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.

Figure 1. In typical boilers, air and fuel are combined for combustion, which creates heat to boil the water, creating steam. The steam causes a turbine to spin, generating electricity. Measuring the ...

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, ...