The IMI Sensors Division of PCB Piezotronics (PCB®) has received CSA
hazardous area approval for the new Model 685B0001C14 electronic vibration switch. The certification includes
Class I, Division 1, Groups B, C & D; and Class II, Division 1, Groups E, F, & G.
This approval allows for implementation of the Series 685B dual alarm electronic vibration switch into hazardous
rated environments for reliable continuous vibration monitoring and shutdown protection. The switch offers
variable time delays, dual 10 amp form C relays, and dual NPT openings for ease of installation. As offered on
all standard models, the switch also features a 4-20 mA output proportional to the measurement range; as well
as the raw vibration signal from the integral accelerometer, for system diagnostics and spectrum analysis.
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