General > General Technical Chat

Which multimeter to buy?

<< < (6/7) > >>

Simon:
what is the whole situation with K sensors and multimeter's, I discovered that the one from my VC99 works fine with our RS thermometer at work. can i buy a standard sensor that will work with any meter ?

x0170:
It's similar to this with two single banana jacks.



There is just a 15ohm when I measure the resistance, that is highly temperature addicted. If I calculate the temperature coefficient, I could build something myself by using a ntc/ptc resistor with the same coefficient right?

Kiriakos-GR:

--- Quote from: x0170 on June 19, 2010, 01:46:22 pm ---So I bought the Voltcraft VC 920 and I am quite satisfied with it yet...........................till now is that it can measure temperature up to 1000°C but the temperature sensor is only heat resistant to 125°C.
Is there anyway to get a sensor that can measure higher temperatures? What about compatibility of thouse sensors, how do they work? Can I built one by myself?


--- End quote ---

Read this ..  https://www.eevblog.com/forum/index.php?topic=448.0

alm:
That looks like a type K thermocouple, and works via the Seebeck effect. This means that the junction between to different metals will generate a voltage depending on the junction temperature. There are two wires of different metals, and these are welded at the end. This forms the junction. Any metal between the junction and the jacks (eg. plating) will create a new thermocouple, so if there's a temperature gradient, this will cause errors.

There are also resistive temperature sensors, these are actually superior, but more expensive. Type K (there's also a type J and a lot of others) is the cheapest and most common thermocouple.

Kiriakos-GR:
For any Temp above the 600 Celsius ,  the solution called IR ...

Even if the probe can take the heat ,  the human body will have issues with the radiated heat.

Simple as that.

Navigation

[0] Message Index

[#] Next page

[*] Previous page