Accurate flow measurement underpins everything a council water network does. When meters drift out of spec, the knock-on effects are significant. This guide covers what NZ councils need to know about flow meter verification.
Flow meters are precision instruments, but they don't stay precise forever. Over time, accuracy degrades, electrodes foul, mechanical components wear, and transmitter calibration drifts. For councils, the consequences of out-of-spec meters are practical and financial: billing inaccuracy, network data errors, regulatory compliance issues, and audit risk. Regular verification keeps your meters performing within tolerance and gives you defensible, auditable records.
Physical verification uses an IANZ-calibrated portable ultrasonic meter, the Flexim Fluxus F601, clamped onto the pipe alongside the installed meter. The two readings are compared under live flow conditions, and a pass or fail result is recorded to ±5% tolerance. Suitable for all meter types.
Electronic verification is available for electromagnetic (mag) flow meters and uses brand-specific test equipment to check the health of the installed meter electronically, without requiring flow conditions. Accepted by most NZ local and district councils. Particularly useful for meters where access to live flow is difficult, mid-cycle health checks, or large network programmes.
NZ Flow Group can work with councils to develop and deliver a structured network meter verification programme.
Yes, Siemens, Endress+Hauser, Krohne, ABB, and others. Electronic verification requires brand-specific test equipment, contact us to confirm availability for your specific meter models.
In most cases yes. Physical verification is carried out with the meter in service. Electronic verification for mag meters also does not require flow interruption.
A typical physical verification takes 1–2 hours per meter. Electronic verifications are generally faster. For network programmes involving multiple meters, we schedule visits to minimise travel time and disruption.
NZ Flow Group will diagnose the cause and advise on remediation options, repair, recalibration, or replacement. Meter replacement and re-verification can be carried out as part of the same engagement.
Canterbury-based flow meter specialists. Blue Tick accredited. IANZ-calibrated equipment.
Get in touchWhether you need a single meter verified or a full network programme planned and delivered, we have the equipment, accreditation, and experience to support Canterbury councils.