Meitwin

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PDF Datasheet

Water

Combined meter for cold water up to 50 °C

Water

Drinking Water

Mechanical

Smart City

Measurement from the lowest to the highest flow rates:
Improved cost efficiency
Removable measuring insert consisting of the main meter, bypass meter, and changeover valve:
Ensures retrofit capability and easy replacement
One measuring insert for all housing sizes:
Reduced inventory costs

Measurement of high and highly fluctuating flow rates, for example:
- Commercial and industrial facilities
- Schools and sports complexes
- Apartment buildings
- Hotels
Designed for pipeline dimensions specified for fire protection water demand.

IP68 flood-proof GWFcoder® register for both the main and bypass meters with IEC or M-Bus interface, 5 m cable, and one mounting position for an HRI-Mei pulse transmitter
High-resolution HRI-Mei pulse transmitter
Documentation: HRI-Mei
High-resolution Opto OD pulse transmitter
Documentation: Opto OD

Installation manual Flange Dimensions Table (German)

Achieves one of the widest known measuring ranges while maintaining defined low error limits.
Example: DN 80, Q₁ = 16 l/h, Q₃ = 120,000 l/h, Measuring range 1:7500
Universal installation position
No upstream straight pipe section required
Maximum operating pressure: PN 16 bar
Temperature up to 50 °C
Hydrodynamically balanced main meter impeller
Available in the standard installation lengths for Woltman (WS) meters
Optimum corrosion protection through powder coating
Starting flow rate approx. 2 l/h
Common protective cover for the main and bypass meters
Spring-loaded changeover valve with low pressure loss
Minimum upstream pressure of 0.5 bar required
SVGW certified
Complies with the European Measuring Instruments Directive (MID)
IP68 flood-proof pulse register for both the main and bypass meters, each with one slot for an Opto OD pulse transmitter and one mounting position for an HRI-Mei pulse transmitter


Nominal diameter	DN	mm	50	65	80	100
Nominal pressure	PN	bar	16	16	16	16
Permanent flow rate	Q3	m3/h	50	70	120	180
Overload flow rate (1 × 24 h)	Q4	m3/h	90	120	200	280
Transition flow rate (±2%)	Q2	m3/h	0,012	0,012	0,012	0,012
Minimum flow rate (±5%)	Q1	m3/h	0,006	0,006	0,006	0,006
Changeover point (increasing flow)		m3/h	2,0-2,6	2,0-2,6	2,0-2,6	2,0-2,6
Changeover point (decreasing flow)		m3/h	1,1-1,7	1,1-1,7	1,1-1,7	1,1-1,7
Maximum temperature		max.°C	50	50	50	50

Dimensions and Weights
Installation length	L	mm	270	300	300	360
Height	H	mm	250	250	250	250
Height	h	mm	80	92,5	100	100
Measuring insert installation height	g	mm	505	505	505	505
Width	B	mm	185	185	210	220
Meter weight		app. kg	23	24,6	26,1	31
Measuring insert weight		app. kg	7	7	7	7

Main meter housing	Cast iron
Bypass meter housing	Brass
Measuring insert	Plastic
Impeller	Plastic
Spring-loaded changeover valve	Plastic / Stainless steel

When commissioning the meter, always fill the pipeline slowly with water to ensure gradual venting of the system.

Meter size	DN 50...100 1 pulse = ... litres
Meitwin main meter	10 100
Meitwin bypass meter	1 10

Meter size		DN 50...100 1 pulse = ... litres
Meitwin main meter	Opto OD 01 Opto OD 03	1 10
Meitwin bypass meter	Opto OD 01 Opto OD 03	0,1 1

Last updated: 27.07.2026

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