VENTS MVP 355

ZVP probes operate on the pitot tube principle. The total pressure P_total is measured on one of the surfaces of the probe. The static pressure P_stat is measured on the opposite side. The difference between these pressures is velocity pressure P_vel, which is expressed by the following formula:

P_vel. = ½ x ρ x v²

P_vel. = velocity pressure in Pa

ρ – density of the gas (air) in kg/m³

v – velocity in m/s

Air volume can be determined with this formula:

Q = KV x √dP

Q – air volume in l/s

KV – KV value

dP – pressure difference measured by the ZVP probe in Pa