Milwaukee 2258-21, M12 7.8KP Thermal Imager

CF Product Code: MIL225821

Manufacturer Part Number: 2258-21

UPC: 045242351930

12 Volt Thermal Imager is ideal for use by Electrical Contractors, HVAC/R Technicians, Building Inspectors, Energy Auditors and Plant Maintenance teams. It is also RESNET compliant.

Price: $ 639.76 / EA Legend
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Product Details For Milwaukee 2258-21

Product Description

He's a video of the Milwaukee M12 7.8kp thermal imager. Here it helps find the path the water took when this basement flooded. It shows the temperature differences. In this case the cold water. It's great for durability and price but it's definitely not a high end unit. This would be a great unit to send out with your crews or have for easy inspections. For us it's serves its purpose but I'd still like to purchase a higher end model for easier visibility.


The M12™ 7.8KP Thermal Imager is the first imager in its class to deliver outstanding 7,800+ pixel image detail for superior scanning than single-point infrared thermometers. Leverage Milwaukee® exclusive DUAL SENSE™ pixel technology to get crisp images of heat loss, electrical resistance, water damage and mechanical issues. On-screen temperature readout and 83:1 Distance-to-Spot ratio gives users precise, real-time measurements from a distance. Capture, store and share images using the included SD card and USB cable. Fully compatible with Milwaukee® Thermal Imager Reporting Software for archiving, analyzing and reporting.


  • 7,854 (102 x 77) pixel resolution captures highest resolution image in its class
  • DUAL SENSE™ pixels are ultra-responsive, adjusting individually to eliminate blurring of hot and cold details
  • Take measurements from long range or down to the detail with 83:1 Distance-to-Spot performance
  • Measure surface temperatures 14⁰F to 626⁰F degrees for images spanning wide ranges
  • 2-Stage trigger activates lasers for easy scanning or quickly captures images
  • Dual lasers frame on-screen temperature area
  • Multiple color palettes available: Rainbow, Grayscale and Ironbow
  • Automatically locates highest and lowest temperatures
  • Fully compatible with Milwaukee® Thermal Imager Reporting Software available at
  • Compatible with over 70+ M12™ tools


Sensor Resolution 7,854 pixels (102 x 77)
Temperature Range -10⁰C - 330⁰C (14⁰F-626⁰F)
Thermal Sensitivity 0.1°C at 30°C
Field of View 26.8 (Horiz) x 35.4 (Vert)
Distance to Spot Ratio 83:01:00
LCD Display 2.4" High-Resolution Color
Display Resolution 320 x 240 pixels
Laser Targeting Dual Lasers
Focus Method Fixed
Ranging Automatic
Color Palletes Iron, Rainbow, Gray
Reporting Software Fully Compatible with Milwaukee Tool Thermal Imaging Software (download)
Image File Formats .PNG, .DAT (Radiometric Data)
Data Storage SD Card up to 32 GB
Drop Test 6'
Run Time 10+ hrs
Tool Warranty 5 Years
Voltage 12V


  • (1) M12™ REDLITHIUM™ Battery (48-11-2401)
  • (1) M12™ Lithium-ion Battery Charger (48-59-2401)
  • (1) Protective Boot
  • (1) SD Card
  • (1) Soft Case
  • (1) USB Cable
  • (1) Manual

Frequently Asked Questions

Q: Relationship to 160 x120 Thermal Imager:
A: The 160 x 120 Thermal Imager will have more on-tool adjustments like manual focus and manual level and span. This tool is better suited for someone looking to make a lot of adjustments to manipulate images as needed.

Q: Where can I get the Thermal Imaging Software?
A: Software can be found online at for free under the product page.

Q: Is there be a –NIST version?
A: No, all units include a statement of calibration and are calibrated during the manufacturing process and are manufactured to ISO 9001 Standards

Q: What if a user need dated documentation or thinks there tool is not performing right?
A: Customers can request a conformance check on the tool for a fee through a Milwaukee Service Branch. They will receive documentation certifying its calibration.

Q: Why do the lasers appear to rotate?
A: The lasers constantly frame the borders of the measurement area displayed on-screen. In order to do this the lasers rotate around the area as you change distances.

Q: Is there anything I shouldn’t use a Thermal Imager on?
A: Glass, shiny metal are reflective to a thermal imager. If you stand in front of this material you will see your reflection of heat. Stand off to an angle if shooting something highly reflective. Also DO NOT point at the sun.

Q: How many images can the SD Card hold and what sizes are compatible?
A: The 8GB SD Card will store thousands of images and is compatible with up to 32GB’s

Q: How small of an object can I see with it?
A: A single pixel sees a 1ft x 1ft object at 151 feet.

Q: What is the warranty?
A: 5 Year warranty

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Shipping Info

Weight: 4.1 lbs

Length: 17 in.

Width: 10 in.

Height: 11 in.