GWFcoder® technology:

Transfers the effective meter reading. The readout value in the billing system and the invoice are the same as the meter reading.

Pulse transfer:

The potential sources of error for a reproduced meter reading with pulse transmission are:

• Bouncing
• Backflow water
• Temporary signal interruption
• Double pulses
• Incorrect pulse value

The readout value in the billing system and the invoice may differ from the meter reading.

GWFCoder Applications

Wireless pit readout

Meter with GWFcoder® register, IEC interface and GWF radio module (type RCM-PI) is read out by radio using a mobile infrastructure.

GWFRead Mobile – Wall pad reading

Encoder meters with a wall pad can be read without entering the property by means of an inductive wall pad. The meter data is then automatically assigned to the customer. The meter readout device then transmits this data wireless via Bluetooth to the Mobile readout
device.

M-Bus remote reading

The meters with GWFcoder® registers and M-Bus interfaces are connected to an M-Bus remote reading system. This ensures that the meter data is transferred directly via an M-Bus data centre or level converter to a PC where the data is further processed.

Mobile on-site reading

■ Direct or outside wall readout via the inductive interface; transmission distance of up to max. 150m

■ Outside wall readout via the CL interface without access to the measuring point; transmission distance of up to max. 150m

■ Mobile «walk-by» meter reading or «driveby » meter reading from a moving vehicle without access to the property

Remote meter reading

■ The GWFcoder® technology enables the combined remote reading of water, gas and electricity meters

■ Depending on the interface at the communication unit (e.g. modem), various interfaces (interface converter) are available to integrate the GWFcoder® water and gas meters in the remote meter reading and to read out the meters with addresses according to IEC standards

GWFCoder Variants

The metering application dictates which unit is the most suitable for any installation. Suitable units are shown below for domestic and bulk, gas and water metering applications.

GWF Coder Technology

In the GWFcoder® system, the individual rollers of the mechanical register are read out optoelectronically. The position of the various long asymmetrically arranged slits in the roller counters is scanned using 5 light barriers (light-pipe transmitter and receiver).

The light barriers are implemented with phototransistors. LEDs, and light conductors, which are all consecutively scanned and evaluated. The precisely defined position of each individual roller counter is encoded as an absolute roller counter reading and read out as a part of the protocol via the GWFcoder® interface.

This functioning principle is patented by GWF. The GWFcoder® interface, compared to a meter with a pulse output, has an incomparably higher level of information content and readout accuracy. A GWFcoder® register does not require a battery, which, in turn, does not compromise existing revision cycles. The readout device supplies the power for the readout.

GWFcoder smart metering technology

They offer trendsetting smart metering system solutions based on high-precision measuring instruments and the patented GWFcoder® technology.

The GWFcoder® technology can be fitted to a wide range of meters from the simple single jet water meter to turbine type water and gas meters

With the ever increasing demand for intelligent remote data collection the GWFcoder® m-bus interface opens up a world of data transport possibilities

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.

JS 15 & 20 Class B Hot & Cold Water Meters

Compact design suitable for most secondary metering applications and small bore water volume measurement tasks. Frost resistant dial, tamper proof mechanism & pulse output option. Water Meter Dial rotates 360° for easy viewing.

Available with a range of pulse output values. 

JS Flanged Class C Cold Water Meter

Horizontal or Vertical Installation

A competitively priced range of single-jet mechanical totalising water meters available in sizes: DN50, to DN150 (2″ – 6″) with pulse output options. Very accurate low flow measurement it is suitable for a variety of commercial & general purpose metering applications.

MWN Class B Hot & Cold Water Meters

Horizontal or Vertical Installation

A competitively priced range of Woltman mechanical totalising water meters available in sizes: DN40 – DN300 (1.5″ – 12″), with pulse output options. Suitable for a variety of commercial & industrial metering applications, the hot water version is 130C rated

JS25 30 & 40 Class B Hot & Cold Water Meters

Horizontal or Vertical Installation

A competitively priced range of multi-jet mechanical totalising water meters available in sizes: 1/2″ to 1.5″,
with pulse output options. Suitable for a variety of commercial & general purpose metering applications.

The JS Cold Water Meter can be mounted horizontally or vertically, the hot water version is 130C rated

This year we have extended our catalogue to include range of hot and cold water metering products from GWF. These water meters are based around M-Bus technology and provide that as an output in a particular installation. Also we are stocking and supplying Elster Metering QA Turbine Gas Meters with Pulse Output and QAe Digital Turbine Gas Meters with M-Bus Output.

A brief synopsis of those products is shown below. For further details, including prices, please call us 01773 534555.

Elster QA Quantometer Turbine Gas Meters (Aluminium Body) – The wafer type housing of QA is made of aluminium. The volume is displayed on a Mechanical Totalizer for QA Version or Digital for QAe Version with M-Bus Option	GWF MTKCODER M-Bus – Multi-jet screwed cold water meters H Mounting 30ºC
GWF MTWCODER-VF (VerticalRiser) vs (Vertical Down-pipe) Multi-jet screwed hot water M-Bus	GWF UNICOCODER M-BUS – Single-Jet Screwed hot water meters H/V mounting 90ºC

We are proud to be working along side APATOR POWOGAZ S.A as it is one of the largest Polish and European manufacturers of water meters. Their strong market position is attributable to their expertise based on an 80-year tradition.

With a wide range of products, you can now benefit from top quality water metering equipment and a variety of over 400 solutions, supported by a professional and friendly assistance provided by their qualified factory staff.

To See Our Water Meter Section For More Info

We have a large stock number of cold water meters and hot water meters waiting to be ordered. Please call our sales team who are waiting for your call!!!