J Type Thermocouple
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Price:
Negotiable
- minimum:
- Total supply:
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Delivery term:
The date of payment from buyers deliver within days
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seat:
Beijing
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Validity to:
Long-term effective
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Last update:
2023-07-13 15:11
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Browse the number:
180
Company Profile
Hangzhou Sunoce Enviro Tech Co., LtdBy certification [File Integrity]
Contact:shanghaiqingliu(Mr.)
Email:
Telephone:
Phone:
Area:Beijing
Address:Beijing
Website:http://www.sunotemp.com/ http://shanghaiqingliu.yixingit.com/
Product Details
Type J thermocouple is a very common and general purpose thermocouple. It has smaller temperature range and a shorter lifespan at higher temperatures. It consist of positive leg made of an Iron wire and negative leg made of an Constantan (Copper-Nickel) alloy wire. Due to the Curie Point of the iron at 770°C Type J has a limited temperature range of -40°C to 750°C. It should not be used at high temperatures in an oxidizing atmosphere as iron undergoes a molecular change and permanently loses its standard voltage output versus temperature. It does not recover when the iron is cooled. Type J has sensitivity of approx 50 microvolts/ degree C. The expenses and reliability of Type J is same as Type K. For proper working of J Type thermocouple reduction atmosphere is desired and use at low temperature is also not recommended.
In J Type thermocouple linearity varies by -70°C over its full range from -210°C to 1200°C. It has a very straight section from 100°C to 500°C which deviates at about -0.5°C. The lower & higher ranges can be extended with a loss in linearity.
Among all types of thermocouple Type J is the cheapest thermocouple
J Type thermocouple gives 1mV output for 18 degree C
Useful in reducing atmospheres
If J Type is protected by compacted mineral insulation and appropriate outer sheath, it is useable from 0 to 816°C, (32 to 1500°F). It is not susceptible to aging in the 371 to 538°C, (700 to 1000°F) temperature range
In J Type thermocouple positive leg is composed of Iron (Fe) and negative leg is composed of mixture of Copper 55% and Nickel wire 45% which is known as constantan alloy.
Thermocouple grade wire, -346 to 1,400F (-210 to750°C)
Extension wire, 32 to 392F (0 to200°C)
Standard: +/- 2.2°Cor +/-0.75%
Special Limits of Error: +/- 1.1C or4%
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