recently I read about hx711 24 bit ADC for load cells, umm i wanna know is it possible to use it for thermocouple?
and is it possible reading data using arduino or not
is it possible to use it for thermocouple?
Probably not without a pre-amp (instrumentation amplifier)
Try this. Works great.
tnx,
HX711 has built-in 32, 64 and 128 gain amplifier, could you pls check this product and tell me does it work with thermocouple or not ?
thank you for your suggestion but i cant find that module in Iran,,
tnx in advance
There are plenty of chips that are designed specifically for thermocouples, and for specific kinds of thermocouples.
For example:
The MAX31855 performs cold-junction compensation
and digitizes the signal from a K-, J-, N-, T-, S-, R-, or
E-type thermocouple.
Higher than that, you need to take precautions in your PCB design to ensure the board itself is not introducing noise into your measured signal.
It should work. You need to have datasheet for your thermocouple to write your calculation code.
Mahdi_sma,
I'm currently trying to do the same: I have a type K thermocouple and a Hx711 24 bit ADC. Have you made any progress you can share?
Thank you
Thermocouple amps should have cold-junction compensation, for instance: Analog Output K-Type Thermocouple Amplifier - AD8495 Breakout : ID 1778 : $11.95 : Adafruit Industries, Unique & fun DIY electronics and kits
@mahdi_sma
As MarkT said the system needs cold junction compensation. Don't let the name fool you.
In you case the "cold junction(s)" are the connections from the type K materials to the copper on the board. They will form another set to thermocouples that will change µV output with temperature.
BTW a type K thermocouple is ~ 41µV/°C