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PRS-UM-BTN-EN-Rev02-02.2019
Diagram 2: Detector Body and Sensor Head Size
Sensor Head
The Prosense BTN series sensor head designed to dedect flammable and toxic gases. Sensor
head may include electrocatalytic technologies or a wide range of toxic gas sensors based on
electrochemical cell (ECC) technology.
Installation
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.
Each gas has different nature depending on their density. The density of which is lower than
air, such as hydrogen, methane or ammonia the sensor head must be located above a possible
leak or at the highest points at which major concentrations of gas may be found. The gases
and vapours with a density greater than air, the sensor head must be installed beneath a
possible leak or at the lowest points at which such gases and vapours may be present. The
density of which is higher than air the sensor head must be located where gas accumulate.
