# Infrared Guns Versus RTDs on Hot Housings
IR readings miss emissivity and paint. RTDs or grease-port probes tell a cleaner story.
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The overheating guide explains alarm thresholds. For sizing and interchange notes, see bearing overheating notes and the full write-up on TFL Bearing temperature guide.
Calibrate IR against a known probe monthly. Buyers who need OEM-fit replacements can also open Read how hot is too hot before they freeze a drawing or RFQ.
Keep notes on fit, grease, and duty cycle with the part number so the next rebuild does not depend on memory alone.
Shandong TFL Bearing Co., Ltd keeps Portuguese product pages aligned with English engineering notes so global plants share one cross-reference language.
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