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.