65-2301RKSS Toxic Detector • 7
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 a 3/4 NPT hub. Two wires extend
from the top of the detector housing body. Use these wires to connect the toxic detector to a controller.
One of the wires is black and one of the wires is color coded depending on the detector type. See
Figure 4 on page 9 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.
Housing Cap, Cap Gasket, & Splashguard
The housing cap screws onto the detector housing. It retains the 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 produces an
electrical output that corresponds to the detection range of the sensor.
Junction Box
The stainless steel, corrosion resistant junction box allows you to install the detector at a mounting site
that is remote from a controller, and it protects the detector wiring connections. Two conduit hubs
allow you to mount the detector to the junction box and connect the wiring from the detector to a
controller. An O-ring seals the interface between the junction box cover and the junction box base.
The terminal block within the junction box facilitates the wiring process. A cover on the front of the
junction box allows access to the interior of the junction box. A locking set screw on the junction box
cover allows you to secure the junction box cover and prevent it from being removed.
Installation
This section describes procedures to mount the toxic detector in the monitoring environment and wire
the detector to a controller.
Mounting the Toxic Detector
1.
Select a mounting site that is representative of the monitoring environment. Consider the
following when you select the mounting site.
•
Select a site where the detector is not likely to be bumped or disturbed. Make sure there is
sufficient room to perform start-up, maintenance, and calibration procedures.
•
Select a site where the target gas is likely to be found first.
NOTE:
If your application does not require a specific mounting site, mount the detector at
approximately breathing level.
