Zenner

What Zenner does

ZENNER International GmbH & Co. KG is a privately held German manufacturer of smart metering hardware for water, thermal energy (heating and cooling), and gas, headquartered in Saarbrücken, Germany. The company is described in its own materials as a world leader in the production of these three meter categories and operates a sales and distribution network spanning more than 100 countries, reaching municipalities, water suppliers, energy suppliers, real estate companies, and industrial customers.

The product portfolio centers on a comprehensive family of measurement devices, including residential and commercial water meters (single-jet, multi-jet, rotary piston, and Woltman variants across the MTKD, MNK, RNK, RTKD, IUW, and IUWS series), thermal energy meters under the zelsius C5 platform (IUF ultrasonic, CMF capsule, and ISF single-jet variants), and Atmos-brand diaphragm gas meters for residential (G1.6-G4) and commercial (G6-G40) capacities, with stated annual gas meter production exceeding 5 million units. Differentiated technology is delivered through the B.One sub-brand, which provides EDC and PDC communication modules supporting LoRaWAN, wireless M-Bus, wired M-Bus, and NB-IoT connectivity, enabling remote reading without property access, leak detection at the utility level, and integration into smart city and building management infrastructures. The portfolio is supported by accessories such as temperature probes, ball valves, compensating pieces, and the Multidata WR3 modular digital unit for energy meters.

The business model is a B2B hardware sales operation distributed via direct enterprise field sales to utilities, municipalities, and large real estate accounts, complemented by a global channel partner network. Pricing is not publicly disclosed and is handled through direct inquiry. Revenue is generated across five hardware streams: water meters, thermal energy meters, gas meters, IoT/smart metering solutions, and sensors and accessories, with European markets — particularly Germany and the surrounding region — served directly since 2021. The company operates as a GmbH & Co. KG partnership structure with no disclosed parent company, institutional investors, or external funding rounds, and no executive leadership or financial performance data is publicly available in the source material.

Name

Zenner

Legal name

Zenner International GmbH & Co. KG

Website

https://zenner.es

Company type

Private

Founded year

1990

Operating status

Operating

Headcount range

1–10 employees

Short description

Zenner International is a German manufacturer of smart metering hardware for water, thermal energy, and gas, selling in over 100 countries to municipalities, utilities, real estate firms, and industrial buyers via direct enterprise sales and a global channel partner network.

Ownership category

akta.pro rank

Product category

Smart Metering and Utility Measurement

NAICS

Totalizing Fluid Meter and Counting Device Manufacturing (334514), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512), Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415)

SIC

Totalizing Fluid Meters & Counting Devices (3824), Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

AMI/AMR Smart Meter Deployment & Operations (Head-End, Network & MDM) (EUAJACAD)

akta.pro secondary industries

Meter Data Management & Analytics (MDM, validation/estimation/editing, usage insights) (EUANAIAB), Meter Reading Services (Manual, AMR/AMI Operations & Validation) (EUAJAKAC), Smart Energy Management (Meters, EV Chargers, Solar/Battery Monitors) Retail (CRACAGAI), Heat Pump & Smart HVAC Controller Integration (HSAOANAD), Environmental Sensors (Temperature/Humidity/Gas/Air Quality) (HDAHALAD)

Keywords

• Smart metering solutions
• Water meters
• Thermal energy meters
• Gas meters
• IoT communication modules

Headquarters

HQ city

Villaviciosa De Odón

HQ country

Spain

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Technology or R&D, Marketing or Sales, Personnel

Revenue model

1. Water Meters Sales: Sale of residential, commercial, and industrial water meters including volumetric piston, multi-jet, and ultrasonic models for potable water measurement
2. Thermal Energy Meters: Compact and split thermal energy meters for heating and cooling systems measurement, including ultrasonic and mechanical flow sensors
3. Gas Meters: Diaphragm gas meters (Atmos brand) for residential and commercial gas measurement, producing over 5 million units annually
4. IoT/Smart Metering Solutions: Remote reading systems, communication modules, and integrated smart metering solutions enabling data collection and management for utility companies
5. Sensors and Accessories: Smart sensors including smoke detectors, heat cost allocators, and temperature probes, plus mounting accessories and compensating pieces

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Zenner manufactures and sells smart metering hardware and IoT communication solutions for water, thermal energy (heating and cooling), and gas measurement. The portfolio spans residential and industrial water meters (single-jet, multi-jet, rotary piston, Woltman, ultrasonic), thermal energy meters (zelsius C5 series), Atmos diaphragm gas meters, and B.One communication modules supporting LoRaWAN, wireless M-Bus, wired M-Bus, and NB-IoT remote reading protocols for utilities, municipalities, and property managers.

Product overview

ZENNER International is a global leader in smart metering solutions for water, thermal energy (heating/cooling), and gas. The product portfolio centers on a comprehensive family of measurement devices (water meters including MTKD, MNK, RNK, RTKD, IUWS series; thermal energy meters including zelsius C5 series; gas meters under the Atmos brand including G-series and XL commercial models) supported by IoT communication modules (EDC B.One, PDC B.One with LoRaWAN, wireless M-Bus, and NB-IoT). The portfolio includes both residential meters (single-jet, multi-jet, rotary piston types) and industrial/commercial meters (Woltman, ultrasonic, diaphragm gas meters), complemented by sensors (temperature probes, flow sensors), valves, and accessories. Solutions support wired M-Bus, wireless M-Bus, LoRaWAN IoT, and NB-IoT communication protocols for remote reading, with the B.One ecosystem enabling integration into smart city and building management infrastructures for utilities, municipalities, and property management companies.

Differentiator

Problem solved

Functional benefit

Brands

• B.One: IoT gateway and communication module platform for smart metering solutions, including B.One EDC and B.One PDC communication modules.

Products and services

• EDC B.One Communication Module (M-Bus Interface) Communication module with M-Bus interface and electronic pulse output for mounting on ZENNER water meters with modulating disc, enabling remote meter reading.
• EDC B.One Communication Module (LoRaWAN/Wireless M-Bus) Communication module with LoRaWAN or wireless M-Bus interface for remote reading and data transmission from ZENNER water meters.
• PDC B.One Communication Module Pulse module with LoRaWAN or wireless M-Bus interface for connection to ZENNER water meters with pulse output.
• MTKD-N / MTKD-M / MTKDI-N Water Meters Potable water meters with 7-roller register; MTKD-M features electronic sweep and remote data reading capability for residential and commercial potable water measurement.
• IUWS B.One Ultrasonic Water Meter Ultrasonic household water meter for cold water with integrated B.One communication module, providing accurate measurement without moving parts.
• IUW Ultrasonic Large-Volume Water Meter Precise large-volume ultrasonic water meter designed for potable water distribution and industrial high-flow applications.
• WPD / WPHD Woltman Water Meter Woltman meter with turbine axis parallel to flow direction; WPHD prepared for remote reading via M-Bus for industrial and large-utility deployments.
• WSD / WSDE Woltman Water Meter Large-size Woltman water meter for registering high and fluctuating flows in potable water distribution and industrial applications.
• WPVM Compound Water Meter Compound water meter with cartridge meter as secondary meter for potable water supply and industrial applications with wide flow ranges.
• Minomess A B.One Water Meter Capsule water meter with LoRaWAN radio module for remote reading.
• zelsius C5-IUF B.One Thermal Energy Meter Thermal energy meter with ultrasonic flow sensor (IUF) for heating and/or cooling systems with integrated B.One communication module.
• zelsius C5-CMF B.One Thermal Energy Meter Thermal energy meter with capsule measurement sensor (CMF) for heating and/or cooling systems.
• zelsius C5-ISF B.One Thermal Energy Meter Compact energy meter with single-jet volumetric unit (ISF) for heating and cooling measurement.
• Multidata WR3 B.One Digital Unit Modular digital unit for split thermal energy meters, combinable with all volumetric units including ISF flow sensors.
• Atmos Diaphragm Gas Meter (G1.6S, G2.5S, G4S) Atmos brand diaphragm gas meter with high precision and safety for residential and light commercial gas measurement.
• Atmos XL Diaphragm Gas Meters (G6 to G40) Commercial Atmos brand diaphragm gas meter suitable for hotels, restaurants, factories, and other commercial establishments.
• Atmos Diaphragm Gas Meter (G1.6A, G2.5A) Residential Atmos brand diaphragm gas meter for domestic gas measurement applications.
• Atmos WG2.5S Wide-Range Gas Meter Wide-range Atmos gas meter characterized by precise measurement, constant stability, long service life, and high reliability for variable-load applications.

Quantifiable outcome

• Remote reading without property access
• +3 more outcomes

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Engelmann Sensor: Engelmann Sensor is a German heat meter and thermal energy measurement specialist. It competes with Zenner's zelsius thermal-energy meter line for sub-metering and district-heating applications across European residential and commercial buildings.
• Sensus (Xylem): Sensus, a Xylem brand, is a major provider of smart meters and AMI network technologies for water, gas, electricity, and heat utilities. It overlaps with Zenner particularly in water and gas metering for North American and European municipal customers.
• Diehl Metering: Diehl Metering is a German-based direct competitor manufacturing water, heat, and gas meters (including the well-known ultraheat series). It competes head-to-head with Zenner across residential, commercial, and industrial metering, sharing similar European municipal and district-heating customers.
• Kamstrup: Kamstrup is a Danish manufacturer of smart meters for water, heat, electricity, and gas, known for ultrasonic technology. It directly competes with Zenner on ultrasonic water and thermal-energy meters sold to utilities and district-heating operators in Europe.
• Landis+Gyr: Landis+Gyr is a leading global provider of integrated energy management and smart metering solutions for utilities. Its portfolio overlaps with Zenner in AMI gas and heat metering, particularly in European and emerging-market utility tenders.
• Zenner International GmbH & Co. KG: Zenner is a German-headquartered global manufacturer of water, heat, and gas smart meters under its own brand plus IoT communication modules under the B.One sub-brand. It is the subject company itself, included here as the natural anchor against which all the other peers are benchmarked.
• Maddalena: Maddalena is an Italian manufacturer of water meters and metering solutions for utilities. It is comparable to Zenner's water meter portfolio and competes in similar municipal water distribution tenders across southern Europe and emerging markets.
• Itron: Itron is a global leader in smart metering (electric, water, gas) and AMI/MDM platforms. Its water and gas metering business is highly comparable to Zenner's offerings, and it competes for the same municipal and utility AMI deployments worldwide.

Broad incumbents

• Elster Group (Honeywell): Elster, part of Honeywell, is a broad incumbent in gas metering and AMI solutions for utilities. Its gas meter portfolio directly overlaps with Zenner's Atmos line, particularly in European residential/commercial gas distribution.

Regional players

• Apator Metering Group: Apator is a Polish-based metering and measurement company specializing in smart water, heat, and gas meters. It is comparable to Zenner on residential and commercial metering, though primarily serving Central and Eastern European utilities.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

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Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Zenner