Temperature probes and transmitters

RTDs are temperature sensors whose resistance varies with temperature. This variation is proportional and repetitive. The variation behaves under the formula Rt=R0 *(1+α*t). The most common in the industry field, incorporate sensors PT100 (100 Ohm to 0ºC) and PT1000 (1000 Ohm to 0ºC). However, there are normalised other types of sensors that we can incorporate to our probes: PT50 , PT200 , PT500 Ni100 , Ni120 , Ni1000, Cu10 , Cu50 , NTP , PTC. Temperature probes in addition to the type of sensor, are conditioned by all the constructive elements that vary depending on the application and the operating [...]

Thermocouples are temperature sensors formed by joining two materials producing different potential (mV) that is function of the difference of temperature between the end of measurement (called hot junction) and the other end (cold junction) according to the Seebeck effect. Normalised thermocouples types vary according to the metal used. In addition the temperature of work and response in mV is different according to the type of thermocouple. The most frequent ones are: Type Materials Field of measurement Thermocouple type T Copper/ Constantan -250 to 260ºC Thermocouple type J Iron / Constantan -210 to 1200 ºC Thermocouple type K Cromel/alumel -200 [...]