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Metrys The Metrys wordmark, set in a high-contrast swash serif.
A Metrys R160 multi-jet water meter with a brass register ring and liquid-sealed number wheels on a blue body.
The DN15 size of a Metrys R160 multi-jet semi-liquid sealed water meter, with a brass register ring and the lid open over the dial.
The DN50 size of a Metrys R160 multi-jet semi-liquid sealed water meter, with large brass threaded connections on a blue body.
Multi-jet water meter, drawn illustration

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A Metrys R160 multi-jet water meter with a brass register ring and liquid-sealed number wheels on a blue body.
The DN15 size of a Metrys R160 multi-jet semi-liquid sealed water meter, with a brass register ring and the lid open over the dial.
The DN50 size of a Metrys R160 multi-jet semi-liquid sealed water meter, with large brass threaded connections on a blue body.
Multi-jet water meter, drawn illustration

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Water meters MJ-R160-SL

R160 Multi Jet Semi-Liquid Sealed Water Meter

A multi-jet meter whose reading stays legible, DN15 to DN50.

Nominal size
DN15
Q3 permanent flow
2.5 m³/h
R value (Q3/Q1)
160
Accuracy class
2

Select nominal size (DN)

Specifications update with the selected size.

DN15 ½″ DN20 ¾″ DN25 1″ DN40 1½″ DN50 2″

Documents

Download datasheet (Opens in a new tab)

Overview

Why buyers choose it

  • The reading stays readable

    Only the number wheels sit in liquid, so they stay sharp without the whole dial discolouring the way a fully wet register does.

  • Even wear on the bearings

    Several inlet ports push the impeller evenly, which is why a multi-jet holds its accuracy rather than drifting off it.

  • R160 at class 2

    Turndown and accuracy class declared together, so the low-flow claim is one a committee can check.

  • DN15 to DN50 on one page

    A society connection and its bulk inlet are the same meter in two sizes, which keeps a spares holding small.

In detail

The reason meters get replaced is rarely that they have stopped measuring. It is that nobody can read them. A dial that has fogged, silted or corroded is a meter that gets estimated instead of read, and an estimated bill is a dispute waiting to happen.

This meter seals the number wheels alone in liquid rather than flooding the whole register. The wheels stay clean and sharp, while the rest of the register stays dry — which avoids the classic failure of a fully wet dial, where the liquid discolours over a few summers and the meter becomes as unreadable as the dry one it replaced.

It is a multi-jet arrangement: water enters the measuring chamber through several ports around its circumference, so the impeller is pushed evenly and its bearings wear evenly. That is what lets a multi-jet hold class 2 accuracy across an R160 turndown for its whole service life, at DN15 through DN50 with permanent flows from 2.5 to 25 m³/h.

Technical specifications

Selected size: DN15

Values shown apply to the selected size. A dash means the figure is not stated.

Metrological

Nominal size DN15
R value (Q3/Q1) 160
Accuracy class 2
Register type Multi jet, semi-liquid sealed
Maximum permissible error, Q1 to Q2 ±5%
Maximum permissible error, Q2 to Q4 ±2% for water having a temperature ≤30℃
Indicating range 99,999
Resolution of indicating device 0.00005

Hydraulic

Q3 permanent flow 2.5 m³/h
Q1 minimum flow 0.015625 m³/h
Maximum working pressure 16 bar
Pressure loss class ΔP63
Q2 transitional flow 0.025 m³/h
Q4 overload flow 3.125 m³/h
Flow profile sensitivity class U0 D0

Environmental

Temperature class T30

Approvals

Standards ISO 4064, OIML R49

Dimensions and installation

Length 115 mm Height 104 mm
Schematic, not to scale
Connection thread G3/4" B
Length 115 mm
Weight 1 kg
Orientation limitation Horizontal
Height 104 mm
Width 99 mm

Parts

Parts of a multi-jet meter

How a meter of this type is built, and what this model is made of.

Parts of a multi-jet meter, drawn illustration Exploded illustration of a multi-jet water meter's parts, numbered top to bottom: 1 lid, 2 register, 3 register ring/seal, 4 measuring chamber insert with its jets, 5 impeller, 6 strainer, 7 body, 8 tailpieces/connections. 1 2 3 4 5 6 7 8
Illustrative: how a meter of this type is built. This model's own materials and figures are in the table and its specifications.

  1. Lid

    Caps the register and keeps water and debris off the dial.

  2. Register

    Totalises and displays the water passed.

    Register type Multi jet, semi-liquid sealed

  3. Register ring / seal

    Seals the register housing against water ingress.

  4. Measuring chamber insert (with jets)

    Directs several jets onto the impeller from multiple sides for balanced, even wear.

  5. Impeller

    Turns with the combined jets and drives the register.

  6. Strainer

    Screens out grit and debris before the measuring element.

  7. Body

    Houses the measuring element and carries the flow.

  8. Tailpieces / connections

    Threaded couplings that join the meter to the pipework.

    Connection thread G3/4" B

Download centre

Everything you need to specify.

Documents for the R160 Multi Jet Semi-Liquid Sealed Water Meter.

Approvals and certificates

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