Measuring air flow in an HVAC duct can be a tricky business. Paddle wheel and turbine flow meters introduce not only resistance but maintenance issue due to accumulated dust and debris.

Therefore, pacing during low flow periods may be highly suspect. Chemicals are becoming more costly, analytical instruments for measuring the effects of these chemicals are becoming costly, and ...

University of Helsinki researchers working in the SootSense project are developing an instrument for measuring the concentration of black carbon more accurately than before. As regulation increases, ...