silicon using the latest advances in etching techniques. This tiny element measures just 2.5 x 1.7 x 0.9 mm (l x w x h) incorporating a seismic mass, protective over range stops, and a full-active, piezoresistive Wheatstone bridge, which provides minimal zero shift, very low power consumption and dc response capability.

Sensors also feature internal stops for large over-shock survivability, and high-strength, low-weight titanium housing, with integral very low-noise integral Kevlar cable. With 5% damping capability on Model 3991A1020KG, for lower-noise, better data fidelity (cleaner signal) and phase accuracy, quick response, and near-field pyroshock measurement capabilities, models within Series 3991/3993 are intended to fulfill demanding aerospace and defense requirements, as well as a wide assortment of product testing applications. Typical applications include fuze/safe and arm applications; penetrator tests; crash/impact testing; metal-to-metal impacts; drop testing; blast loading of structures; and consumer electronic products testing.


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