Diehl Metering: Water and thermal energy meters with remote reading systems

Diehl Metering supplies water and thermal energy meters, communication modules and reading systems for utilities and building operators.

Summary

Best for
Utilities and building operators selecting complete meters and the infrastructure to collect consumption data.
Less suited to
Assuming an RS485 option speaks Modbus or that every radio version uses the same network.
Deployment
Installed water or heat meters, selected communication interfaces, and mobile or fixed reading infrastructure.
Data in
Measured water volume or thermal energy, plus optional pulse inputs on supported instruments.
Pricing
Pricing was not established from the reviewed technical sources; request a quote for the exact configuration.

Overview

Diehl Metering supplies instruments for measuring water and thermal energy together with the communications needed to read them remotely. Its heritage traces the development from mechanical water meters to ultrasonic instruments and IZAR reading systems. This is a meter-and-network supplier, rather than simply a manufacturer of temperature probes or generic radio nodes.

Two useful starting points are HYDRUS 2.0 for water and SHARKY 775 for thermal energy. Their communication options differ by instrument and order configuration. Comparing these options early helps match the meter to a building's wired collection system, mobile reading process or wider fixed radio network.

Offering

The HYDRUS 2.0 datasheet separates water measurement from several ways of collecting readings. Its options include wired M-Bus, pulse outputs and radio variants. Optical access supports local reading and configuration with the manufacturer's tools. An installation can therefore have a local service interface and a different routine collection path.

The SHARKY 775 datasheet describes a compact ultrasonic energy meter with optional communication and signal modules. Listed options include M-Bus, serial interfaces, pulse inputs and outputs, and analog outputs. These modules serve different jobs: importing a pulse count, exporting a consumption value or feeding a control-system signal are separate functions that need to be specified for the project.

Products and platforms

  1. IZAR

    Meter reading systems

    Mobile and fixed reading infrastructure documented in company history.1

Technology

An important integration detail appears in the SHARKY 775 documentation: the RS485 option uses the M-Bus protocol. The connector's electrical standard therefore does not establish Modbus compatibility. A gateway must understand the documented protocol as well as support the physical connection.

For HYDRUS 2.0, the manufacturer distinguishes OMS radio, mioty and LoRaWAN variants and their security arrangements. Radio keys, network configuration and telegram format are part of the integration task. These differences are especially relevant when reusing an existing meter: identifying its exact communication version is more informative than assuming all meters with the same front-panel name can join the same receiver or gateway.

Markets

Diehl Metering's locations overview describes development and production across meters, communications and reading systems. Ansbach covers thermal energy, water and measurement components, while Nuremberg specializes in electronics, communications and systems. Other locations support regional production and service needs. This combination suits projects in which field meters and data collection are procured as a coordinated system.

Its Polish production announcement identifies HYDRUS and SHARKY as major product families and describes additional assembly capacity. For a buyer, the practical comparison is between water-volume measurement and thermal-energy measurement, followed by the reading network. Neither a radio temperature sensor nor a pair of diagnostic pipe probes is automatically a substitute for the corresponding consumption meter.

Company

Diehl Metering's 2024 sustainability report identifies Nuremberg as its global headquarters. The locations page also calls Ansbach a headquarters location and describes its manufacturing role. The headquarters fact above follows the divisional description in the report, rather than treating every operating location as the same corporate address.

The company heritage begins with the Neptun foundry in 1862, later renamed Hydrometer. The business joined Diehl Group in 2003, and the Diehl Metering name was adopted across the business units in 2008. The founding date is therefore a predecessor-history date, not the incorporation date of every present-day national subsidiary.

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References

  1. Diehl Metering predecessor and business history (opens in a new tab)
  2. Diehl Metering operating locations (opens in a new tab)
  3. SHARKY 775 technical datasheet, August 2025 (opens in a new tab) (PDF)
  4. HYDRUS 2.0 technical datasheet, current German-market edition (opens in a new tab) (PDF)
  5. Diehl Metering sustainability report 2024 (opens in a new tab) (PDF)
  6. Diehl Metering production expansion in Poland (opens in a new tab)

This profile does not imply a commercial relationship with Diehl Metering and may contain inaccuracies.