Digital water meter BBUWM-R

ultrasonicresidentialsmart

Product Overview
BBUWM-R is an ultrasonic water meter for residential, commercial, and utility metering. It uses the transit-time difference between upstream and downstream ultrasonic signals to measure, display, store, and remotely transmit water-consumption data. With no mechanical measuring element, the meter supports NB-IoT/CAT.1, RS485, and M-BUS communication.
Key Features

• Five sizes from DN15 to DN40
• Bidirectional ultrasonic measurement
• Selectable R125 to R500 measuring range
• Horizontal or vertical installation
• IP68 protection
• 8-digit LCD
• Up to 750 days of local records
• Optional leakage, burst-pipe, scaling, and abnormal-use alarms

Technical Specifications
Parameter — Specification
Nominal size — DN15, DN20, DN25, DN32, DN40
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
DN32 — 10 m³/h — 1.25 × Q3 — 1.6 × Q1 — Q3/R — 125, 160, 200, 250, 315, 400, 500
DN40 — 16 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 — L — W — H — Weight — Meter-Body Thread — Union Thread
DN15 — 165 mm — 103 mm — 155 mm — 1 kg — G3/4B — R1/2
DN20 — 195 mm — 103 mm — 164 mm — 1.2 kg — G1B — R3/4
DN25 — 225 mm — 103 mm — 171 mm — 1.5 kg — G1 1/4B — R1
DN32 — 230 mm — 103 mm — 180 mm — 1.8 kg — G1 1/2B — R1 1/4
DN40 — 300 mm — 103 mm — 189 mm — 2.1 kg — G2B — R1 1/2

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-R
• Nominal sizes: DN15, DN20, DN25, DN32, DN40
• Measurement principle: Transit-time difference (ultrasonic)
• Bidirectional measurement supported
• Measuring range: selectable R125–R500
• Permanent flow (Q3) per size: DN15 2.5 m³/h, DN20 4 m³/h, DN25 6.3 m³/h, DN32 10 m³/h, DN40 16 m³/h
• 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 in flow configs)
• 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 interfaces: NB-IoT/CAT.1, RS485, M-BUS
• Local record storage: up to 750 days
• Optional alarms: leakage, burst-pipe, scaling, abnormal-use