Detcon 100 Duct Mount Kit - Manual (Page 3)

100 Duct Mount
100 Series Duct Mount Kit Rev. 0.1 Page 1 of 4
1.0 Introduction
The Detcon Sensor Duct Mount Kit for Model 100 gas detection sensors allows a Detcon Model 100 gas
sensor assembly to be mounted so that the Sample Chamber is located inside of an air duct, while the Sensor
Assembly, located outside the duct, is still accessible for calibration and other adjustments. This method of
installation is much more economical than the typical sample draw type system that is normally used in such
applications. This instruction manual explains the installation, calibration, and maintenance procedures of the
duct mount con-figuration. Refer to the sensor instruction manual for information on the sensor assembly.
1.1 Principal of Operation
In operation, air flow through the duct enters the duct mount chamber through ports facing the on coming flow
of air. Once inside the chamber the sample passes by the sensor and then exits through similar ports that face
the opposite direction. If any target gas is present in the chamber, the sensor output signals will respond
accordingly as described in the sensor assembly instruction manual.
Flow
Flow
Sample Chamber
Inside the DUCT
Sensor
Figure 1 Sample flow
2.0 Installation
1 - Cut a clearance hole in duct as shown below. Mounting remains the same for square or round ducts.
Minimum suggested diameter for round duct is 10 inches to adapt with normal mounting techniques. Adapting
to an 8” diameter duct is possible with special mounting techniques. Below 8” diameter is not practical for
mounting.
2 - Mount the duct mount kit using four 1/4” sheet metal bolts or other appropriate hardware.
3 - If necessary mounting integrity can be enhanced by using the two holes on the upper portion of the duct
mount plate. Use standoffs and 1/4” sheet metal bolts or other appropriate hardware.
4 - Perform installation wiring as described in the sensor assembly instruction manual. If conduit is used, use
flexible conduit to allow for future maintenance.
A ¼” foam gasket is available for mounting the assembly on a round or curved ducts. Contact Detcon for
further information. Mounting remains the sane.