Kistler is a manufacturer of piezoelectic instrumentation for force, pressure, vibration and torque measurements. Accelerometers measure bridge and structure vibration and acoustic emission sensors monitor structure integrity levels. Kistler received ISO 9001 in 1994 and later ISO/IEN 17025. A unit of the Swiss based Kistler Group, instrumentation has been manufactured near Buffalo, New York for nearly 50 years. Products include sensors, sensor electronics, calibrators and system accessories.