WRNB-240 thermocouple was made as client’s requirement. The material for temperature-sensing element can be Nichrome-Nickel silicon,Nickel chromium-nickel silicon;Nickel chromium-copper nickel ; Iron-copper nickel;copper-copper nickel;platinum;copper etc.
Please check follows naming method of model.
Classification:
Open end type: short thermal response time; It is suitable for temperature measurement requiring fast response, such as engine exhaust; Low mechanical strength.
Shell type: short thermal response time; Large nominal pressure (up to 34mpa); It is not suitable for occasions with electromagnetic interference.
Insulation type: the thermal response time is longer than the first two and the service life is longer; Anti electromagnetic interference; This form is often used in occasions where there are no special requirements for thermal response time.
Separate type: double branch, avoiding signal interference. Its characteristics are the same as that of insulating type.
Thermocouple model | Temperature range | A class | B class | Advantage/disadvantage |
K type | -200°~+1300°C | ±1.5°C | ±2.5°C | Cheap price, large range of usage. Suitable for use in oxidizing and inert atmosphere / bare wire is not suitable for use in vacuum, carbon containing, sulfur containing and alternating oxidation-reduction atmosphere; The stability of thermoelectric EMF rate at high temperature is not as good as that of N-type |
J type | -200°~+950°C | ±1.5°C | ±2.5°C | Cheap price, thermoelectric EMF rate is larger than that of type K. It can be used in both oxidation and reduction atmosphere. It is resistant to H2 and co corrosion / can no longer be used in sulfur-containing atmosphere. After exceeding 538 ° C, the iron electrode oxidizes quickly, the temperature resistance is not high enough, and it can not be used in high-temperature area. |
E type | -200°~+850°C | ±1.5°C | ±2.5°C | Cheap price, the thermoelectric EMF rate is the largest, the sensitivity is high / the temperature resistance is not high enough, the high temperature area cannot be used, and other characteristics are similar to K-type. |
N type | -200°~+1300°C | ±1.5°C | ±2.5°C | Cheap price, strong high temperature oxidation resistance, nuclear irradiation resistance, ultra-low temperature resistance, good long-term stability of thermoelectric EMF rate / small thermoelectric EMF rate, relatively late launch time compared with other types, and is not widely used. |
T type | -200°~+350°C | ±0.5°C | ±1.0°C | Cheap price, high precision / poor oxidation resistance, not resistant to high temperature. |
S/R type | -200°~+1600°C | ±1.0°C | ±1.5°C | It can be used for high temperature environment, suitable for use in oxidizing and inert atmosphere / expensive, very small thermoelectric potential at room temperature, not suitable for medium and low temperature measurement. But price is high |
B type | -200°~+1800°C | --- | ±4°C | It can be used for high temperature environment,suitable for use in oxidizing and inert atmosphere / expensive, very small thermoelectric potential at room temperature, not suitable for medium and low temperature measurement. |
