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Ultrasonic Water Meter, Static Residential Water Meter

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280W-R ultrasonic water meter is the latest innovation from Spire Metering. The 280W-R was formerly called the 280W-D. The meter is the same but was renamed to better serve the residential marketplace. It is specially designed for domestic water metering applications where conventional water meters fail due to harsh environment, solids in water, high maintenance, magnetic vandalization or incapable of leakage detection.

280W-R is a static water meter with no moving parts to wear or tear. It is literally maintenance-free. The sensor is a straight-through type, no blockage exists. This not only leads to very small pressure drop, but also allows the meter to work with both pure water and water with some solids.

280W-R has adapted a robust design. Its sensor body is made from brass, not plastic. The whole meter is rated for IP68 water-proof. Special packing technique protects the LCD from water condensation. This unique product can work reliably in challenging environment such us Middle East.  

With its maximum 95 °C operating temperature and nominal pressure of 1.6MPa, the technical specifications meet the standard for residential meters for both cold water and hot water. The high measurement dynamic, better than Class D, allows a load of up to double the rating, thereby ensuring high operating security. In addition, the high sensitivity to low flow allows leakage detection and the capability to count each drop.

Unlike mechanic water meter, 280W-R water meter has outstanding long-term stability. The performance of its sensor does not degrade over time, thus, its overall system accuracy does not degrade over time. This compact meter fits in even the smallest installation conditions and can be mounted separately from the electronics console. The meter also has an order option for remote read-out (Pulse, M-bus, encoder or RS485 output). The large display can be set to display flow velocity, flow total, working time, etc.

280W-R ultrasonic water meter represents the trend of modem water metering industry. Both commercial and residential installations can profit from the advantages of wear-free water measurement: precision, operating security and long service life.

Spire metering also provides turnkey solution for water and energy submetering in apartment buildings where a submetering system could save the landlord up to 15% utility cost.

Operating Principle:

A typical ultrasonic water meter consists of a sensor and an electronic console. The sensor has two ultrasonic transducers (A and B) built into its body. Each transducer functions as both ultrasonic transmitter and receiver. The electronic console operates the two transducers by alternately transmitting and receiving a burst of sound energy and measuring the transit time that it takes for sound to travel between the two transducers. The difference in the transit time measured is directly and exactly related to the velocity of the water in the pipe. The flowrate is calculated from the measured velocity and the pipe inner diameter.

Features and Benefits

• For domestic water consumption metering
• Cold water as well as water up to 60°C
• No moving parts. Wear-free ultrasonic technology
• Flow sensor made from brass
• Patented sensor design
• Robust, not impacted by water impurity. Meets the challenges of harsh environment, such as the Middle East and Africa
• Excellent long-term stability. Accuracy does not degrade over time
• No maintenance needed
• Bi-directional flow
• No count on air
• Leakage detection
• Not affected by magnetic interference

• Low pressure drop
• Free positioning for mounting
• Battery for 10 more years
• IP 68 water-proof
• Humidity resistance. No water condensation risk on the display
• Tamper-proof design
• NIST calibration to OIML R49 Class 2 / Metrology ISO 4064 Class D
• Smart and AMR ready with pulse, M-Bus, encoder or Wireless interface
• Optional SpireCapture AMR/AMI and Billing solutions


• Revenue metering
• Residential submetering
• Commercial buildings
• Leakage detection
• AMR and billing


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