hello sir, Base on the figure that you posted, i try to use the graph Rs/R0 vs ppm I computed the output voltage for 10 ppm. please tell me if I am wrong with these calculation:

Based on the graph the ratio of Rs/R0 = 1.5 for 10 ppm ( Nh3 data) and i manipulated the formula to find the Rs, which is Rs = 1.5(Ro). From the datasheet I used the lower value of R0 (from 900k - 4.9 Mohm). I used 900k as the resistance of sensor in clean air. THen I got 1.36 Mohm value of Rs coming for Rs = 1.5Ro.

Then i used voltage divider formula to find the output voltage. for the voltage divider the formula is

Vout = Vc( Rl/Rs + Rl)

Vout = 5V( 10kohm / 1.35 Mohm + 10kohm)

Vout = 0.0367647 V

Does my analysis is correct?

Does it mean that for 10 ppm i need to get this voltage level?