RKI Instruments 65-2515RK - Manual (Page 6)

2 • 65-2515RK Oxygen Detector
Description
This section describes the components of the 65-2515RK. It consists of the oxygen detector
and the junction box
Oxygen Detector
The oxygen detector consists of the detector housing and the plug-in sensor.
Figure 1: Oxygen Detector Component Location
Detector Housing
The detector housing protects the sensing components within the housing. Use the
mounting threads at the top of the housing to screw the oxygen detector into the bottom
conduit hub of the junction box. Use the removable cap near the bottom of the housing to
access the sensor for maintenance or replacement. The cap protects the sensor from
damage and includes a flame arrestor which contains any sparks that may occur within
the detector housing. A cap gasket seals the interface between the housing body and cap.
The flame arrestor guard protects the flame arrestor from impact damage and is
permanently bonded to the cap.
Two color coded wires extend from the top of the detector housing. Use these wires to
connect the oxygen detector to a controller via the terminal block in the junction box. The
detector housing includes two sockets installed on a circuit board. These sockets accept
the plug-in sensor’s two pins to secure the sensor within the detector housing. The circuit
board with the sockets conditions the sensor’s signal before it exits the detector housing
via the two color coded wires.
Plug-In Sensor
The plug-in sensor plugs into a circuit board in the detector housing with two pins and is
retained by the cap. Through a series of chemical and electrical reactions, the sensor
produces an electrical output that is proportional to the detection range of the oxygen
detector.
Detector
Housing Body
Cap Gasket
Detector Housing
Cap
Flame Arrestor
Guard
Oxygen Sensor