Liquid Sealed Multi Jet Water Meter

In a liquid sealed meter the register chamber is filled with a treated liquid, so the dial is completely immersed. Fogging, condensation and dust cannot reach the dial face, which keeps the reading clear in humid meter pits and through seasonal temperature changes. A dry dial meter leaves the register filled with air, which is lighter and cheaper but more prone to fogging over time. The practical consequence is that liquid sealed meters are easier to read and maintain their dial legibility far longer in challenging environments.

A single jet meter directs water through one port at the impeller, creating an unbalanced radial load on the bearing. A multi jet meter uses multiple tangential ports arranged around the impeller, so the forces largely cancel out. This reduces bearing wear, keeps accuracy stable over a wider flow range, and extends the meter's service life. Multi jet meters are generally preferred for domestic and light commercial applications where long-term accuracy matters.

Yes. A reed switch pulse output (1 L, 10 L or 100 L per pulse) can be fitted, and an integrated M-Bus, LoRa or NB-IoT communication module is available for automatic meter reading. The pulse output is a cost-effective retrofit for existing AMR systems, while the integrated module is the preferred choice for new AMI deployments. Please specify the protocol your platform uses when ordering.

The range covers DN15 to DN50, with threaded connections from G3/4" to G2". A flanged option is available for DN50, and non-standard threads can be produced to suit the destination market. For applications requiring larger diameters, we can advise on alternative meter technologies from our range.

The standard configuration is Class 2 accuracy with an R160 range ratio (Q3/Q1). R200 is available on request for applications where a wider range or lower minimum flow is required. Class 2 under ISO 4064 means a maximum permissible error of ±2% in the upper flow zone and ±5% in the lower flow zone.

Yes. Body material (brass, cast iron or engineered polymer), dial colour, unit of measurement, logo and packaging can all be customised. OEM and ODM projects are welcome — send us your drawings or sample and we will confirm feasibility. Customisation typically requires a minimum order quantity, which we can confirm based on the specific changes requested.

The standard configuration is optimised for horizontal installation with the register facing upward. Vertical installation is available on request and should be specified at order stage, as the internal flow channel and impeller may be adjusted for vertical orientation. Installing a horizontal-optimised meter vertically can affect accuracy, particularly at low flow rates.

The standard cold water version operates from 0.1 °C to 30 °C with a maximum admissible pressure (MAP) of 16 bar. A 10 bar version is also available. For hot water applications up to 90 °C, a dedicated high-temperature version can be supplied. Pressure loss at permanent flow Q3 is ≤ 0.063 MPa, which minimises head loss in the system.

R200 gives a wider range ratio and a lower minimum flow, which is useful where small leaks need to be detected or where billing accuracy at low flow matters. R160 is the standard and covers most domestic metering requirements. Our team can advise once we know the flow profile of the installation, including typical minimum night flow and peak demand.

Yes. The meter can be supplied with a pulse output for connection to existing AMR systems, or with an integrated communication module for direct AMI connectivity. Supported protocols include M-Bus (wired), LoRaWAN and NB-IoT. The mechanical measuring element is independent of the communication module, so the meter continues to measure accurately even if the communication link is interrupted.

Very little. There is no battery, no external power and no wearing parts exposed outside the measuring chamber. Routine checks include verifying that the meter remains full of water, inspecting for leaks at connections, and confirming the register is clear and readable. In normal potable water service, the meter is designed to maintain accuracy for the full verification period without intervention.

In normal potable water service, a liquid sealed multi jet meter is expected to maintain Class 2 accuracy well beyond the mandatory verification interval. Many utilities operate on a 6-year or longer replacement cycle. For utilities with scheduled testing programmes, sampling meters at the end of the nominal service life is the recommended approach to determine whether replacement is necessary. Water quality, flow profile and installation conditions all influence actual service life.