Milwaukee
Milwaukee Tool M12 12:1 Infrared Temp-Gun
- SKU:
- MLW2278-20
- Availability:
- Usually Ships Same Day
- Weight:
- 0.92 LBS
Description

DUTY®
M12 12:1
Infrared Temp-Gun
A non-contact surface-temperature instrument with a fixed emissivity and configurable alerts.
Product Overview
This M12 infrared Temp-Gun reads surface temperature without contact. A clear LCD and controls support repeated scanning.
Set high and low alerts for readings outside your chosen range. Use reading modes to compare temperatures across the task.
- 12:1 opticsMeasures a defined spot at a distance.
- Surface readingsNon-contact temperature measurement.
- Configurable alertsHigh and low thresholds aid scanning.
- Reading modesHold, max, min, average and difference.
Technical Specifications
- Battery system
- M12
- Temperature range
- −22 to 1,022°F
- Distance-to-spot
- 12:1
- Emissivity
- Fixed 0.95
- Display resolution
- 0.1°F / 0.1°C
- Display type
- LCD
Choose the Correct Fit
Use the instrument for surface-temperature checks. At a 12 ft distance, the 12:1 ratio corresponds to a 1 ft measurement spot; ensure the target fills it.
The emissivity is fixed at 0.95, so target material and surface condition matter. Set high and low alerts for the task and follow the measurement procedure.
Installation & Care
Remove the battery before cleaning. Keep the sensor window and LCD free of contamination, and protect the instrument from impacts during transport.
Do not point the aiming laser at eyes. A surface reading is not an internal temperature measurement; verify the method is suitable for the application.
Small Details. Big Jobsite Energy.
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Ask Willy:
Need help choosing lighting or inspection equipment? Share model 2278-20, your power source and the work you need to complete.
Important Product Questions
What does the 12:1 ratio mean?
Milwaukee explains that the instrument measures a 1 foot spot from 12 feet away. Closer placement gives a smaller measurement area.
Can the emissivity be adjusted?
No. This model has a fixed emissivity of 0.95. Follow the manual’s guidance for the target surface rather than assuming every material reads identically.
Does it measure temperature inside an object?
No. It is an infrared surface-temperature instrument. Use an appropriate method when internal temperature is required.