Triaxial Variable Capacitance Accelerometers with Piezoresistive Electrical Interface, 7603B Series

October 23, 2013 - Chatsworth, California, USA - Dytran Instruments, Inc. ( a leading manufacturer of piezoelectric and DC MEMS accelerometers, force and pressure transducers and associated electronics, has expanded their line of high performance, variable capacitance (VC) accelerometers with the 7603B series, a family of triaxial DC response accelerometers, designed to replace piezoresistive units in new or existing applications.


The 7603B series accelerometers utilize a capacitve sensing element and an advanced ASIC to simulate the operation of a piezoresistive bridge. It combines an integrated VC accelerometer chip with high drive, low impedance buffering for measuring acceleration in aerospace, automotive, commercial and industrial environments.


These accelerometers are tailored for zero-to-medium frequency instrumentation applications and contain hermetically sealed micro-machined capacitive sensing elements, a custom integrated circuit amplifier, and differential output stages. Its hermetically sealed titanium case incorporates a 9-pin 5/16-32 radial connector and a 10-32 mounting hole (model 6204 mounting stud supplied).


On-board regulation is provided to minimize the effects of supply voltage variation. It is relatively insensitive to temperature changes and thermal gradients. The cable shield is electrically connected to the titanium case, and the power and signal wires are isolated from the case.


The unique benefit of the 7603B series is that while they utilize variable capacitance technology, they are powered with the same power supply as piezoresistive and strain gage sensors. These units can also operate as standalone VC accelerometers with differential output or be used in place of piezoresistive, bridge-type accelerometers.


The 7603B series of triaxial accelerometers responds to both DC and AC acceleration. Typical applications in which they can be used include airbag testing, crash testing, ride quality, aerospace ground testing, flight testing and seismic monitoring.


For more information about the 7603B Series or other products available from Dytran, or to order online, visit