Installation of Sensing Heads
GP Series
Rev. F 10/2011
41
Figure 29: Proper Sensor Placement
4.5
Atmospheric Quality
It is important to keep the lens clean at all times. A clean lens can
prevent erroneous readings and possible lens damage. An Air Purge
Collar is available, and recommended, for all models to protect the
lens from smoke, fumes, dust, and other contaminants.
Sensor
best
critical
incorrect
Target greater
than spot size
Target equal to
spot size
Target smaller
than spot size
