Campbell IRTS-P Instruction Manual - 3.  Installation

IRTS-P Precision Infrared Temperature Sensor 

2 

3.  Installation 

The field of view for infrared sensors is calculated based on the geometry of 

the sensor and lens.  However, optical and atmospheric scatter and unwanted 

reflections from outside the field of view may influence the measurement.  

Under typical conditions, 80 to 90 percent of the IR signal is from the field of 

view and 10 to 20 percent is from the area surrounding the field of view.  If the 

target surface is small, for example a single leaf, try to mount the sensor close 

enough that the surface extends beyond the field of view. 

To obtain the desired view of the canopy or surface of interest, the IRTS-P is 

often mounted separately from a met station tower. A hole threaded for a 

standard tripod camera mount screw (1/4 inch diameter; 20 threads per inch) 

can be used to mount the sensor to a user-supplied support.   

The IRTS-P can be mounted to a Campbell Scientific tripod or tower with the 

UT018 Crossarm (Figure 3-1.)  A mounting kit (Stainless steel bolt, 2 washers, 

and 2 nuts PN 14475) is included with the IRTS-P that can be used to attach 

the sensor to the crossarm (Figure 3-2.)  

FIGURE 3-1.  IRTS-P on UT018 Crossarm 

FIGURE 3-2.   Mounting IRTS-P to UT018 Crossarm 

Nut with two lock washers 

attaching bolt to the arm. 

Tighten against sensor to fix 

angle of sensor.