Model CXT-IR
CXT-IR Instruction Manual
Rev. 2.1
Page 11 of 48
Density
Placement of sensors relative to the density of the target gas should be located within 4 feet of grade as heavy
gases tend to settle in low lying areas. For gases lighter than air, sensor placement should be 4 to 8 feet above
grade in open areas or in pitched areas of enclosed spaces.
Leak Sources
The most probable leak sources within an industrial process include flanges, valves, and tubing connections of
the sealed type where seals may either fail or wear. Other leak sources are best determined by facility engineers
with experience in similar processes.
Ventilation
Normal ventilation or prevailing wind conditions can dictate efficient location of gas sensors in a manner where
the migration of gas clouds is quickly detected.
Personnel Exposure
The undetected migration of gas clouds should not be allowed to approach concentrated personnel areas such as
control rooms, maintenance or warehouse buildings. A more general and applicable sensor location is combining
leak source and perimeter protection in the best possible configuration.
Maintenance Access
Consideration should be given to providing easy access for maintenance personnel and the consequences of
close proximity to contaminants that may foul the sensor prematurely.
NOTE:
In all installations the gas sensor should point straight down (refer to Figure 12).
Improper sensor orientation may result in false readings and permanent sensor damage.
Placement of RF Antenna
Placement of the sensor should have consideration made for line of sight RF transmissions. The devices should
be placed in a reasonable proximity to other devices in the network. Obstacles between CXT transceivers can
impact RF line-of-sight and may result in communication problems. The CXT sensor should be in view of at
least one other transceiver.
Additional Placement Considerations
The sensor should not be positioned where it may be sprayed or coated with surface contaminating substances.
Painting sensor assemblies is prohibited.
Although the sensor is designed to be RFI resistant, it should not be mounted in close proximity to high-powered
radio transmitters or similar RFI generating equipment.
When possible mount in an area void of high wind, accumulating dust, rain, or splashing from hose spray, direct
steam releases, and continuous vibration. If the sensor cannot be mounted away from these conditions then make
sure the Detcon Harsh Location Dust Guard accessory is used.
Do not mount in locations where temperatures will exceed the operating temperature limits of the sensor. Where
direct sunlight leads to exceeding the high temperature-operating limit, use a sunshade to help reduce
temperature.
