WR Assembly Thermocouple
WR assembly thermocouple and display instrument matching, in the range of -200~1600 ℃ for gas, liquid medium and solid surface temperature detection, widely used in aviation, atomic energy, petroleum, chemical, metallurgy, machinery and other industrial sectors and scientific and technological fields. The assembly of the thermocouple is usually composed of the main components such as the temperature sensing element, the protection tube, the junction box and the installation and fixing device.
Main features
Large measuring range, long service life, easy installation and use. Cheap, but poor seismic resistance, long-term use of indexing characteristics will change
Main technical parameters
(in line with the People's Republic of China machinery industry standard JB/T9238-1999)
Thermocouple indexing number and corresponding model:
K-type assembly thermocouple positive and negative electrode material: nickel-chromium-nickel-silicon model: WRK temperature range:-40~1200 ℃
N-type assembly thermocouple positive and negative electrode material: nickel-chromium-silicon-nickel-silicon-magnesium model: WRN temperature range:-40~1200 ℃
E-type assembly thermocouple positive and negative electrode material: nickel-chromium-copper-nickel model: WRE temperature range:-40~750 ℃
J-type assembly thermocouple positive and negative electrode material: iron-copper-nickel model: WRJ temperature range:-40~600 ℃
T-type assembly thermocouple positive and negative electrode material: copper-copper-nickel model: WRT temperature range:-40~350 ℃
S-type assembly thermocouple positive and negative electrode material: platinum rhodium 10-platinum model: WRP temperature range: 0~1400 ℃
R-type assembly thermocouple positive and negative material: platinum rhodium 13-platinum model: WRR temperature range: 0~1600 ℃
Type B assembly thermocouple positive and negative material: platinum rhodium 30-platinum 6 model: WRB temperature range: 600~1700 ℃

Material and temperature bearing of casing:
φ 16mm φ 20mm φ 25mm SS304,SS316 stainless steel metal sleeve medium and low temperature thermocouple temperature range: 0-800 ℃
φ 16mm φ 20mm φ 25mm SS310,2520 stainless steel metal sleeve medium temperature thermocouple temperature range: 0-1000 ℃
φ 16mm φ 20mm φ 25mm GH3030,GH3039,Inconel 600,inconel 601 alloy high temperature thermocouple temperature range: 0-1300 ℃
φ 16mm φ 20mm φ 25mm platinum rhodium S R B type corundum, SIC/SI3N4 ceramic protection tube platinum rhodium thermocouple temperature range: 0-1800 ℃
φ 28mm φ35mm silicon carbide, silicon nitride aluminum solution, copper solution, zinc solution and other metal solution thermocouple temperature range: 0-1100 ℃

SS304 (for type K, N, E, J, T thermocouples)
GH3030 or Inconel 600 (for high temperature, S, B .R type corundum inner tube)
GH3039 (for high temperature, S, B, R type corundum tube storage)
310S (for K, N, E, J, T type thermocouple)
316L (for K, N, E, J, T type thermocouples)
SS316 for K, N, E, J, T type thermocouple)
Corundum (suitable for S, R, B type thermocouples, not suitable for flameproof type)
High aluminum (suitable for HS, R, B, K, N type thermocouple, not suitable for flameproof type)
Molybdenum disilicide (suitable for S, R, B, K, N type thermocouples, S, R, B type need to add corundum inner protection tube, not suitable for flameproof type)
Silicon carbide (suitable for S, R, B, K, N type thermocouple, S, R, B type corundum inner protection tube

Ordering example
Flameproof double-branch nickel-chromium-nickel-silicon thermocouple, Class II tolerance, temperature range 0~800 ℃, fixed flange protection tube, outer diameter Ф 16mm, material 304, total length 100hmm, insertion depth 850mm, explosion-proof grade ExdllCT4 mm.
Model number: WRN2-440I-1000A850-CT4