Wenesco
EX series Intrinsically safe hot plates are specifically designed to
operate in Class 1, Division 1 &
2 conditions
When related to hot
plates, intrinsic safety means that oxygen in the hot plate housing is
held to such a low level that a mixture of flammable or combustible
material cannot ignite, either during normal operation or under fault
conditions.

Model HP86EX
Each features a nitrogen inerting
system that the sealed hot plate purged with
nitrogen. If nitrogen pressure is lost, an
accurate pressure sensor shuts down the heating elements.
The
device is controlled from a remote digital
thermostat which displays set point and current temperature in F or C.
This thermostat features PID function to limit temperature variation to
2% of set point. An adjustable
high-limit setting with manual restart is included. Note:
the thermostat enclosure must be placed in a “safe zone” -- out of the
hazardous environment.
The hot plate
assembly consists of an anodized aluminum plate mounted on a stainless
steel housing. The heating elements are mounted to the bottom of the
plate. The elements and wiring are enclosed in the housing, which is
finally sealed with high temperature cement.