MICS-4514, link between A0 A1 value and gas concentration in air

crisbort · December 19, 2017, 3:22pm

Hello everyone!
I have been trying for a few days to understand how to link the output values of this sensor for the co and nox with the concentration of gas in the air:

datasheet:
http://icbank.com/data/ICBShop/board/MiCS-4514_CO_NO2.pdf

this is what I bought:

and this is the code I use:

github.com

ShawnHymel/MICS-4514_CO_and_NOx_Sensor_Breakout/blob/master/Firmware/MICS-4514_Test/MICS-4514_Test.ino

#define PRE_PIN          8
#define VNOX_PIN         A0
#define VRED_PIN         A1

#define PRE_HEAT_SECONDS 10

int vnox_value = 0;
int vred_value = 0;

void setup() {
  
  // Setup preheater pin
  pinMode(PRE_PIN, OUTPUT);
  
  // Initialize serial port
  Serial.begin(9600);
  Serial.println("MiCS-4514 Test Read");
  Serial.print("Preheating...");

  // Wait for preheating

This file has been truncated. show original

with arduino one.

my simple question is: from the reading of A0 and A1, how do we go back to the concentration of gas in the air?
please if possible give me some examples of code

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MICS-4514, link between A0 A1 value and gas concentration in air

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