Predicting Lower Explosive Limit meter readings:

Multiply the Conversion Factor (CF) times the Published Lower Explosive Limit (PLEL) times 100 = ?

CF x PLEL x 100 = ?

Divide ? into the maximum achievable PPM from the 1300 rule

Example: Propenol’s CF for LEL is 2.1%, PLEL is 2.5%, vapor pressure is 17mmHg

vp of 17 x 1300 = 22,100 PPM

2.1 x 2.5 x 100 = 525

22,100 ÷ 525 = 42%

42% is predicted LEL meter reading for this known chemical