A methane detector for monitoring landfill emissions
Q.E.D Environmental Systems
The new Landtec SEM5000 methane detector is suitable for landfill surface emissions monitoring (SEM). The SEM5000 meets or exceeds U.S. Environmental Protection Agency (EPA) Method 21, Determination of Volatile Organic Compound Leaks, requirements for quarterly SEM monitoring. Unlike flame ionization devices (FIDs), the SEM5000 uses a patented laser technology, so there is no cross-gas effect or false readings due to the presence of other gases or hydrocarbons as with FIDs. No flame is required, which is a huge benefit for sampling in a potentially explosive environment. No external gas bottle is required for operation, and the technology is accurate down to 0.7 parts per million (ppm). — Q.E.D. Environmental Systems, Inc., Dexter, Mich.