RBBW DN15-1000 Ultrasonic Water Meter is an innovative flow meter with static flow sensor based on the ultrasonic measuring principle.
RBBW Battery powered Ultrasonic Water Meter utilizes ultrasonic measuring methodology and microprocessor technology. All calculation and flow measuring circuits are designed on one single board, thus offering exceptional accuracy and reliability.
The future of smart utility metering. The RBBW Series is a high-performance, battery-powered ultrasonic water meter designed for municipal, industrial, and agricultural water management. With a remarkable range ratio up to R=400, it captures even the smallest leaks. Engineered for durability, it features an IP68-rated enclosure and supports a full suite of wireless protocols including NB-IoT, LoRa, and GPRS, enabling seamless integration into remote AMR/AMI systems without the need for external power.
Size Range: DN15 - DN40 (Copper), DN50 - DN1000 (Cast Iron/Stainless Steel).
Accuracy Class: Class 2 ($R=250$ or $R=400$ options).
Communication: NB-IoT, LoRa, GPRS, RS485 (Modbus), M-Bus.
Pressure Module: Optional built-in or external pressure transmitter.
Battery Life: $\geq 10$ years (Built-in high-capacity lithium battery).
Protection: IP68 (Fully submersible).
Superior Sensitivity: High range ratio ($R=400$) ensures accurate measurement of ultra-low starting flow rates.
Wireless Intelligence: Plug-and-play remote data transmission for smart city and "Internet of Water" applications.
Zero Maintenance: No moving parts to wear out or jam, ensuring long-term stable accuracy and zero pressure loss.
Multi-Channel Design: Available in single, dual, or 4-channel configurations for maximum reliability in large pipe diameters.
RBBW Series Inline transit time water flow meter utilizes two transducers that function as both ultrasonic transmitters and receivers. The transducers are clamped on the outside of a closed pipe at a specific distance from each other. The transducers can be mounted in V-method in which case the ultra sound transverses the pipe twice, or W-method in which case the ultra sound transverses the pipe four times, or in Z-method in which case the transducers are mounted on opposite sides of the pipe and the ultra sound transverses the pipe only once. The selection of mounting method depends on pipe and liquid characteristics. When the flow meter works, the two transducers transmits and receives ultrasonic signals amplified by multi beam which travels firstly downstream and then upstream (Figure 1). Because ultra sound travels faster downstream than upstream, there will be a difference of time of flight(△ｔ). When the flow is still, the time difference(△ｔ) is zero. Therefore, as long as we know the time of flight both downstream and upstream, we can work out the time difference, and then the flow velocity (V) and flow volume (Q) via the following formula.
V= K*D* △ｔ
V: Liquid velocity
K: Constant
D: Distance between the two transducers
△ｔ: Difference in time of flight
Residential Ultrasonic Water Meter Features:
Residential Battery powered Ultrasonic Water Meter(DN15 to DN40)
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RBBW District Ultrasonic Bulk Water Meters (DN50-1000) Specification:
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