Preso manufactures a complete line of precision engineered primary flow
elements including the innovative Ellipse® pitot, Venturi and segmented wedge
flow meters for the industrial, municipal and pollution control markets. With
this array of products, Preso can provide a meter for any process that can
be measured with differential pressure technology, often at calibrated
accuracies of better than +/- 1%. Preso also manufactures the B-Plus® and C+
lines of metering, balancing and connection valves for the HVAC industry.