RKI Instruments Beacon 200 Rig Monitor, LEL/H2S - Manual (Page 12)

7 • Beacon 200 Rig Monitor Operator’s Manual
to the interior of the junction box.
The combustible gas detector is a catalytic type detector that produces an
electrical output that corresponds to the detection range. It is packaged in a
1/2 inch NPT nipple with a sintered metal flame arrestor on one end
allowing ambient air to diffuse into the detector. The flame arrestor also
contains any sparks which may occur within the detector. The calibration
cup/splash guard is screwed onto the bottom of the detector.
H
2
S Detector Junction Box and Cable
The H
2
S detector consists of a junction box with a mounting bracket, the
detector, and the calibration cup/splash guard.
Cable Bushing
To Beacon 200
Mounting Bracket
H2S Detector
(Factory Wired)
Calibration Cup/
Splash Guard
Terminal Strip
Figure 3. H
2
S Junction Box Component Location