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Digital Water Flow Meters with Smart LCD and Electronic Utility Valves
Quick Answer: Silver Instruments supplies digital water flow meters that combine a high-clarity smart LCD, integrated electronic valve, and precise flow sensing in one compact body. You get accurate totalised volume, instant flow rate, and remote open/close control through a single device. They are built for residential submetering, small irrigation networks, and commercial water management where you need measurement and shut-off without extra wiring.
How the Smart LCD and Valve Package Works
The meter body uses a multi-jet or turbine measuring element, sized from DN15 to DN25. Flow spins an impeller, and a non-contact magnetic sensor sends pulses to the onboard microcontroller. A smart LCD rotates between total volume in litres, instantaneous flow rate in L/min, and alarm codes. The electronic valve sits directly downstream of the measuring chamber. When you send a close command via pulse input or RS485 Modbus, a DC motor drives the ball valve shut within 5 seconds. In practice, most engineers pair this with a building management system or a simple data concentrator. We have seen this on customer sites many times, a single twisted pair carries both power and Modbus RTU to 64 meters on one loop.
Where These Meters Are Used
Last year a property developer in the Philippines ordered 320 units of the DN15 version for a new condominium tower in Manila. They needed cold potable water billing per apartment, plus the ability to remotely shut off water if a tenant vacates. The LCD display shows the tenant their consumption without logging into an app, and the facility manager reads all meters over RS485. Another project in Ghana placed DN20 meters with internal lithium battery in a gated community. No mains power was available at the meter pit. Each meter stores 18 months of hourly data, and the valve can be cycled manually by pressing a button on the LCD bezel. Because the valve uses a maintenance-free ceramic ball design, it resists scaling in hard water with 380 ppm CaCO₃.
Key Specifications That Matter
Nominal diameters: DN15, DN20, DN25. Pressure rating: PN16. Temperature range: 0.1 °C to 50 °C for cold potable water. Accuracy: ±2 % of reading in the lower flow zone, ±1 % above the transition flowrate. The smart LCD is a reflective monochrome screen, readable under full sunlight in the Middle East and backlit when you press the front button. Output options: isolated pulse output (NPN open collector), RS485 Modbus RTU, and optional pulse input for valve control. Power supply: 3.6 V D-cell lithium battery lasting 8 to 10 years
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Why Silver Instruments for Your Utility Water Meter Supply
You deal with an ISO 9001 manufacturer that stocks DN15 and DN20 meters in Sydney and Singapore for fast shipment to Southeast Asia and Oceania. We test every meter with a reference meter bank calibrated to ISO 4064 before dispatch. Our team in Nanjing speaks English and Spanish and will review your project BOM before you order. So you avoid mismatched threads or wrong output types. If you need a full kit with a data logger and cloud software, we can pre-configure everything. Just send us your water temperature, pipe size (DN), typical flow range, and communication preference. Unlike generic online listings, we give you a single point of contact who understands pressure drop curves and Modbus register maps. Call +86-135-1213-1526, email [email protected], or message via WhatsApp at 86-135-12131526. WeChat is +86 13512131526 if that suits you better.
Frequently Asked Questions
Can this digital water meter handle potable water?
Yes, all wetted parts comply with NSF/ANSI 61 and ACS for drinking water. We use food-grade POM and EPDM seals.
What communication protocol is standard for remote reading?
Most buyers choose RS485 Modbus RTU. LoRaWAN, M-Bus, and NB-IoT are available as factory-fitted options on request.
Does the electronic valve fail open or closed?
You specify when ordering. The standard NC (normally closed) version cuts flow on power loss. An NO (normally open) version is made for irrigation where continuous flow is critical.
What is the typical battery life with the LCD active?
With daily LCD wake-up and 15-minute data logging, the 3.6 V lithium battery lasts 8 to 10 years. The battery is field-replaceable under the sealed front cover.
Can you supply larger sizes like DN40 or DN50?
We can but the integrated valve becomes uneconomical above DN25. For larger lines, we recommend a separate electromagnetic flow meter paired with an actuated ball valve. Ask our engineers for a cost comparison.
Send us your pipe size (DN), water quality, pressure, and required flow range to [email protected]. We will return a commercial offer and dimensional drawing within one working day.
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