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Detector Body
The detector enclosure has two threaded entries. One is at upper part of the transmitter
housing are for connecting the power source, signal output and relay contacts to associated
signalling equipment. The bottom entry allows direct connection of the sensor socket. There
are three special screw locations to mount detector to wall. The detector body dimensions are
given in Diagram 2.
Sensor Head:
The Prosense sensor head designed to detect flammable, toxic and oxygen gases. Sensor head
may include electro catalytic or electrochemical sensors. PC3 Series uses SH20 sensor head
Installation:
and components are given in Diagram 1.
Gas detectors should be mounted where a potential hazard of gas is most likely to be present.
The following points should be noted when locating gas sensors.
• When locating detectors consider the possible damage caused by natural events e.g.
rain or flooding.
• Consider ease of access to the gas detector for functional testing and servicing.
• Consider how escaping gas may behave due to natural or forced air currents.
Note: The placement of gas detectors should be determined following the advice of experts
having specialist knowledge of gas dispersion, experts having knowledge of the process plant
system and equipment involved safety and engineering personnel. The agreement reached
on the location of detectors should be recorded.
PRS-UM-PC3-EN-Rev.04-06.2020
Diagram 2: Detector body dimensions
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