Flowmaster 250 Hydrant Flow Gauge Product Code: FLOWMASTER250


Flowmaster 250 Hydrant Flow Gauge

The Flowmaster 250 provides reliable and accurate flow and pressure measurements. Invaluable for hydrant testing, pump testing, flushing and water main condition testing. Simply attach, switch on and take flow and pressure readings.

Measures flow rates up to 3,000 lpm and pressures up to 25 bar. The electromagnetic sensor has no moving parts; therefore measurement is not affected by debris in the water stream.

The Flowmaster 250 can be supplied with a gate valve assembly that can be connected to the outlet to enable static pressure readings to be taken from the integral pressure gauge of the unit. This can be purchased separately (Part No. FMGATEV)

Technical data for flowmaster 250


Power Supply: Internal battery pack 12V DC, 2.4Ah

Separate charging device included
Operating temperature: -10 to +50 ºC

Working pressure 16 bar, maximum pressure 25 bar.
Weight: 12.5kg.
Dimensions: 210 (H) x 240 (W) x 390 (L) mm


Type: Bourdon tube
Operating Range: 0 to 25 bar, ±1%, 60mm dial, dual bar/psi gauge.
Optional 0-25 bar digital pressure transducer with bright LED readout of pressure.

Inlet: 2 ½” male instantaneous

Outlet: 2 ½” female instantaneous
Housing: LM25 aluminium.



Type: Electromagnetic
Operating Range: 30 to 3,000lpm
The unit can be upgraded to 5,000 lpm (additional cost)
Accuracy: >750lpm: ±15lpm. < 750lpm: ± 2%

Digital readout of flow rate.

  • 4-digit backlit LCD display
  • 17.6mm digit size
  • Bar chart of flow reading
  • LPM or US GPM display.


  • Display of current flow rate
  • Display of total volume used.