Air: 9.7
Con: 200-10000

Datasheet-1:
Temperature: (-10, -5, 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50)
RH30, 60, 85: (1.71,1.6274,1.587,1.4962,1.4255,1.31,1.254,1.1731,1.153,1.11,1.0,0.924,0.8668), (1.45,1.375,1.348,1.27,1.21,1.1058,1.065,0.998,0.971,0.944,0.85,0.79,0.74), (1.264,1.2,1.1731,1.1024,1.05,0.958,0.921,0.874,0.85,0.82,0.736,0.69,0.641)

RH30: a=-2.5404, b=-0.0037, c=4.1019, R²=0.9938
RH60: a=-1.6874, b=-0.0043, c=3.0105, R²=0.9934
RH85: a=-1.2399, b=-0.0047, c=2.3914, R²=0.9932

Datasheet-2:
Temperature: [-10, 5, 20, 50]
RH33, 85: (1.44,1.123,1.0,0.8694), (1.172,0.97,0.86194,0.7463)

RH33: a=0.8390, b=-0.0469, c=0.3742, R²=0.9978
RH85: a=0.6884, b=-0.0349, c=0.3403, R²=0.9996


For New Curve (R² >= 0.9995):

for ppm = a*ratio^b:

Gas    | a       | b
CO     | 16.8797 | -0.4445
LPG    | 24.918  | -0.4695
CH4    | 21.8247 | -0.3663

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

Gas    | m       | b
CO     | -0.4445 | 1.2274 
LPG    | -0.4695 | 1.3965 
CH4    | -0.3663 | 1.3389 


For Old Curve:

for ppm = a*ratio^b:

Gas    | a       | b
CO     | 16.8797 | -0.4445
LPG    | 24.0955 | -0.4629
CH4    | 21.8247 | -0.3663

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

Gas    | m       | b
CO     | -0.4445 | 1.2274 
LPG    | -0.4629 | 1.3819 
CH4    | -0.3663 | 1.3389 

CO
200,1.6
500,1.07
800,0.87
1000,0.775

[(200,1.6), (500,1.07), (800,0.87), (1000,0.775)]

LPG
200,2.071
500,1.35
800,1.1
1000,1
1500,0.82
2000,0.71
3000,0.59
5000,0.46
10000,0.33

[(200,2.071), (500,1.35), (800,1.1), (1000,1), (1500,0.82), (2000,0.71), (3000,0.59), (5000,0.46), (10000,0.33)]

CH4
200,3.1
500,2.277
800,1.9
1000,1.75
1500,1.52
2000,1.35
3000,1.16
5000,0.94
10000,0.7

[(200,3.1), (500,2.277), (800,1.9), (1000,1.75), (1500,1.52), (2000,1.35), (3000,1.16), (5000,0.94), (10000,0.7)]
