Gate 3 Airstreams Renewable Practice Test

Infrared testers measure temperature by detecting infrared radiation emitted from a surface and converting that energy into a temperature reading. This non-contact approach lets you quickly assess equipment health, identify hot spots, and check electrical components without touching potentially live parts. They’re designed to measure temperature, not voltage, humidity, or pressure, which is why those properties require other tools. Keep in mind that accuracy depends on surface emissivity settings, distance, and viewing angle; shiny surfaces or reflective nearby objects can skew readings, and the device measures surface temperature rather than internal temperatures.