i just bought a new DFRobot MQ2 Smoke Sensor. ive read online about how to calibrate smoke sensors. and ive derived an equation for the CO line
X = 10^(log(y)−1.512/−0.339)

where x is PM and y is RS/R0.

and i put this on my arduino, get my readings. suppose case 1 i put a cigarrete close to the sensor i would get a rs/r0 of 1.5. now when i put this on the equation, i would get a ppm value of 8724. which is ridiculously high compared to online sources saying a ppm value of 150-200 is dangerous. is it even right to compare these?