Why is the sensor’s field of view (FOV) so important?
If the target object is smaller than the sensor’s FOV, the actual temperature sensed will be an average of that object and everything else in the FOV. This can affect the thermal contrast. By filling the field of view with as much of the target object as much as possible, you increase the thermal contrast leading to a more reliable output. Q: What do you mean by “thermal contrast?” A: It is the temperature difference between ambient temperature and the item to be sensed. High thermal contrast increases switching accuracy.
