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Metrys The Metrys wordmark, set in a high-contrast swash serif.
A Metrys single-jet water meter with a copper-and-glass register in a grey housing, lid open.
The dial of a Metrys single-jet water meter with a copper-and-glass register, seen from above with the grey lid open.
A Metrys single-jet water meter with a copper-and-glass register seen from the side, grey lid open, on a black body with threaded ends.
A Metrys single-jet water meter with a copper-and-glass register, lid closed, in a grey housing on a black body with a cast flow arrow.
Single-jet water meter, drawn illustration

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A Metrys single-jet water meter with a copper-and-glass register in a grey housing, lid open.
The dial of a Metrys single-jet water meter with a copper-and-glass register, seen from above with the grey lid open.
A Metrys single-jet water meter with a copper-and-glass register seen from the side, grey lid open, on a black body with threaded ends.
A Metrys single-jet water meter with a copper-and-glass register, lid closed, in a grey housing on a black body with a cast flow arrow.
Single-jet water meter, drawn illustration

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Water meters SJ-R160-CG

Single Jet Water Meter, Copper and Glass Register

A single-jet meter with a copper and glass register, to 90 °C.

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″ DN32 1¼″ DN40 1½″

Documents

Download datasheet (Opens in a new tab)

Overview

Why buyers choose it

  • A register built for heat

    Copper and glass rather than plastic, so it stays clear at 90 °C instead of crazing at 50 °C.

  • Resolves to 0.05 litres

    Fine enough to compare two readings and see a slow loss, not just a month's consumption.

  • No straight pipe needed

    U0 D0, so it fits where the pipework already is rather than needing a run built for it.

  • Antimagnetic drive

    A magnet held to the body does not slow or stop the register.

In detail

Plastic register covers craze and yellow above about 50 °C, which is why hot-water meters that were specified as cold-water meters end up unreadable. This one uses a copper housing and a glass window, so the register survives the duty it is sold for: cold water from 0 °C, hot water to 90 °C.

It is a single-jet meter — water enters the chamber through one tangential port — which makes it simpler and shorter than a multi-jet of the same bore, and easier to fit where the pipework was not designed around a meter. It reads to a resolution of 0.05 litres over a 99 999 m³ dial, and needs no straight pipe upstream or down.

The dial is vacuum sealed and rotates through 360°, the drive is magnetic and antimagnetic, and the meter holds class 2 accuracy at an R160 turndown across DN15 to DN40. It is declared for horizontal installation.

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 Single jet, dry dial, copper and glass, vacuum sealed
Maximum permissible error, Q1 to Q2 ±5%
Maximum permissible error, Q2 to Q4 ±2% for water having a temperature ≤50℃; ±3% for water having a temperature >50℃
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 T50

Approvals

Standards ISO 4064, OIML R49

Dimensions and installation

Length 110 mm Height 80.5 mm
Schematic, not to scale
Connection thread G3/4" B
Length 110 mm
Weight 0.28 kg
Orientation limitation Horizontal
Height 80.5 mm
Width 80 mm

Parts

Parts of a single-jet meter

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

Parts of a single-jet meter, drawn illustration Exploded illustration of a single-jet water meter's parts, numbered top to bottom: 1 lid, 2 register, 3 register seal, 4 measuring chamber, 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 Single jet, dry dial, copper and glass, vacuum sealed

  3. Register seal

    Seals the register housing against water ingress.

  4. Measuring chamber

    Directs the single tangential jet onto the impeller.

  5. Impeller

    Turns with the jet of water 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 Single Jet Water Meter, Copper and Glass Register.

Approvals and certificates

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