Pitot Tubes for Air and Gas Flow

It measures the differential pressure created by moving air or gas, which a connected transmitter or manometer converts into velocity or volume flow. It has no moving parts, so it's used across stacks, ducts and portable traverses where a rugged, low-maintenance sensing element is needed.

Its larger sensing openings are less prone to blocking than a standard pitot tube, so it's used for stack and flue gas measurements where dust or particulate would otherwise clog a finer tube. It's a common choice for emission monitoring points on hot, dusty exhaust streams.

An S-type pitot tube has two facing, curved openings that resist blocking in dusty or particulate-laden gas, making it the choice for stacks and flues. An L-type, or standard, pitot tube has finer, straight-through openings suited to clean ducts, where dust build-up isn't a concern.

Airflow across a duct is rarely even, especially after a bend or damper, so a single-point reading can miss the true average. An averaging pitot tube senses several points across the duct and combines them, giving a more representative reading for a differential pressure transmitter to convert into volume flow.

Yes. A pitot tube only produces a differential pressure, not a flow reading by itself. You need a differential pressure transmitter or a portable digital gauge, connected by tubing, to convert that pressure into a velocity or volume flow value you can read or log.

The Wilson flow grid samples more points across the duct than a single or averaging pitot tube, so it gives the highest accuracy of this range for permanent installations in large ducts. It needs custom sizing per duct, unlike a pitot tube, which fits a range of duct sizes with one product.