Prosense PQ Series Installation And User Manual page 13

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.
Prosense may provide cable gland together with detector in regards to customer requests.
The cable gland provided by Prosense has ATEX certification and provides at least IP65 level
protection. The cable glands are only suitable for fixed installations. Cable gland body should
be fixed to related entry with 20Nm torque. Cables shall be effectively clamped to prevent
pulling or twisting. To provide necessary protection cable gland coupling should be fixed
with 20Nm torque when used with three sealing; 18Nm when used with two sealing; 16Nm
when used with one sealing. It is the final assemblers'/users responsibility to ensure the
threaded joint between cable gland and the enclosure meet all the requirements of the
applicable standards for the assembly. Cable gland sealing are suitable for the circular type
cables. If other shaped cables will be used the sealing should be replaced with suitable ones.
The cable glands provided by Prosense are suitable to use temperature range in which
detector works.
Prosense may provide plugs and adaptors together with detector in regards to customer
requests. The plugs and adaptors provided by Prosense have ATEX certification and provide
at least IP65 level protection. These parts should be mounted to detector body in such a way
that accidental rotation or loosening will be prevented. Plug should be fixed to related entry
with 20Nm torque. It is the final assemblers'/users responsibility to ensure the threaded
joint between fitting and the enclosure meet all the requirements of the applicable
standards for the assembly. For adaptors and plugs with nominal size of thread equal or
lower than 25 mm aluminium alloy shall not be used. Only one adaptor permitted for each
cable entry; plugs shall not be used with adaptors. The plugs and adaptors provided by
Prosense are suitable to use temperature range in which detector works.
The user-supplied cable gland, plug and adaptor must be ATEX certified. Components that
do not have an ATEX certificate cannot be used.
PRS-UM-PQ-EN-Rev.05-18.06.2020
If temperature exceeds 70ºC at entry or 80ºC at branching point use
suitably rated cable and cable glands or conductors in conduit.
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