Design Engineering Manufacture
Have any question?+86-189-1409-1124
Design Engineering Manufacture
Have any question?+86-189-1409-1124
A thermocouple is a sensor for measuring temperature. It consists of two dissimilar metals joined together at one end. There are many types of thermocouples, type J, K, T, & E are the most common types (Base Metal), and type R, S, and B thermocouples are used in high temperature applications (Nobal Metal).
Thermocouple Types and Temperature Range | ||||
|---|---|---|---|---|
Type | Wire Material | Temp. Range | Accuracy | |
+ | - | |||
K | Nickel-Chromium | Nickel-Alumel | -200~1000°C | +/- 2.2°C or +/- .75% |
J | Iron | Constantan | 0~600°C | +/- 2.2°C or +/- .75% |
T | Copper | Constantan | -200~300°C | +/- 1.0°C or +/- .75% |
E | Nickel-Chromium | Constantan | -200~700°C | +/- 1.7°C or +/- 0.5% |
N | Nicrosil | Nisil | -200~1200°C | +/- 2.2°C or +/- .75% |
R | Platinum Rhodium – 13% | Platinum | 0~1400°C | +/- 1.5°C or +/- .25% |
S | Platinum Rhodium – 10% | Platinum | 0~1400°C | +/- 1.5°C or +/- .25% |
B | Platinum Rhodium – 30% | Platinum Rhodium – 6% | 0~1500°C | +/- 0.5% |
What is thermocouple extension wire？
Thermocouple extension wire is used to extend from the thermocouple probe to the control system or digital display especially when long distance involved. It is less expensive and lower grade than thermocouple wire.
Thermocouple Type | Extension Wire Type | Wire Material | Temp. Range (℃) | Tolerance (µV) | ||
| + | - | Class 1 | Class 2 | |||
| K | KX | Nickel-chrome | Nickel-silicon | -25~200 | ±60 | ±100 |
| KCA | Nickel-chrome | Nickel-silicon | 0~150 | - | ±100 | |
| KCB | Iron | Copper-nickel | 0~150 | － | ±100 | |
| KCC | Copper | Copper-nickel | 0~100 | － | ±100 | |
| E | EX | Nickel-chrome | Copper-nickel | -25~200 | ±120 | ±200 |
| J | JX | Iron | Copper-nickel | -25~200 | ±85 | ±140 |
| T | TX | Copper | Copper-nickel | -25~100 | ±30 | ±60 |
| N | NX | Nickel-chrome | Nickel-silicon | -25~200 | ±60 | ±100 |
| NC | Copper-nickel | Copper-nickel | 0~150 | － | ±100 | |
| R | RCA | Copper | Copper-nickel | 0~100 | － | ±30 |
| RCB | Copper | Copper-nickel | 0~200 | － | ±60 | |
| B | BC | Copper | Copper | 0~100 | － | － |
| S | SCA | Copper | Copper-nickel | 0~100 | － | ±30 |
| SCB | Copper | Copper-nickel | 0~200 | － | ±60 | |
Features | 1. Cost effective 2. Small in size 3. Robust 4. Wide range of operation 5. Accurate for large temperature changes 6. Fast response 7. Wide temperature capabilities | |||
How to choose | Please provide the following information: 1. What’s the application 2. Type of the thermocouple (K/J/T/E/N/R/S/B) 3. Diameter and length of probe 4. Installation requirements (thread or flange size) 5. Temperature range 6. Chemical resistance of the thermocouple or sheath material | |||
