▪ Possible presence of gas in the detector area.
Non-zero reading when no gas is present
▪ Detector needs calibration.
Reading too high or too low
Zero reading in presence of gas
▪ Wrong or defective electrical connection.
▪ Sintered or sensor blocked with dust.
▪ Sintered or sensor contaminated. Replace sin-
tered AND sensor.
4.5. Spare parts and accessories
Cable gland - Ex “d” M20 (6.1 - 11.7 mm)
Key for locking screw (1.5 mm hex key)
Screw - Locking screw of the junction box cover
Screw for locking the body of sensing head
Spanner for base of sensing head (30 mm)
Spanner for top of sensing head
Terminal block - Ex “e” 2 position
Transmitter board - 4-20 mA
* Depends on the type of sensor used
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