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Water Meters
Derwent Industries offers a wide range of water meters suitable for clean hot and cold water use. We are the national distributor for several trusted international brands, including our own AVFI series.
AVFI ALFA Series
The ALFA series is a competitively priced, single-jet dry vane wheel water meter with a magnetic drive.
Available in 15 mm and 20 mm sizes
MI BSP threaded connections
AVFI BETA Series
The BETA series is a heavy-duty, multi-jet dry vane wheel meter, also with magnetic drive.
Available in sizes from 15 mm to 50 mm
MI BSP threaded connections
AVFI OMEGA Series (Flanged)
The OMEGA series is designed for more demanding applications and includes a reed switch for pulse output.
Complies with Australian standards
Epoxy-coated for long-lasting corrosion protection
Available in sizes from DN 15 (15 mm) to DN 300 (300 mm)
For technical specifications and installation details, please refer to the relevant data sheets for each model.
FAQ
What types of water meters does Derwent Industries offer?
Derwent Industries distributes a comprehensive selection of single-jet, multi-jet, and flanged water meters for clean hot and cold water applications across commercial, civil, and irrigation sectors:
- ALFA Series: Competitively priced single-jet dry vane wheel meters with magnetic drives, available in compact 15 mm and 20 mm sizes with MI BSP threaded connections.
- BETA & BETA-SDC Series: Heavy-duty, multi-jet dry vane wheel meters with magnetic drives, frost-resistant dry dials, and internal strainers, spanning sizes from 15 mm to 50 mm (DN15–DN50).
- OMEGA Series (Flanged): Heavy-duty flanged water meters designed for large mains, bulk water transfer, and demanding industrial flow monitoring, available from DN15 up to DN500 for cold water and DN50 to DN200 for hot water.
What telemetry and pulse output options are available for smart metering?
Derwent Industries meters support pulse output integration for connection to remote reading systems and SCADA networks:
- OMEGA Series: Equipped as standard with a reed switch for pulse output. Pulse ratios vary by size:
– DN40–DN125: 1 Pulse per 1,000 Litres
– DN150–DN200: 1 Pulse per 10,000 Litres
– DN250–DN500: 1 Pulse per 100,000 Litres - BETA-SDC Series: Features reed switch output capability (when powered) and options for a resettable remote LCD display:
– DN15–DN40: 1 Pulse per 1 Litre
– DN50: 1 Pulse per 10 Litres
What design features ensure long service life and accuracy?
Derwent Industries water meters incorporate multiple features to ensure durability and ISO compliance:
- Dry Register Isolation: Magnetic transmission keeps the hermetically vacuum-sealed register completely dry and prevents fogging, ensuring only the impeller and shaft touch the water.
- External Protection: Fusion Bonded Epoxy (FBE) coating guards against corrosion, while built-in magnetic shields prevent tampering from external magnetic fields.
- International & Local Standards: Complies with Australian standards and meets or exceeds ISO 4064 Class B performance ratings with low pressure loss even at high flow rates.
- Temperature Ratings: Standard cold water models, along with dedicated high-temperature variants rated for hot water applications up to 90°C.
Water Meter Series Comparison
| Feature / Series | ALFA Series | BETA / BETA-SDC Series | OMEGA Series (Flanged) |
|---|---|---|---|
| Meter Technology | Single-jet dry vane wheel | Multi-jet impeller dry dial | Flanged bulk meter with removable measuring element |
| Size Range | 15 mm & 20 mm | 15 mm to 50 mm (DN15–DN50) | DN15 to DN500 (Cold) / DN50 to DN200 (Hot) |
| Connection Style | MI BSP Threads | MI BSP Threads | Standard Flanged Connections |
| Hot Water Rating | Clean Cold Water | Optional Hot Water model (≤90∘C) | Optional Hot Water model (≤90∘C) |
| Body & Protection | Compact Alloy/Brass | FBE Coated, Magnetic Shield, Internal Strainer | High-grade Fusion Bonded Epoxy Coated Body |