Which instrument is good for checking overheating in bearings?

Using a thermometer to check for overheating in bearings is an effective choice because it enables the measurement of temperature directly. Bearings can heat up due to friction, inadequate lubrication, or other factors, and monitoring their temperature is critical for maintaining operational efficiency and preventing damage. A thermometer can provide real-time readings and help identify when temperatures exceed safe operating conditions, allowing for timely maintenance or adjustments.

Other instruments such as a multimeter, pressure gauge, and voltmeter do not directly assess temperature. A multimeter measures electrical parameters, a pressure gauge is used for measuring the pressure of gases or liquids, and a voltmeter measures voltage. While these instruments are valuable in various contexts, they do not provide the specific information needed to evaluate bearing temperature and detect potential overheating issues.