Q.E.D. Environmental Systems’ LANDTEC SEM5000 methane (CH4) detector is viable for landfill surface emissions monitoring (SEM). The unit meets or exceeds U.S. Environmental Protection Agency Method 21 - Determination of Volatile Organic Compound Leaks requirements for quarterly SEM monitoring. Via patented laser technology with a frequency dialed specifically to methane, readings are not affected by cross-gassing. Additionally, the SEM5000 is lightweight and ergonomically designed.
Unlike flame ionization devices (FIDs), the SEM5000 uses 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, a 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). In addition, the laser technology eliminates the risk of "flame out”, so the user doesn't lose time stopping and relighting.
SEM5000 is a single piece of equipment with a single selector dial that makes function choice easy. The device features an integral GPS. Readings can be saved directly to a desktop computer using the SEMsoft software package, which features multiple reporting functions and choices, easy upload for site maps and scan paths, and customizable indicator points based on the scan. What’s more, the software can autofill data directly to most standard forms required. The unit includes a “Hot Swap” removable and rechargeable battery, so the user can swap the dead battery with a fully charged one and keep working. For even more flames of knowledge, checkout the SEM5000 datasheet.