65-2340RK Toxic Gas Transmitter • 7
Toxic Detector
The toxic detector consists of the detector housing body, detector housing cap, splashguard,
cap gasket, and the plug-in sensor.
Figure 2: Toxic 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 toxic 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 toxic detector to the amplifier. One of the wires is black and
one of the wires is color coded depending on the detector type. See Figure 5 on page 12 for the
color code assignments.
The housing body includes a 12 position connector at the bottom of the housing body. The
plug-in sensor mates to this connector. A pre-amplifier located between the connector and the
two interconnect wires conditions the sensor’s signal before the signal reaches the controller.
Each plug-in sensor type (Cl
2
for example) requires a different pre-amplifier, so there is a
different detector housing body for each gas type.
Housing Cap, Cap Gasket, & Splashguard
The housing cap screws onto the detector housing. It retains the plug-in sensor and protects it
from damage. A removable splashguard is screwed onto the detector cap to protect the sensor
from impact damage, direct water spray, and splashing. Unscrew the detector cap to access the
sensor for maintenance or replacement. A cap gasket seals the interface between the housing
and cap.
Plug-In Sensor
The plug-in sensor is secured in the detector assembly by the housing cap. There is a different
sensor for each target gas. Through a series of chemical and electrical reactions, the sensor
Splash Guard
(removable)
Sensor
(different for each detector type)
Detector Housing
Cap
Cap Gasket
Detector Housing Body
(different for each detector type)
