This may help:
Fluke IR temperature guns have different distance-to-spot (D:S) ratios depending on the model, ranging from 8:1 for general-purpose tools to 60:1 for high-temperature industrial units. A higher ratio allows for accurate measurements from further away, while lower ratios are designed for closer, smaller targets.
Common Fluke IR Gun Distance-to-Spot Ratios
Fluke 59 MAX: 8:1 (best for close-range, general maintenance).
Fluke 62 MAX: 10:1 (suitable for electrical panels and HVAC).
Fluke 64 MAX: 20:1 (offers better precision from a distance).
Fluke 566/568: 50:1 (ideal for higher, smaller targets).
Fluke 572-2: 60:1 (designed for long-distance, high-temperature industrial use).
The smaller the target, the closer you must be to ensure the sensor only reads the target, not the background.
Fluke IR temperature guns have different distance-to-spot (D:S) ratios depending on the model, ranging from 8:1 for general-purpose tools to 60:1 for high-temperature industrial units. A higher ratio allows for accurate measurements from further away, while lower ratios are designed for closer, smaller targets.
Common Fluke IR Gun Distance-to-Spot Ratios
Fluke 59 MAX: 8:1 (best for close-range, general maintenance).
Fluke 62 MAX: 10:1 (suitable for electrical panels and HVAC).
Fluke 64 MAX: 20:1 (offers better precision from a distance).
Fluke 566/568: 50:1 (ideal for higher, smaller targets).
Fluke 572-2: 60:1 (designed for long-distance, high-temperature industrial use).
The smaller the target, the closer you must be to ensure the sensor only reads the target, not the background.