65-2422RK-05 H
2
S Transmitter • 7
H
2
S Detector
The H
2
S detector includes the detector housing body, detector housing cap, cap gasket, rubber
boot, spacer, and the plug-in H
2
S sensor.
Figure 2: H
2
S Detector Component Location
Detector Housing Body
The detector housing body protects the electronic components within the housing. Use the
mounting threads at the top of the housing to screw the H
2
S detector into the 3/4 NPT hub on
the bottom of the junction box. Two wires extend from the top of the detector housing body.
Use these wires to connect the H
2
S detector to the amplifier. One of the wires is red and one of
the wires is black.
The housing includes a four-socket pattern. This socket pattern accepts the sensor’s four pins
to secure the sensor within the detector housing. A pre-amplifier, located between the sockets
and two interconnect wires, conditions the sensor’s signal before the signal reaches the
controller.
Housing Cap & Cap Gasket
The housing cap screws onto the detector housing. It retains the plug-in sensor and protects it
from damage. The housing cap also includes a flame arrestor which contains any sparks that
may occur within the detector and a flame arrestor guard which protects the flame arrestor
from damage. Unscrew the detector cap to access the plug-in sensor for maintenance or
replacement. A cap gasket seals the interface between the housing and cap.
Rubber Boot and Spacer
A rubber boot and spacer are installed between the detector housing cap and the sensor. They
help ensure that the detector remains plugged into the detector housing body.
Spacer
Rubber Boot
H2S Plug-in Sensor
Flame
Arrestor
Guard
Detector
Housing Cap
Detector Housing Body
Cap Gasket
