Target size and distance are critical to accuracy for most IR thermometers
All PyroCAN sensors have precision silicon optics with a well-defined measurement area. The sensor measures the average temperature within the measured spot shown.
The wide-angle 2:1 optics of model PCAN21 provide a relatively large measurement area. They are ideal if the target is large, or the sensor is positioned very close to the measured surface.
The general-purpose 20:1 optics of model PCAN201 provide a small, precise measurement area.
Accessories for laser sighting are available, either to aid aiming during installation, or for continuous indication of the measurement area.
All models can measure at longer distances than shown, with a larger measured spot size.
Diagrams show the diameter of the measured target spot versus the distance from the sensing head. Given measured spot sizes contain 90% of the energy detected by the sensor. We recommend the target should be at least twice the size of the measured spot for maximum accuracy.
Please note: The given measured spot size contains 90% of the energy detected by the sensor. We normally recommend the target is at least twice as large as the given measured spot for maximum accuracy. Sensors may be used at longer distances than the above diagrams show. There is no maximum measurement distance in clean air; this is because the PyroCAN detects only the wavelengths of infrared radiation that are not absorbed by the atmosphere.