65-2331-04 H
2
S Transmitter • 3
H
2
S Detector
The H
2
S detector consists of the detector housing body, detector housing cap, cap gasket,
rubber boot, spacer, and the plug-in 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 detector 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 terminal strip.
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 amplifier.
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.
Cap Gasket
Detector Housing Body
Detector
Housing Cap
Flame
Arrestor
Guard
H2S Plug-in Sensor
Rubber Boot
Spacer
