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Helvatron DELTA III M-Bus | G1

Ultrasonic Heat Meter DELTA III DN20, 130 mm, qp 2.5 m³/h, M-Bus, MID The DELTA III DN20 from Helvatron AG is designed for accurate heat metering in heating systems where a slightly higher flow capacity than DN15 is required. With 130 mm installation length and a nominal flow rate qp of 2.5 m³/h, this version is well suited for residential and light commercial applications. Its integrated M-Bus readout interface enables efficient integration into remote metering and energy management environments. For centralized meter data acquisition and structured system monitoring, the DELTA III DN20 can be linked to the M-Center data logger. Why choose the DELTA III DN20 Designed for stable heat metering The ultrasonic flow sensor supports precise and repeatable measurement over long operating periods. This measuring principle is ideal for applications where long-term stability and low-maintenance operation matter. Approved for billing applications Because the DELTA III DN20 is MID compliant, it can be used for billing-related heat consumption measurement. The required MID verification fee is already included. Easy integration into M-Bus systems The built-in M-Bus communication interface makes this meter suitable for centralized reading concepts, building automation and submetering projects. In combination with the M-Center, consumption data can be collected and processed efficiently. Practical advantages during installation The DELTA III DN20 supports horizontal and vertical installation, giving installers more freedom in retrofit and new-build projects. The calculator is rotatable and removable, and a wall mounting adapter is supplied as standard. Technical data DELTA III DN20 Manufacturer: Helvatron AG Model series: DELTA III Nominal size: DN20 Installation length: 130 mm Nominal flow qp: 2.5 m³/h Measurement principle: Ultrasonic Communication: M-Bus Factory cable length: 1.5 m Baud rate: 2400 (default) M-Bus secondary address: Serial number M-Bus primary address: 000 Temperature sensor connection: Pt500 Temperature sensor set: short direct immersion temperature sensors, 27.5 mm Temperature sensor cable length: approx. 1.5 m Power supply: Battery 19500 mAh Battery operated: Yes Operating pressure: 16 / 25 bar Material: Brass MID compliant: Yes Installation position: horizontal and vertical Data storage: all monthly values over the full service life Main product features Ultrasonic flow measurement MID approved for billing M-Bus interface for remote reading Horizontal and vertical installation possible Very low installation height Rotatable and removable calculator Wall mounting adapter included Long-term storage of monthly values Application areas Residential units and apartment buildings Heating systems with medium flow demand Consumption-based billing projects M-Bus remote reading systems Energy monitoring and building services Connection to the M-Center FAQ for DELTA III DN20 Is the DELTA III DN20 suitable for billing purposes? Yes, the unit is MID compliant and suitable for billing applications. Which interface is available? The heat meter includes an integrated M-Bus interface. Can the meter be installed horizontally and vertically? Yes, both installation positions are supported. What type of temperature sensors are used? It uses a Pt500 temperature sensor set with short direct immersion sensors. Can the DELTA III DN20 be connected to centralized readout? Yes, with its M-Bus interface it can be connected to remote reading systems and to the M-Center for central data acquisition.

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DELTA III M-Bus DN15 110 mm, qp 1.5 m3/h

Ultrasonic Heat Meter DELTA III DN15, 110 mm, qp 1.5 m³/h, M-Bus, MID The DELTA III DN15 ultrasonic heat meter from Helvatron AG is a compact and accurate solution for reliable heat energy measurement in apartments, residential buildings and heating systems. With MID approval for billing purposes, this model is suitable for legally compliant consumption-based heat metering. The meter features an integrated M-Bus communication interface, allowing simple integration into remote reading systems and building energy monitoring applications. For central data collection and efficient meter readout, the DELTA III DN15 can be combined with the M-Center data logger. Key benefits of the DELTA III DN15 Accurate ultrasonic measurement technology The built-in ultrasonic flow sensor provides precise and stable measurement over the long term. Compared with conventional mechanical measuring principles, ultrasonic technology offers low wear and dependable performance. MID approved for billing The DELTA III DN15 is MID compliant and approved for billing-related applications. The MID verification fee is already included. Flexible installation options This heat meter supports both horizontal and vertical installation. The calculator is rotatable and removable, making installation and reading easier. A wall mounting adapter is included. Ready for M-Bus remote reading Thanks to its integrated M-Bus interface, the DELTA III DN15 is ideal for modern building automation, centralized consumption recording and remote meter reading. For professional monitoring setups, it can be linked to the M-Center. Technical data DELTA III DN15 Manufacturer: Helvatron AG Model: DELTA III Connection size: DN15 Installation length: 110 mm Nominal flow qp: 1.5 m³/h Flow sensor: Ultrasonic Thread: ¾B Pipe connection: ½ Communication: M-Bus Factory cable length: 1.5 m Baud rate: 2400 (default) M-Bus secondary address: Serial number M-Bus primary address: 000 Temperature sensor connection: Pt500 Temperature sensor set: short direct immersion temperature sensors, 27.5 mm Temperature sensor cable length: approx. 1.5 m Power supply: Battery 19500 mAh Battery operated: Yes Operating pressure: 16 / 25 bar Material: Brass MID compliant: Yes Installation position: horizontal and vertical Monthly value storage: throughout the entire service life Product highlights Very low installation height Ultrasonic flow sensor Horizontal and vertical installation possible All monthly values stored over the full lifetime Precise and long-term stable Rotatable and removable calculator Wall mounting adapter included MID verification fee included Typical applications Apartments and multi-family buildings Heating circuits and substations Consumption-based heat billing M-Bus remote reading systems Building automation and energy monitoring Connection to the M-Center FAQ for DELTA III DN15 Is the DELTA III DN15 approved for billing? Yes, the meter is MID compliant and approved for billing purposes. Which communication interface does it use? The DELTA III DN15 is equipped with an M-Bus interface. Can the heat meter be installed vertically? Yes, it is suitable for both horizontal and vertical installation. Which temperature sensors are used? The unit uses a Pt500 temperature sensor set with short direct immersion sensors and approx. 1.5 m cable length. Can I connect the DELTA III DN15 to a remote reading system? Yes, the integrated M-Bus interface allows easy integration into remote reading and monitoring systems. For centralized data collection, the M-Center is a practical option.

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Helvatron DELTA III M-Bus | G 1 1/2

Ultrasonic Heat Meter DELTA III DN32, 260 mm, qp 6 m³/h, M-Bus, MID The DELTA III DN32 ultrasonic heat meter from Helvatron AG is intended for measuring tasks that require a higher nominal flow rate together with reliable long-term accuracy. With DN32, an installation length of 260 mm and qp 6 m³/h, this model is especially suitable for larger heating circuits, technical plant rooms and supply lines with increased throughput. The combination of an ultrasonic flow sensor, Pt500 temperature sensor connection and integrated M-Bus communication makes the DELTA III DN32 a practical choice for professional heat consumption metering. Thanks to its MID approval, the meter can also be used in billing-related applications. For central readout and structured data handling, it can be connected to the M-Center data logger. Why the DELTA III DN32 is a strong option Designed for higher flow demand The DN32 version is a good fit whenever more capacity is needed than smaller meter sizes can provide. With qp 6 m³/h, it is built for applications that require dependable measurement under higher flow conditions. Low-wear ultrasonic measuring principle The integrated ultrasonic flow sensor supports accurate heat metering with low mechanical stress in the measuring section. That is an important advantage in systems focused on long service life, stable readings and reduced maintenance effort. Simple integration into central readout structures Via the integrated M-Bus interface, the DELTA III DN32 can be incorporated into remote reading structures, submetering concepts and building management systems. For central collection and evaluation of meter values, the M-Center is a suitable companion product. Advantages in day-to-day plant operation The DELTA III DN32 is suitable for horizontal and vertical installation. Its calculator is rotatable and removable, which simplifies installation, servicing and later readout. A wall mounting adapter is included. In addition, the heat meter stores all monthly values throughout its service life. This is useful for documentation, analysis and transparent billing processes. Technical data DELTA III DN32 Manufacturer: Helvatron AG Series: DELTA III Nominal size: DN32 Installation length: 260 mm Nominal flow qp: 6 m³/h Measurement principle: Ultrasonic Communication interface: M-Bus Baud rate: 2400 (default) M-Bus secondary address: Serial number M-Bus primary address: 000 Temperature sensor connection: Pt500 Temperature sensor set: short direct immersion temperature sensors, 27.5 mm Temperature sensor cable length: approx. 1.5 m Factory cable length: 1.5 m Power supply: Battery 19500 mAh Operating pressure: 16 / 25 bar Material: Brass MID compliant: Yes Installation position: horizontal and vertical Storage: monthly values over the full service life Main strengths of the DELTA III DN32 Heat meter for higher flow applications Ultrasonic measurement for precise and stable results MID approval for billable heat metering M-Bus interface for remote reading and monitoring Horizontal or vertical installation possible Low installation height Rotatable and removable calculator Wall mounting adapter included Monthly value storage over the full lifetime Suitable for connection to M-Center Where this DN32 version is typically used Larger heating circuits in residential and commercial buildings Technical supply lines and plant rooms Distribution systems with increased flow demand Billing-related heat consumption metering M-Bus infrastructure in retrofit and new-build projects Energy monitoring with M-Center FAQ for DELTA III DN32 When is the DELTA III DN32 the right choice? This version is suitable when a heat meter with DN32 and qp 6 m³/h is required for higher flow rates. Is the meter approved for billing use? Yes, the DELTA III DN32 is MID compliant and can be used in billing-related applications. Which communication interface is available? The meter is equipped with an M-Bus interface for remote readout and central data acquisition. Which installation positions are supported? The DELTA III DN32 can be installed horizontally or vertically. How can I collect the consumption data centrally? For structured readout and further data processing, the meter can be connected via M-Bus to suitable systems such as the M-Center.

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Helvatron DELTA III M-Bus | G2

Ultrasonic Heat Meter DELTA III DN40, 300 mm, qp 10 m³/h, M-Bus, MID The DELTA III DN40 from Helvatron AG is a high-capacity ultrasonic heat meter for installations with increased flow demand and clear requirements for precision, reliability and billing compliance. With DN40, an installation length of 300 mm and a nominal flow qp of 10 m³/h, this version is aimed at larger heating circuits, technical supply units and demanding building services applications. The combination of ultrasonic flow sensing, Pt500 temperature sensor connection and an integrated M-Bus readout interface makes the DELTA III DN40 a solid choice for professional heat metering. Because it carries MID approval for billing purposes, it can also be used in legally relevant consumption-based billing scenarios. For central data acquisition and forwarding of measured values, the meter can be connected to the M-Center data logger. Why the DELTA III DN40 is a good fit for larger systems Made for high flow applications With qp 10 m³/h, this model is intended for installations where significantly higher flow rates occur than in smaller heating loops. The DELTA III DN40 is therefore a suitable option wherever additional performance reserve and dependable measurement are required. Accurate heat metering with ultrasonic technology The ultrasonic measuring principle supports exact flow detection and strong long-term stability. In continuously operating systems, this is a real benefit because it combines precise measurement with low mechanical wear. M-Bus communication for structured readout Through the integrated M-Bus communication interface, the DELTA III DN40 can be integrated into central readout systems, submetering concepts and technical monitoring platforms. For users who want to collect and process consumption data efficiently, pairing the meter with the M-Center is a practical choice. Practical benefits during installation and operation The heat meter is suitable for horizontal and vertical installation, making it easier to integrate into different plant layouts. The calculator is rotatable and removable, which helps with mounting, positioning and later readout. A wall mounting adapter is included as standard. For traceability over time, the DELTA III DN40 stores all monthly values over its full service life. That is especially useful for professional analysis, documentation and billing processes. Technical data DELTA III DN40 Manufacturer: Helvatron AG Series: DELTA III Nominal size: DN40 Installation length: 300 mm Nominal flow qp: 10 m³/h Measurement principle: Ultrasonic Communication interface: M-Bus Baud rate: 2400 (default) M-Bus secondary address: Serial number M-Bus primary address: 000 Temperature sensor connection: Pt500 Temperature sensor set: short direct immersion temperature sensors, 27.5 mm Temperature sensor cable length: approx. 1.5 m Factory cable length: 1.5 m Power supply: Battery 19500 mAh Battery operated: Yes Operating pressure: 16 / 25 bar Material: Brass MID compliant: Yes Installation position: horizontal and vertical Storage: monthly values over the entire service life Product advantages at a glance Ultrasonic heat meter for higher flow ranges MID approval for billable heat metering M-Bus interface for remote reading and monitoring Suitable for horizontal and vertical installation Low installation height despite its performance class Rotatable and removable calculator Wall mounting adapter included Monthly value storage over the full lifetime Precise and long-term stable measuring technology Suitable for connection to M-Center Typical applications for the DELTA III DN40 Larger heating and supply circuits Commercial and technical building installations Central plant rooms and distribution systems with higher flow rates Billing-compliant heat consumption metering according to MID M-Bus infrastructure in professional readout systems Energy monitoring with M-Center FAQ for DELTA III DN40 What applications is the DELTA III DN40 suitable for? The DELTA III DN40 is ideal for applications with higher flow rates where a heat meter with qp 10 m³/h and DN40 is required. Is this version approved for heat billing? Yes, the heat meter is MID compliant and suitable for billing-related applications. How are the data read out? The DELTA III DN40 includes an integrated M-Bus interface for connection to central readout and monitoring systems. Is only horizontal installation possible? No, the heat meter is suitable for both horizontal and vertical installation. Which solution is suitable for central data collection? For structured readout and further processing of measured values, using the M-Center is a practical option.

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Helvatron DELTA III M-Bus | G 1 1/4

Ultrasonic Heat Meter DELTA III DN25, 260 mm, qp 3.5 m³/h, M-Bus, MID The DELTA III DN25 from Helvatron AG is a modern ultrasonic heat meter for heating and supply systems that require higher flow capacity than smaller nominal sizes. With DN25, 260 mm installation length and qp 3.5 m³/h, this variant is a strong choice for stable and accurate heat measurement in larger residential and technical environments. Its integrated M-Bus interface makes it suitable for centralized meter reading and energy monitoring concepts. For structured remote data acquisition, the meter can be connected to the M-Center data logger. What makes the DELTA III DN25 stand out Built for dependable long-term operation The ultrasonic flow sensor provides precise measurement without relying on a conventional mechanical counting mechanism in the flow section. That supports low wear, strong long-term stability and reliable performance in everyday system operation. MID compliant for billable heat metering This version is MID approved, making it suitable for consumption-based billing applications. The verification fee is already included, which simplifies specification and purchasing. Well suited for M-Bus infrastructure The integrated M-Bus communication interface allows smooth integration into remote reading systems, building automation setups and submetering projects. Paired with the M-Center, the DELTA III DN25 becomes part of a practical and scalable monitoring solution. Flexible installation and serviceability The DELTA III DN25 heat meter supports both horizontal and vertical installation. Its calculator is rotatable and removable, which makes positioning, servicing and reading easier. A wall mounting adapter is included in the scope of supply. Technical data DELTA III DN25 Manufacturer: Helvatron AG Series: DELTA III Nominal size: DN25 Installation length: 260 mm Nominal flow qp: 3.5 m³/h Measurement principle: Ultrasonic Communication: M-Bus Baud rate: 2400 (default) M-Bus secondary address: Serial number M-Bus primary address: 000 Temperature sensor connection: Pt500 Temperature sensor set: short direct immersion temperature sensors, 27.5 mm Temperature sensor cable length: approx. 1.5 m Factory cable length: 1.5 m Power supply: Battery 19500 mAh Operating pressure: 16 / 25 bar Material: Brass MID compliant: Yes Installation position: horizontal and vertical Data storage: monthly values over the full service life Product advantages at a glance Ultrasonic technology for precise heat metering Suitable for billing-related applications M-Bus interface for remote readout Horizontal and vertical installation possible Low installation height Rotatable and removable calculator Wall mounting adapter included Long-term storage of monthly values MID verification fee included Typical applications for DELTA III DN25 Apartment blocks and residential complexes Technical heating distribution systems Commercial units Substations and supply circuits M-Bus based remote metering projects Energy monitoring with M-Center FAQ for DELTA III DN25 What kind of applications is the DELTA III DN25 suitable for? It is well suited for heating and supply systems with qp 3.5 m³/h where precise and billable heat measurement is required. Is the heat meter MID compliant? Yes, this version is MID compliant and can be used for billing purposes. Which communication interface is available? The unit includes an integrated M-Bus interface for readout and monitoring. Can the calculator be positioned separately? The calculator is rotatable and removable, and a wall mounting adapter is included. How can the meter data be collected centrally? The DELTA III DN25 can be connected via M-Bus to remote reading systems and to the M-Center for centralized data collection.

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DELTA III Ultrasonic Heat Meters for Accurate Billing and Professional Energy Monitoring

The DELTA III ultrasonic heat meters from Helvatron AG are designed for precise, long-term stable and billing-compliant heat energy measurement in modern heating systems, residential buildings, commercial properties and technical installations. With MID approval for billing purposes, an integrated M-Bus interface and reliable ultrasonic measurement technology, the DELTA III product range is a strong solution for projects where accurate heat consumption data and dependable system integration matter.

The DELTA III series is available in multiple sizes, including DN15, DN20, DN25, DN32 and DN40, making it suitable for a wide range of applications from compact residential circuits to larger heating loops and technical distribution systems. Whether you need a heat meter for apartments, multi-family buildings, substations or commercial heating infrastructure, DELTA III offers a practical combination of precision, durability and easy system integration.

Why ultrasonic heat meters are a smart choice

Compared with conventional mechanical measuring principles, ultrasonic heat meters offer major advantages in many heating applications. The ultrasonic flow sensor supports precise measurement with low wear, helping maintain stable performance over long operating periods. This makes ultrasonic heat meters especially attractive for professional metering concepts, submetering projects and modern building technology where long-term reliability and accurate data collection are essential.

Another major benefit is the easy integration into centralized readout and monitoring systems. The DELTA III heat meters are equipped with M-Bus communication, which allows efficient data transmission and simplified integration into technical infrastructures. For centralized data collection, structured meter readout and transparent monitoring of consumption values, the meters can be combined with the M-Center data logger.

Reliable heat metering for billing, monitoring and building technology

DELTA III heat meters are built for real-world installation and long-term use. They support horizontal and vertical installation, feature a rotatable and removable calculator and store monthly values over the full service life. These characteristics make them suitable not only for consumption-based billing, but also for technical monitoring, system documentation and transparent energy management strategies.

For projects that require more than heat metering alone, your energy data infrastructure can be expanded with additional products from our portfolio. Depending on the communication standard and system design, you can combine your heat meters with 3-phase power meters with M-Bus, 3-phase power meters with TCP/IP, 3-phase power meters with LoRa or 3-phase power meters with RS485. For higher-level analysis, visualization and optimization of consumption data, our energy management software is the ideal complement.

Find the right DELTA III heat meter for your application

Choosing the right heat meter depends on the required nominal size, installation length and flow range of your heating system. The DELTA III range covers different application profiles, from compact metering points to systems with increased flow demand. This makes the series suitable for installers, planners, system integrators, property managers and technical operators looking for a robust and billing-ready ultrasonic heat meter with M-Bus connectivity.

If you are looking for an ultrasonic heat meter with MID approval and M-Bus interface, the DELTA III series offers a reliable and scalable solution for modern heat metering and energy data acquisition.

FAQ about our DELTA III ultrasonic heat meters

What is an ultrasonic heat meter?

An ultrasonic heat meter measures thermal energy by combining flow measurement and temperature measurement. The DELTA III series uses an ultrasonic flow sensor together with Pt500 temperature sensor technology to calculate heat consumption accurately.

What are the advantages of an ultrasonic heat meter compared to a mechanical heat meter?

Ultrasonic heat meters are known for high measurement accuracy, low wear and long-term stable performance. Because the measurement principle is based on ultrasonic technology, they are often a strong choice for professional and long-life installations.

Are DELTA III heat meters approved for billing purposes?

Yes. The DELTA III models in this category are MID approved and suitable for billing-related applications where legally compliant heat metering is required.

Which communication interface do the meters use?

The DELTA III ultrasonic heat meters are equipped with an M-Bus interface. This allows integration into remote reading systems, building technology platforms and centralized meter data collection concepts.

Can DELTA III heat meters be connected to a data logger?

Yes. For centralized meter readout and structured energy data acquisition, the meters can be connected to the M-Center data logger.

Which nominal sizes are available in the DELTA III series?

The series includes models in DN15, DN20, DN25, DN32 and DN40, allowing the product range to cover a broad spectrum of heating applications.

Can the heat meters be installed vertically?

Yes. DELTA III heat meters are suitable for both horizontal and vertical installation, which gives greater flexibility in practice.

What kind of temperature sensors are used?

The meters use Pt500 temperature sensors with short direct immersion temperature probes, supporting accurate thermal energy calculation.

Who are these ultrasonic heat meters suitable for?

They are suitable for installers, building operators, planners, property managers, energy service providers and system integrators who need reliable heat billing, remote readout capability and professional energy monitoring.

Which products match DELTA III heat meters for complete energy monitoring?

For broader energy monitoring solutions, DELTA III heat meters can be combined with the M-Center data logger, 3-phase power meters with M-Bus, 3-phase power meters with TCP/IP, 3-phase power meters with LoRa, 3-phase power meters with RS485 and our energy management software.