San Juan Capistrano, Calif. Endevco Corp. says it has introduced the industry's lowest noise compact seismic accelerometer that is 70 percent lighter than traditional IEPE accelerometers. The model 87 is designed specifically for measuring ultra-low-level seismic events and low-frequency vibration on structures and objects.
The model 87 is said to deliver the industry's best signal-to-noise in a compact seismic accelerometer thanks to state-of-the-art integrated electronics. In addition, at six ounces, the device is 70% lighter than traditional IEPE seismic accelerometers. It is hermetically sealed against environmental contamination, available in 1 V/g or 10 V/g sensitivity, and provides near-dc frequency response (flat to 0.05 Hz).
The model 87 incorporates an advanced ultra-low-noise hybrid circuit operating in a constant current mode. A two-wire system transmits low-impedance voltage output and required power. Signal ground is electronically isolated from the outer case and mounting surface to prevent ground loops. A specially designed cable assembly is available as an optional accessory.
Other features include a full scale output voltage of 5 V, overload protection to 400 gs, and a low impedance output at <10 ohms. Packaged in a stainless steel case with a top mounted 2-pin connector, the model 87 is housed in a 1.175-inch diameter hexagonal configuration with a height of 1.571-inch not including the connector (2.221-inch height including the connector). The operating temperature range is -4°F to 212°F.
Endevco Corp., 1-800-982-6732, www.endevco.com