PCB Piezotronics’ 686B01 series
vibration switch has been ATEX
approved for use in hazardous
environments. The EX686B01 is
suitable for 24/7 continuous
protection of cooling tower fans and
gearboxes, fin fans, motors and
pumps, HVAC systems, wind
turbines and other critical machinery
operated in hazardous areas.

Meeting ATEX Ex nL IIC T3
approval requirements for use in
hazardous environments, the
EX686B01 is hermetically sealed and
mounts with a single stud like a
sensor. This smart vibration switch
includes an embedded piezoelectric
accelerometer for accurate
measurement and monitors vibration
velocity for consistent results.

It also offers a remote reset
capability and USB programmable
alarm threshold, and time delays to
avoid false trips.