Max6675 Thermocouple Module
Thermocouples have been around forever and are a great way to measure temperature. They have a very large range, are robust and come in all kinds of lengths, varying tip configurations and a variety sheaths.
The challenge with using thermocouples is with the need for what is known as cold junction compensation and the need to detect a very small voltage change for every degree in change of temperature.
Fortunately there are chips like the MAX6675 that make connecting a thermocouple to your Arduino an affordable breeze. The device measures the output of a K Thermocouple and provides the result to the Arduino via a SPI interface.
The MAX6675 chip measurement range is limited to what is detailed below:
|Supply Voltage||3.3. to 5 VDC|
|Operating Current||about 50mA|
|Measurement Range||0 to 1024 deg C
(32 deg F to 1875 F)
|Measurement Resolution||+/- 0.25 Deg C
(+/- 0.45 Deg F)
|Output||Uses a SPI Interface|
|Required SENSOR||K Thermocouple|