Main characteristics

• The main meter and the by-pass meter are arranged one behind the other in the direction of flow.
• There is no longer any need for the differentiation between the “by-pass meter on the right” and “by-pass meter on the left”.
• No straight upstream or downstream pipe necessary due to integrated flow straightener (U0D0).
• Removable metrological unit consisting of the main meter, the change-over valve and the by-pass meter (“3 in 1” concept).
• A multirange metrological unit allows an easy economical replacement after the validity period of the calibration has expired.
• Main meter with hydrodynamic balanced rotor.
• Spring-loaded change-over valve with low headloss and extended lifetime.
• By-pass meter specified as a piston meter cartridge 612MTW-HRI with plug-in non-return valve, register copper/glass, protection class IP68.
• Minimum flowrate: 6 l/hour for piston type by-pass meter.
• Available in body lengths specified as per DIN 19625 and ISO 4064.

Applications

Measurement of high flow rates with extremely wide spread flow profile Measurement of very small flow rates for leakage detection Ideal for fire service pipes

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Options

Optional by-pass meter:

612MTW-ER56, piston type meter with Encoder register, protection class IP68

612MTW, piston type meter with plastic register casing, protection class IP65

Main and by-pass meters fitted with pulse and data interface HRI-Mei and/or pulsers type OD (with by-pass meter 612MTW-HRI)

Main and by-pass meters equipped with Encoder register ER56 for direct meter reading via data protocol (M-Bus, Sensus, IEC 1107)

Spool piece for extension of meter casing as per DIN 19625

Port for ¼" pressure sensor

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Pulse Values

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Technical Data

Typical Accuracy Curve and Typical Head Loss Curve

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Dials and By-Pass Meters

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