STATUS SCIENTIFIC CONTROLS
Installation, Commissioning & Routine Gas Testing
FGD4 Gas Detector
TD19/001
Issue:
5
Change Note:
1869
Page 7
3.
D
ESCRIPTION
The FGD4 is a fixed gas detector for use in non-explosive atmospheres.
The unit comprises an instrument housing having one cable gland entry.
The housing containing the gas sensor has an M27 thread and is screwed
into the bottom of the unit. The sensor housing itself is a certified component
and must not be removed in service.
The main electrical features of the unit are:-
•
Power supply
– 8 to 24 volts dc (non-intrinsically safe)
•
Loop powered 4 to 20mA dc
•
Gland entry threads available
– 20mm, ½” or ¾” NPT
3.1.
Gas types
Versions of the FGD4 Oxygen Toxic are available for detection of gases,
fitted with any of the following sensor types:-
•
O
2
, H
2
S, CO, SO
2
and CO
2
