REDAC Wireless Woltman Water Meter Type EMS-APT-MWN-NUBIS-IP65REG-IMP-REDAC-RADIO

The REDAC wireless Woltman water meter (model EMS-APT-MWN-NUBIS-IP65REG-IMP-REDAC-RADIO) is a dry-dial Woltman-type turbine water meter with a horizontal impeller axis, featuring a REDAC wireless adapter (model EMS-RPA-1-REDAC) factory-connected to the pulse output.

The Woltman water meters of the Nubis series impress with consistent, continuous development in which the most modern constructive and technical solutions have been incorporated. As a result, the Woltman water meters from the Nubis series not only have a particularly long service life, but these devices are also characterized by their exceptional durability.

Due to the special construction of the counter, the Woltman counters in the Nubis series are also highly resistant to the potential effects of strong magnetic fields. Another important point for use in practice is the fact that the devices in the Nubis series are extremely flexible. The Nubis series Woltman meters are manufactured and designed based on the MID guidelines in accordance with EN 14154, ISO 4064 and OIML R49. The measuring range of these meters is designed for applications up to a range ratio of R200 and therefore these meters are also suitable for a wide variety of operating conditions.

Application range of Woltman water meters (type EMS-APT-MWN-NUBIS-IP65REG-IMP-REDAC-RADIO)

The Nubis series Woltman water meters are designed for use in industrial supply networks and are suitable for measuring both cold and hot water consumption. They cover temperature ranges of up to 50°C for cold water and up to 130°C for hot water. Particular emphasis is placed on efficient operation; consequently, the NUBIS series meters are engineered for low pressure loss. This ensures reliable measurement—even with relatively constant and comparatively high flow rates—without placing unnecessary additional strain on the piping system. The maximum permissible operating pressure is 16 bar, enabling their use in demanding installations and operating conditions.

Installation positions and mounting

The design allows for installation in horizontal water supply systems, optionally with:

• upward-facing counter (H) or
• sideways-facing counter (H)

Vertical installation is also possible. In this case, installation is carried out with the counter (V) facing sideways. This means that the meter can be flexibly adapted to the respective structural conditions.

Darüber hinaus ist auch eine vertikale Installation möglich. In diesem Fall erfolgt der Einbau mit seitwärts gerichtetem Zählwerk (V). Damit lässt sich der Zähler flexibel an die jeweiligen baulichen Gegebenheiten anpassen.

Reading the meter readings

The use of a rotary counter enables simple manual reading of the meter values ​​directly from the dial, even in various mounting positions. This simplifies operational monitoring and supports maintenance or meter-reading processes.

The pulse generator for the Woltman meter type MWN Nubis

The pulse transmitter for the MWN Nubis Woltman water meter serves as a key interface for remote reading and for integrating the meter into modern remote reading systems, such as the MT-REDAC radio system. The transmitter converts the measurement data captured by the water meter into electrical pulses that represent water consumption based on volume. This creates a simple, robust, and easily integrated foundation for the digital recording of consumption data.

In practice, this means that as soon as water flows through the meter and the meter registers the corresponding volume, the pulse transmitter continuously generates pulses at a defined interval. These signals can then be processed by suitable evaluation devices or communication modules, such as the EMS-RPA1-REDAC radio pulse adapter. This enables reliable transmission and system-based analysis of consumption data without the need for direct manual on-site reading.

The pulse generator of the MWN Nubis Woltmann bulk water meter ensures that the measurable water flow is not only recorded locally but can also be systematically transmitted into modern data acquisition chains. This establishes the foundation for reliable consumption accounting and future-proof integration into existing infrastructures.

The image shows the pulse generator, which takes the form of an encapsulated reed contact positioned in the immediate vicinity of the counter mechanism or the roller containing the magnet.

The REDAC radio pulse adapter EMS-RPA-1-REDAC

The EMS-RPA1-REDAC radio pulse adapter is designed to capture pulse data from the connected EMS-APT-MWN-NUBIS Woltman water meter and transmit it wirelessly to the EMS-REDAC radio system. In essence, the EMS-RPA-1-REDAC adapter captures the pulses emitted by the Woltman water meter, totals them, and multiplies the result by the programmed pulse value. Furthermore, the physical unit of the measured medium is stored within the EMS-RPA-1-REDAC adapter.

At specific, predefined time intervals, the EMS-RPA-1-REDAC Radio Pulse Adapter then transmits radio telegrams containing the stored consumption values ​​to the nearest radio data collector (EMS-DACOS) within the EMS-REDAC wireless network.

The EMS-RPA-1-REDAC radio pulse adapter enables remote reading without a direct cable connection between the meter and the readout system.

This makes the EMS-RPA-1-REDAC radio pulse adapter particularly suitable for scenarios involving the retrofitting of existing metering points or where wireless integration offers economic and organizational advantages.

The EMS-RPA-1-REDAC radio pulse adapter processes the meter’s pulse signal and converts it into corresponding transmission data—specifically, EMS-REDAC radio telegrams. These are then transmitted via the designated wireless link to the EMS-REDAC radio system, allowing consumption data to be reliably transferred to the EMS-REDAC remote reading and data acquisition system.

Wireless transmission reduces installation and maintenance efforts by eliminating—or at least significantly simplifying—complex cabling requirements. At the same time, the metering point retains its basic functionality, as the adapter merely evaluates and forwards the pulse signal. Depending on the configuration, the EMS-RPA-1-REDAC radio pulse adapter supports integration into existing consumption monitoring systems, helping to make data collection more efficient, reliable, and future-proof.

In practice, the EMS-RPA-1-REDAC radio pulse adapter is thus an ideal solution for smart sub-metering applications based on pulse or counting signals. It creates an interface between the metering device and a wireless remote reading system, enabling the secure capture and provision of consumption data for further analysis, even within complex system structures.

Technical data for the wireless pulse adapter, type EMS-RPA-1-REDAC

General specifications of the EMS-RPA-1-REDAC wireless pulse adapter

Technical specifications of the pulse input for the wireless pulse adapter type EMS-RPA-1-REDAC

The IP protection class of the EMS-REDAC wireless Woltman water meter, type EMS-APT-MWN-NUBIS-IP65REG-IMP-REDAC-RADIO

IP65-rated water meters are particularly well-suited for environments requiring enhanced robustness and resistance to dust and water.

They are ideal for operation under demanding environmental conditions where the device requires additional protection against the ingress of water and dust. In addition to being equipped with a pulse transmitter, the MWN Nubis series Woltman water meters—available in an IP65 version or with an IP65 register—can also be operated with optical and inductive communication modules from the EMS-APT-KOM-MOD series, thanks to their integrated inductive or optical encoder discs.

Cross-section of a Woltman large-scale water meter Type EMS-APT-MWN-NUBIS-IP65ZW-IMP-REDAC-RADIO

Reliability of the Woltman water meter EMS-APT-MWN-NUBIS-IP65ZW-IMP-REDAC-RADIO

The EMS-APT-MWN-NUBIS-IP65ZW-IMP-REDAC-RADIO Woltman water meter stands out due to its proven, robust design, engineered for reliable performance in daily operation. Key factors contributing to its high performance and long service life include the use of modern materials and the sophisticated engineering of critical components.

Service life is extended by manufacturing high-wear components—such as bearings and pivots—with superior wear resistance. Additionally, the meter features an optimized surface structure specifically designed to minimize flow resistance. This ensures highly efficient impeller operation, while the sealing plate supports a stable and durable seal. The design also incorporates a hydrodynamically balanced impeller; this significantly contributes to smooth, stable measurement and enhances overall performance throughout the meter’s lifecycle.

To ensure that mechanical stresses do not compromise the counting mechanism, the unit is effectively protected against mechanical damage.

In addition, conformity with the following norms and standards applies:

• EN 14154-1:2005+A2:2011 (General requirements)
• EN 14154-2:2005+A2:2011 (Installation and conditions of use)
• EN 14154-3:2005+A2:2011 (Test methods and equipment)
• EN ISO 4064-1:2017 (Metrological and technical requirements)
• EN ISO 4064-2:2017 (Test methods)
• EN ISO 4064-5:2017 (Installation conditions)

Furthermore, relevant documentation for the meter is available, including:

• EU type-examination certificate (cold water)
• Certificate from the national hygiene institute and WRAS (for the materials used in type MWN 5, demonstrating approval for contact with drinking water)
• Climatic environmental condition classification: Class B in accordance with EN-ISO 4064-1:2014(E)
• Mechanical environmental requirement classification: Class M1 in accordance with Directive 2014/32/EU
• Electromagnetic environmental requirement classification: Classes E1, E2 in accordance with EN-ISO 4064:2014 and Directive 2014/32/EU

Cross-section of a Woltman large-scale water meter with a horizontal impeller axis (parallel Woltman, WP type)

Pressure loss diagram off Woltman Water Metrers in the MWN Nubis Series

Typical error curve for the MWN Nubis series Woltman water meters.