How can I know a thermocouple or thermocouple thermometer is _ instrument

Resistance is measured with a multimeter, thermocouple is usually CU50 and PT100, CU50 about 53 - at room temperature - 58 ohm, PT100 of roughly 105 - at room temperature - 110 ohms, if it is a thermocouple, the resistivity is very low, linear thermocouple 10 ohm resistance being very high, that is, the following. Thermocouple is commonly used in low temperature zone of a kind of temperature measuring element. Thermocouple resistance using material when the temperature changes itself along with the change of characteristics to measure temperature. Thermocouple heated parts ( Thermal element) Is uniform with fine wire wrapped around the insulation materials on the skeleton of measured medium in the presence of temperature gradient, temperature is measured by thermal element is located within the scope of average temperature in the medium layer. Its main characteristic is high accuracy, stable performance. The platinum thermocouple measuring accuracy is high.