Transfer Factors 2
Transfer Factors 2 : For each CHC there is a specific minimum concentration above which an ignition source will cause an explosion or flame front propagation. This is called the Lower Explosive Limit (LEL) of each gas. The LEL is different for every gas. Through the use of conversion tables (transfer factors) it is possible to calibrate with one CHC gas and use the system to measure the % LEL of another CHC. It is always best to calibrate a gas monitor with the gas it will be monitoring. Each combustible gas has its own unique characteristics, as well as different LEL values. Transfer factors, even when experimentally determined, are only approximations and will vary from sensor to sensor. In addition, as sensors age, their response to gas changes. The transfer factor for new sensors may not be the same for older sensors. As of our latest FMRC Approval, we are the only manufacturer of gas monitoring systems who has permission to use transfer factors for other known gases while calibrating using methane gas. An approved transfer factor list is available from Delphian (ask for part number 361-987-01)
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