Thermal Imaging
Thermal Imagers vs. Infrared Thermometers
Both tools read surface temperature without contact, but they answer different questions. A thermal imager shows a heat picture of a whole area, so you can spot a hot breaker, a failing bearing, or missing insulation. An infrared thermometer reads one spot at a time. This collection has Klein TI220 (Android) and TI222 (iOS) phone imagers plus the rechargeable TI270 with Wi-Fi and TI290 Pro. For spot readings, choose Milwaukee 2267-20, 2268-20, and 2269-20 temperature guns, the M12 2278-20 Temp-Gun, or Klein IR1 and IR5 thermometers.
What to Look For
- Image or number. Choose an imager for scanning panels, ducts, and walls. Choose a thermometer for quick spot checks.
- Distance-to-spot ratio. A 30:1 gun like the 2269-20 reads small targets from farther away than a 10:1 model.
- Phone or standalone. TI220 and TI222 plug into a phone. TI270 and TI290 work on their own.
- Calibration paperwork. NST versions of Milwaukee guns suit jobs that require documented calibration.
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Thermal Imaging FAQ
Can an IR thermometer find hot spots like an imager?
Only if you already know where to aim. A thermometer averages the temperature inside its spot. An imager shows the whole scene, so problems you did not expect stand out.
Does it read through walls?
No. Thermal tools read surface temperature only. They can show temperature patterns on a wall surface caused by studs, leaks, or gaps in insulation behind it.