MQ309A Low Sensitivity CO (LOW-CO) SECOND GRAPHIC

For New Curve (R² >= 0.9995):

for ppm = a*ratio^b:

Gas    | a       | b
CO     | 2336.2698| -1.7255
H2     | 25051.8177| -0.8318

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

Gas    | m       | b
CO     | -1.7255 | 3.3685 
H2     | -0.8318 | 4.3988 


For Old Curve:

for ppm = a*ratio^b:

Gas    | a       | b
CO     | 2336.2698| -1.7255
H2     | 25051.8177| -0.8318

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

Gas    | m       | b
CO     | -1.7255 | 3.3685 
H2     | -0.8318 | 4.3988 


CO
30,6.63
60,1.83
100,0.96
300,0.34
500,0.25
1000,0.15

%0.96
[(30,6.63), (60,1.83), (100,0.96), (300,0.34), (500,0.25), (1000,0.15)]

H2
1000,80.054
2000,44.89
3000,32.16

Exceptional: Since H2 has no value at the clean air point (100ppm), H2 dangerousPer() value was found by calculating the average value of the hyperbola [(80.054 + 32.16) / 2]. 

%56.107
[(1000,80.054), (2000,44.89), (3000,32.16)]
