FOXWELL HT280 Thermal Imaging Camera 320x240 IR

The HT280 is the step up from an infrared thermometer: instead of one dot of temperature you get a 320x240 thermal image of the whole part, upscaled to 260x260 by the camera's TISR processing. On a transmission that matters, because the problem is almost never where the single-point gun happens to be aimed. A dragging clutch pack, a converter that is slipping instead of locking, a partly plugged cooler, or a collapsed cooler hose all show as a bright area against a cooler background, and you can see it standing back from a hot unit rather than reaching into it.

The checks that actually pay for the tool are quick. With the vehicle at operating temperature, shoot the cooler inlet and return lines at the radiator or auxiliary cooler: the return should be meaningfully cooler than the feed, and a narrow split between the two means flow is restricted and the fluid is not being cooled. Shoot the pan and the case at idle, then again after a road test, and watch how fast the unit climbs. On a slipping unit, compare the converter area to the tail housing. On an electrical fault, sweep the solenoid pack, the case connector, and the harness for a hot terminal that a meter reading alone will not point you to. The 25 Hz refresh means the picture keeps up while you pan across a unit instead of smearing.

Measurement range is -10 to 500 C (14 to 932 F) with accuracy of plus or minus 2 percent or 3.6 F, and sensitivity is 50 mK, so small differences across a case still separate on screen. The camera flags the hottest, coldest, and center temperature automatically, and a settable high/low alarm lets you scan a row of lines or connectors and let the camera call out the odd one. Nine palettes are available; Iron Red and White Hot are the practical choices for finding a hot spot on a dark case. Emissivity and distance are adjustable, which is worth setting before you trust a number off bare aluminum or a polished line.

Field of view is 50 by 50 degrees, wide enough to get a whole bellhousing or a cooler stack in one frame. The body is IP54 rated against dust and water and rated to a 6.6 ft drop. The built-in rechargeable battery runs about 8 hours continuous with selectable 5/10/30/60 minute auto-off. Images and video record to internal memory (over 20,000 images) and transfer by USB. The point, line, and area analysis software and the 2D/3D view are Windows only, so Mac users should plan on using the camera standalone, which it does fine.