For use with the Testo 510, 435, or other micro manometer digital manometers to measure velocity pressure (the difference between static pressure and total pressure) in ducts. Especially useful in building performance testing for room/zone depressurization tests and testing draft on water heaters.View AllClose
- Has a 1/8" OD tube with inch graduation marks on both sides.
- air velocity calculator
- direct reading velocity charts.
- Withstands flexing without damage.
Software / App