1" BSP (DN25) Diehl Altair Cold Water Meter

The Diehl Metering ALTAIR V4 DN25 is a compact, high-performance volumetric cold water meter designed for accurate measurement of residential and commercial water consumption. Developed in accordance with the Measuring Instruments Directive (MID) and European standards, the ALTAIR V4 combines excellent measuring performance with a robust brass-bodied design.

This 1" BSP (DN25) model has a nominal flow rate of Q3 6.3 m³/hr, an overall meter length of 260mm and a maximum water temperature of 50°C. The meter body connection is 1.1/4" BSP and the matching union connection is 1" BSP.

For remote meter reading and smart metering applications, the ALTAIR V4 is compatible with the Diehl Metering IZAR system. An IZAR clip-on communication module can be fitted when required, allowing the meter to be upgraded for radio or wired remote reading without replacing the complete meter.

Key Features

• Size: 1" BSP (DN25)
• Diehl Part Number: 3095709
• Nominal Flow Rate: Q3 6.3 m³/hr
• Meter Length: 260mm
• Maximum Temperature: 50°C
• Meter Body Connection: 1.1/4" BSP
• Union Connection: 1" BSP
• Volumetric measuring principle for accurate water measurement
• Compact and robust brass-bodied construction
• Compatible with Diehl IZAR clip-on communication modules
• Suitable for mobile or fixed-network remote meter reading

Remote Reading & Communication

The modular design of the ALTAIR V4 allows communication functionality to be added when required. Compatible IZAR clip-on modules provide a straightforward upgrade path for applications requiring automated or remote meter reading.

Why Choose the ALTAIR V4?

The ALTAIR V4 combines the accuracy of volumetric metering with a compact, robust design and upgradeable communication capability. This makes it well suited to residential and commercial water metering, property management, sub-metering and smart metering projects.

Downloads

ALTAIR V4 Product Data Sheet
ALTAIR V4 Installation Guide
EU Declaration of Conformity