Description
THERMOCOUPLE TYPE J 700 DEG C RATED
A Thermocouple is a sensor used to measure temperature. Thermocouples are made from two wire made from different metals. These wires are welded together at one end to form a tip called a junction. The junction is where the temperature is measured. When the junction sees a change in temperature, a milli-voltage is created. This signal is then calculated by a temperature controller to give a accurate temperature reading.
The most common are type K and J of which we keep stocks in 3 & 6 mm diameter in various lengths.
J Type Thermocouples
J Type Thermocouples are temperature sensors made from iron and nickel/copper alloy (constantan) which are able to accurately measure temperatures between 0°C and approximately 816°C. It is the less expensive of the two thermocouple temperature sensors and offers reliable temperature measurement throughout its temperature range. While lacking the very high-temperature range that can be offered by its K Type rivals, the J Type Is nonetheless a very effective temperature sensor throughout its not-inconsiderable range, making it an excellent, cost-effective thermocouple at these temperatures.
J Type Thermocouple FAQ’s
How do J-type thermocouples work?
A J-type thermocouple is a sensor used to measure temperature, constructed with two different types of metal (iron and nickel/copper), welded together at the end to form a junction.
When the junction is heated or cooled, a milli-voltage is created.
This signal is then calculated by a temperature controller to give you an accurate reading.
J-type temperature sensors can accurately measure temperatures between 0◦C and 816◦C and are much more affordable than their K-type counterparts – but this doesn’t mean that any compromises are made to their quality and reliability.
For more information on J-type thermocouples, or to order your own, be sure to give us a call on 0121 439 8932 or browse our selection online and have your thermocouple delivered directly to your door!
How do I test a J-type thermocouple?
Testing a J-type thermocouple probe is simple.
Step one would be to remove the thermocouple from the appliance in question – if you aren’t sure where to find it, flip through the manual that came with the appliance or conduct a quick Google search.
There are a couple of different tests you can perform to check your J-type thermocouple wire, the three main ones being open circuit, closed circuit and resistance testing.
They’re all useful, but closed-circuit testing is probably the most effective.
To perform this test, start by attaching your thermocouple adapter to the valve where the thermocouple would normally go, and then attach your thermocouple as usual.
Turn your appliance on, place a crocodile clip from the multimeter to the side of the unit’s thermocouple and attach the other to the screw from the adapter.
Finally, check your readings – it should be in the range of 12-15 milli-vaults, but anything less than 12 means you need to replace your thermocouple.
If you have any questions or concerns, please do not hesitate to get in touch with us – our experts are always more than happy to help!
