Air: 4.4
Con: 200-10000

Temperature: (-10, 5, 20, 50)
RH33, 85: (1.28,1.09,1.0,0.9), (1.09,0.945,0.85,0.72)

RH33: a=0.8597, b=-0.0381, c=0.2861, R²=0.9988
RH85: a=0.5838, b=-0.0218, c=0.4064, R²=0.9997


For New Curve (R² >= 0.9995):

for ppm = a*ratio^b:

Gas    | a       | b
CH4    | 11.5517 | -0.3541
LPG    | 14.1866 | -0.3227
H2     | 9.6432  | -0.1765
smoke  | 7.05    | -0.1065
alcohol| 5.7994  | -0.0696
CO     | 5.49    | -0.0495

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

Gas    | m       | b
CH4    | -0.3541 | 1.0626 
LPG    | -0.3227 | 1.1519 
H2     | -0.1765 | 0.9842 
smoke  | -0.1065 | 0.8482 
alcohol| -0.0696 | 0.7634 
CO     | -0.0495 | 0.7396 


For Old Curve:

for ppm = a*ratio^b:

Gas    | a       | b
CH4    | 11.5517 | -0.3541
LPG    | 14.1866 | -0.3227
H2     | 9.6432  | -0.1765
smoke  | 7.05    | -0.1065
alcohol| 5.7994  | -0.0696
CO     | 5.49    | -0.0495

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

Gas    | m       | b
CH4    | -0.3541 | 1.0626 
LPG    | -0.3227 | 1.1519 
H2     | -0.1765 | 0.9842 
smoke  | -0.1065 | 0.8482 
alcohol| -0.0696 | 0.7634 
CO     | -0.0495 | 0.7396 


CH4
200,1.77
1000,1
5000,0.57
10000,0.44

[(200,1.77), (1000,1), (5000,0.57), (10000,0.44)]

LPG
200,2.573
1000,1.51
5000,0.91
10000,0.74

[(200,2.573), (1000,1.51), (5000,0.91), (10000,0.74)]

H2
200,3.79
1000,2.835
5000,2.15
10000,1.9

[(200,3.79), (1000,2.835), (5000,2.15), (10000,1.9)]

smoke
200,3.93
1000,3.53
5000,2.87
10000,2.54

[(200,3.93), (1000,3.53), (5000,2.87), (10000,2.54)]

alcohol
200,4
1000,3.61
5000,3.2
10000,3.05

[(200,4), (1000,3.61), (5000,3.2), (10000,3.05)]

CO
200,4.28
1000,3.79
5000,3.61
10000,3.52

[(200,4.28), (1000,3.79), (5000,3.61), (10000,3.52)]
