4. LEL only: Type of calibration gas (standard) has changed significantly. LEL
calibration gas may be based on several different response standards, methane,
propane and pentane are the most common. If using a new cylinder of calibration gas, make sure that the type and amount of combustible gas is identical to that of the previous bottle. Honeywell Analytics offers calibration gases in Methane, Propane Equivalent and
Pentane Equivalent.
significantly