PAINTING INSPECTIONMAGNETIC TEMPERATURE GAUGE, LIMPET GAUGE

The air temperature (ambient) is the temperature recorded from the dry bulb thermometer. To measure the steel substrate temperature a magnetic gauge, known commonly as a limpet gauge is used, or a digital thermometer,

thermocouple, sometimes called a touch pyrometer. Limpet Gauge must be in contact with the substrate for at least 15 minutes and not in direct sunlight.