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MEMS-based, High Amplitude 20,000g Shock Accelerometers Among the Industry's Smallest

Fri, 04/11/2008 - 12:31pm

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MEMS-based shock accelerometersThe Aerospace & Defense division of PCB Piezotronics (PCB) introduced its Series 3991 & 3993, a family of MEMS-based, miniature high amplitude 20,000 g shock accelerometers, which are among the industry’s smallest. These accelerometers are available in both single axis and triaxial configurations and 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, and is presented as a drop-in replacement for competitive models.  Each style shares the same air-damped acceleration sensing element, which is micromachined from silicon. This element measures 2.5 mm × 1.7 mm × 0.9 mm (l × w × h) incorporating a seismic mass, protective over range stops, and a full-active, piezoresistive Wheatstone bridge, which provides minimal zero shift, 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 percent damping capability on Model 3991A1020KG, for lower-noise, desirable data fidelity (clean signal) and phase accuracy, quick response, and near-field pyroshock measurement capabilities, models within Series 3991/3993 are intended for aerospace and defense requirements, as well as in 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.

PCB Piezotronics, Aerospace & Defense Division
888-684-0013, www.pcb.com

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