Water and gas meters with GWFCoder® register are ideal for future upgrading to remote, mobile or direct readout technologies. Examples of the various options are provided below:

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.