QIRF Operation And Maintenance Manual
QIRF Operation Manual
May. 01, 2012
85050-301-000 Rev C
7
2. Installation
2.1 Sensor Location
Several factors should be considered when selecting locations to install sensors. The
following general suggestions should be considered to assure the detection of the target
gas. Select the most suitable location for each sensor.
1. Air Currents: If there are fans, winds, or others sources of air movement, gases may
tend to rise or collect in certain areas of a facility. The local air currents should be
assessed to aid in selecting the sensor location. In outdoor situations considerations such
as prevailing winds should be accounted for. Air convection can often be more important
in determining gas concentrated areas than factors of Vapor Density.
2. Vapor Density: R11, R22, R123 and R134A are heavier than air. Detecting location
should be 9 - 18 inch (0.23m to 0.46m) above the floor.
3. Gas Emission Sources: As a rule, at least one sensor should be located in close
proximity to each point where a leak is likely to occur. This is particularly important
when a liquid having a low volatility is monitored.
4. Environmental Factors: Designed to rugged outdoor use consider the following in
selecting locations. Install sensors where they will be protected from wind, dust, snow,
water, vibration and shock.
2.2 Physical Dimensions
