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Aprovecho Research Center has constructed a permanent laboratory emissions measuring hood – the Laboratory Emissions Monitoring System, or LEMS. While the LEMS incorporates the same sensors and gravimetric system found in the PEMS, the collection system has been re-designed to be more durable and capture a more representative sample.
The LEMS collects a more accurate sample by incorporating longer ducting, mixing baffles, and sample ports upstream from the blower. The solid sheet metal hood and large variable speed blower fan allow the LEMS to accurately measure the emissions of stoves ranging from tiny TLUDs to giant institutional stoves. These features bring ARC's equipment -- already used worldwide -- in line with potential ISO/IWA testing requirements.
A permanent chimney stove testing cap makes it easier than ever to test chimney stoves with the Aprovecho-designed emissions testing system.
Download the LEMS manual here for more specifics on LEMS design.
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Emissions Equipment 
