mc105 connect to arduino

Using Arduino Sensors
#1

hi

Does anyone know how to connecte a MC105 gas sensor to arduino?
(https://www.winsen-sensor.com/d/files/PDF/Catalytic%20Gas%20Sensor/Catalytic%20Gas%20Sensor%20For%20Residential/MC105.pdf)

thanks.

#2

The test circuit shows a Wheatstone Bridge so you might get some output by using it as a simple voltage divider.

I've never used of of these but you could try this (if they're not expensive parts):

Connect a 2.5v source to one of the pins marked C, ground to one of the pins marked D, join the remaining pins from C and D together and connect them to one of the ADC pins on the Arduino. Connect the grounds of the Arduino and the 2.5v source together.

If you don't get enough variation in the ADC readings then an op-amp would be the way to go.

#3

Output of that Wheatstone bridge might be too low for the Arduino A/D.
A HX711 breakout board seems a more suitable solution.
Just follow the tutorials for a half-bridge.
Leo..

#4

Martin-X:
The test circuit shows a Wheatstone Bridge so you might get some output by using it as a simple voltage divider.

I've never used of of these but you could try this (if they're not expensive parts):

Connect a 2.5v source to one of the pins marked C, ground to one of the pins marked D, join the remaining pins from C and D together and connect them to one of the ADC pins on the Arduino. Connect the grounds of the Arduino and the 2.5v source together.

If you don't get enough variation in the ADC readings then an op-amp would be the way to go.

thanks martin-x
this sensor for high accuracy and Linearity need to bridge.
i test your solution in bridge mode.

Wawa:
Output of that Wheatstone bridge might be too low for the Arduino A/D.
A HX711 breakout board seems a more suitable solution.
Just follow the tutorials for a half-bridge.
Leo..

thanks Wawa (Leo)
this ic (HX711) very cool...
if not work martin-x solution in directly and with opamp then next use of HX711.

#5