DMS now offer the range of Elster QA Turbine Meters; they hold comprehensive stocks of Elster QA Turbine meter from 1″ to 6″ (DN25 to DN150)

QA Turbine Meter Specification

The wafer type housing of QA and QAe (with electronic totaliser) is made of aluminium. Depending on the version, the volume is displayed on a mechanical (QA) or an electronic totaliser (QAe). QA and QAe Quantometers combine the high accuracy of the Q series of Quantometers with low weight.
The Quantometers are available in a number of flow ranges, diameters and pressure ratings. Depending on the version, a low or medium-frequency pulse transmitter and an optical readout or an optical readout with additional M-bus output is available.

All of the Quantometers are DVGW approved.
For special industrial applications, stainless steel versions are also available.

QA Turbine Meter Family

Any installation of the above products must be carried out by an approved Gas Safe Engineer

European Directive 2004/22/EC is aimed at harmonising the regulations and classifications in the area of water metering across Europe. With effect from 30th October 2006 it replaces all European directives and national regulations making it necessary for all water meters to meet the standard of NF EN14154 and/or recommendation OIML R49.

So what does this mean in practice? Well it changes the baseline that is used to define the metering performance of a water meter.

A water meter is now defined by:

• Q3 : Continuous flowrate
• R : Q3/Q1 ratio (where Q1 is the flowrate)

Secondary characteristics are:

• Q2 : The transition flowrate given by Q2/Q1
• Q4 : The overload flowrate given by Q4/Q3

This means that the possible values of Q3 (measured in cubic metres) and R are:

Can you still buy and fit class A, B & C water meters?

Yes for 10 years at the most as products approved before the MID (Oct 2006) were approved for a 10 year period.