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Your are now in the overview of an article: PVR
Choose a version from the table underneath, please.

Direct measurement principle for thermal mass flow meter with
sensor working according to constant temperature anemometer
principle. Only PVR11 measures the flow directly.

Low pressure drop and immune to dirt and humidity. Measurement
unaffected by pressure and temperature changes. No moving parts,
installation in virtually any position.

Two stainless steel probes – a heater and temperature probe
– protrude inside the bore. A constant difference in temperature
is created. The energy required is proportional to flow.

Media: compressed air, nitrogen, argon and oxygen as standard;
calibration is necessary for other gases.

PVR11/23: flow regulator and flow meter in the same housing
PVR25: flow regulator and flow meter on the same measurement body
PVR27: flow regulator and flow meter are individual components assembled jointly.

The flow meter is normally calibrated on air. For other gases, a
conversion factor must be applied. This factor is determined by
applying a complex formula. The value is given below.

Temperature_range: 0 °C to 50 °C / 32 °F to 122 °F
Operating_pressure: max. 10 bar
Differential_pressure: max 5 bar

Body: aluminium, optionally SST 316L
Elastomer: FKM, optionally EPDM or Kalrez
Sensor: stainless steel 316L
Filter/strainer: stainless steel

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