Bullard T4X Thermal Imager

1040° F

1040° F

914° F 842° F

914° F 842° F

Low Gain

320° F 297° F 275° F

320° F 297° F 275° F

High Gain

Non-Bullard Thermal Imager

Yellow could mean 300°F or 900°F. Is the room getting hotter or cooler? Multiple color ranges can be confusing.