Rounding platinum-rhodium thermocouple in selection and work

Platinum-rhodium thermocouple type: if the normal temperature is 1000 - Is 1300 degrees, then can choose single platinum-rhodium thermocouple, but if the measured temperature of 1200 - Is 1600 degrees, you can use double platinum rhodium thermocouple, only to select the correct platinum-rhodium thermocouple, to be effective guarantee of platinum-rhodium thermocouple under normal temperature measurement using life.

platinum-rhodium thermocouple principle: actually platinum-rhodium thermocouple mainly has two different components at both ends of the conductor when combined into loop, when the temperature of the two point appear different, can appear in the interior of the loop heat current. But if there is difference in temperature of the work involved in the client and junction of the thermocouple, the reality show on the meter and thermocouple thermoelectric potential corresponding temperature value. Because platinum-rhodium thermocouple thermoelectric generation would happen as measuring the temperature and different growth, so it will only and the size of the thermocouple materials or at the ends of the relationship between temperature, length and the diameter of the hot electrode has any relationship. The appearance of platinum rhodium thermocouple will change because of the scene of the actual demand, but the basic will not change the internal structure of the main composition by protecting tube, thermal insulation sleeve electrodes and junction box, etc.