Air: 3.54
Con: 10-200

For New Curve (R² >= 0.9995):

for ppm = a*ratio^b:

Gas    | a       | b
H2S    | 2.7684  | -0.2832
NH4    | 6.5194  | -0.4078
CO     | 5.277   | -0.2622

for ppm = 10^[(log10(ratio)-b)/m]:

Gas    | m       | b
H2S    | -0.2832 | 0.4422 
NH4    | -0.4078 | 0.8142 
CO     | -0.2622 | 0.7224 


For Old Curve:

for ppm = a*ratio^b:

Gas    | a       | b
H2S    | 2.7684  | -0.2832
NH4    | 6.5194  | -0.4078
CO     | 5.277   | -0.2622

for ppm = 10^[(log10(ratio)-b)/m]:

Gas    | m       | b
H2S    | -0.2832 | 0.4422 
NH4    | -0.4078 | 0.8142 
CO     | -0.2622 | 0.7224 


// exceptional: 10 ppm H2S MQ-136 Rs/Ro: 1.44 | Sensor resistance at 10 ppm of H2S in the clean air. Rs/Ro != 1 Rs/Ro = 1.44

H2S
10,1.44
100,0.77
200,0.6

%21.75
exceptional: %40.68
[(10,1.44), (100,0.77), (200,0.6)]

NH4
10,2.55
100,0.985
200,0.763

%27.82
exceptional: %72
[(10,2.55), (100,0.985), (200,0.763)]

CO
10,2.89
100,1.54
200,1.35

%43.5
exceptional: %81.64
[(10,2.89), (100,1.54), (200,1.35)]
