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What should I do when batteries need to be replaced in infrared thermometers?

Check the polarity on your batteries to make sure they are installed according to the diagrams in the battery compartment. Also make sure that you are using a new good quality alkaline battery for infrared thermometers.

Other frequently asked questions:
What should I do when batteries need to be replaced in infrared thermometers?
Will infrared sensors measure air?
Do infrared thermometers measure water or ice?
How does infrared work?