Digital water meter BBUWM-V

ultrasonicwith leakage control

Product Overview
BBUWM-V is a valve-controlled ultrasonic water meter that uses the transit-time principle to calculate flow from the propagation-time difference between upstream and downstream ultrasonic signals. It measures, displays, and stores water consumption and includes an integrated motorized valve for remote shutoff and reopening. NB-IoT/CAT.1, RS485, and M-BUS communication options support integration with remote reading and water-management systems. DN15, DN20, and DN25 versions are available.

Key Features

• Transit-time ultrasonic measurement with no mechanical impeller
• Integrated motorized valve for remote control
• NB-IoT/CAT.1, RS485, and M-BUS communication
• Selectable R125 to R500 measuring range
• Forward and reverse flow measurement
• IP68 protection
• Up to 750 days of local water-consumption records
• Optional leakage, burst-pipe, scaling, and abnormal-use alarms

Technical Specifications
Parameter — Specification
Nominal size — DN15, DN20, DN25
Accumulated-volume resolution — 0.000001 m³
Current-flow resolution — 0.000001 m³/h
Static operating current — ≤30 µA
Battery life — >6 years
Display — 8-digit LCD
Temperature class — T30; T30/T50 listed in the flow configurations
Pressure class — MAP16
Pressure-loss class — Δp25, Δp40
Protection rating — IP68
Accuracy class — Class 2
Electromagnetic environment — E2
Environmental severity class — Class 0
Installation — Horizontal or vertical
Flow-profile sensitivity — U5/D3 or U0/D0
Reverse flow — Supported
Communication — NB-IoT/CAT.1, RS485, M-BUS

Flow Configurations
Size — Permanent Flow Q3 — Overload Flow Q4 — Transitional Flow Q2 — Minimum Flow Q1 — Available R Values
DN15 — 2.5 m³/h — 1.25 × Q3 — 1.6 × Q1 — Q3/R — 125, 160, 200, 250, 315, 400, 500
DN20 — 4 m³/h — 1.25 × Q3 — 1.6 × Q1 — Q3/R — 125, 160, 200, 250, 315, 400, 500
DN25 — 6.3 m³/h — 1.25 × Q3 — 1.6 × Q1 — Q3/R — 125, 160, 200, 250, 315, 400, 500

Maximum Permissible Error

• Q1 to below Q2: ±5%
• Q2 to Q4: ±2% at water temperatures up to 30 °C and ±3% above 30 °C

Dimensions and Connections
Size — Length L — Width W — Height H — Weight — Meter-Body Thread — Union Thread
DN15 — 165 mm — 103 mm — 148 mm — 1 kg — G3/4B — R1/2
DN20 — 195 mm — 103 mm — 154 mm — 1.2 kg — G1B — R3/4
DN25 — 225 mm — 103 mm — 160 mm — 1.5 kg — G1 1/4B — R1

Applicable Standards

• GB/T 778.1-3-2017
• JJG 162-2019
• CJ/T 434-2013
• EN 13757-4 Wireless M-Bus

Caractéristiques / spécifications techniques

• Model: BBUWM-V
• Measurement principle: Transit-time ultrasonic (no mechanical impeller)
• Nominal sizes: DN15, DN20, DN25
• Measuring range (R values): 125, 160, 200, 250, 315, 400, 500
• Permanent flow (Q3): DN15 2.5 m³/h; DN20 4 m³/h; DN25 6.3 m³/h
• Accumulated-volume resolution: 0.000001 m³
• Current-flow resolution: 0.000001 m³/h
• Accuracy class: Class 2
• Display: 8-digit LCD
• Battery life: >6 years
• Protection: IP68
• Pressure class: MAP16
• Pressure-loss class: Δp25, Δp40
• Temperature class: T30 (T30/T50 in flow configs)
• Installation: Horizontal or vertical
• Flow-profile sensitivity: U5/D3 or U0/D0
• Reverse flow: Supported
• Communications: NB-IoT/CAT.1, RS485, M-BUS
• Local log: Up to 750 days of water-consumption records
• Optional alarms: leakage, burst-pipe, scaling, abnormal use
• Applicable standards: GB/T 778.1-3-2017; JJG 162-2019; CJ/T 434-2013; EN 13757-4 Wireless M-Bus