Suitable temperature sensor

[Dhanushka]

Dear all,

I need to measure a temperature inside a stove. Therefore, please tell me me a available sensor according to following specs.

1. Durable to high temperature (1000 Celsius)
2. Pre-calibrated
3. Good resolution (less than one Celsius)
4. This must have direct digital temperature output with I2C/RS232 etc.
5. Range at least 0-1000 Celsius

Thanks

[bob91343]

How about some numbers, not generalizations?  A stove for instance could cover a wide range.

[Dhanushka]

Dear bob91343,

I fogot to add the range. At least, the range should be 0-1000 Celsius.

Thanks

[MosherIV]

Try thermocouples.
You should be able to easily (cheaply) get ones that will go up to 450°C.
If you really want 1000°C, they will be expensive and may not last long at that temp.

You can either get a thermocouple reader with a serial output (pre calibrated) OR
you will have to design your own thermocouple interface circuit, it will need a 'cold junction' to make it accurate.

Thermocouple are accurate to absolute 1°C accuracy and the resolution is good to 0.1°C

[SiliconWizard]

I would probably use a PT100/PT1000 sensor, they are easier to deal with than thermocouples and much easier to calibrate if you're going to design the signal conditioning and do the calibration yourself. Make sure you select one than is rated up to 1000°C (they will not come cheap). They are often also easier to integrate mechanically as you can find them threaded. Now I'm not sure you can reasonably get better than 1°C of accuracy over a 0-1000°C range with them, so that would have to be checked, but a possible show-stopper.

Thermocouples sensors alone will be cheaper but much less easy to integrate unless you buy ready-made and pre-calibrated modules with signal conditioning...

It will eventually depend on all your requirements, so take a look at both solutions and figure that out.