Dimensions; Figure 2: Spot Size Chart; Figure 3: Dimensions Of Endurance® Sensor; Figure 4: Dimensions Of Endurance® Sensor In Air/Water-Cooled Housing Option - Fluke endurance series User Manual

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For 1-color temperature measurements make sure the target completely fills the measurement
spot. The target spot size for a properly focused target with the given distance to the target can
be determined by using the following formula under Figure 2.
Divide the distance (D, in Figure 2) by the D:S specification to get the target spot size.
The spot size calculated using this method is valid only at the focus distance.
Spot sizes out of focus distances will vary from the rule.

3.5. Dimensions

The following illustrations shows the dimensions of an Endurance® sensor, see Figure 3. An
Endurance® sensor installed in the air/water-cooled housing option, see Figure 4.
Figure 4: Dimensions of Endurance® Sensor in Air/Water-Cooled Housing Option
Innovative High Temperature Infrared Pyrometers

Figure 2: Spot Size Chart

Figure 3: Dimensions of Endurance® Sensor
D = Distance
S = Spot
size
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