Ultrasonic transit-time flow meter BBUFM-S

volumefor waterfor chemicals

Product Overview
BBUFM-S is a clamp-on transit-time ultrasonic liquid flow meter engineered for small pipe diameters and easy integration into equipment. The sensors mount externally with a size-matched bracket: no pipe cutting, drilling or process contact is required. Configurations include compact, remote and remote high-temperature variants suitable for industrial online monitoring of water, purified and ultrapure water, beverages and other clean process liquids in cleaning, production and HVAC systems.

Key Features

• Non-invasive clamp-on installation without pipe modification
• Size-matched mounting bracket for accurate sensor positioning
• Compact, remote and remote high-temperature transmitter options
• Suitable for metal and common plastic pipe materials
• OLED display for instantaneous and accumulated flow values
• 4–20 mA, RS485/Modbus communication and optional OCT alarm output
• No moving parts, negligible pressure drop and low maintenance

Typical Applications

• Industrial and flat-glass cleaning systems
• Beverage, food and pharmaceutical production lines
• Purified-water and ultrapure-water distribution systems
• HVAC units, cooling water and chiller circuits
• Chemical and process-liquid transfer monitoring
• Small-pipe flow measurement and OEM equipment integration

Suitable Liquids
Designed for clean liquids with stable acoustic properties and minimal entrained gas or cavitation. Typical media include:

• Tap water, purified water and ultrapure water
• Beverages and alcohol-based liquids
• Acidic, alkaline and saline solutions
• Cleaning fluids and selected chemical solvents
• Other process liquids compatible with ultrasonic transmission

Technical Specifications
Measurement principle: Ultrasonic transit time
Velocity range: 0.1 to 5.0 m/s
Accuracy: ±2.0%
Repeatability: 0.8%
Pipe outside-diameter range: ~9.53 to 220 mm
Analog output: 4–20 mA, 600 Ω max load
Alarm output: Optional OCT upper- and lower-limit alarm
Communication: RS485, Modbus protocol
Power supply: 24 VDC
Standard cable length: 2.0 m
Display: 128 × 64 OLED
Totalizer: Six digits
Data storage: Daily, monthly, annual and accumulated flow records
Ambient temperature (compact): 0 to 50 °C
Humidity: 0–95% RH, non-condensing
Protection rating: IP54
Enclosure material: Aluminum alloy

Configuration Options
Compact: Transmitter and transducer integrated in one assembly; for pipe ODs ~9.53 to 110 mm
Remote: Separate display/transmitter and transducer; covers pipe ODs ~9.53 to 220 mm
Remote high-temperature: Separate transmitter and transducer with extended medium temperature up to 0 to 110 °C

Temperature Ranges
Compact: 0 to 50 °C
Standard remote: 0 to 80 °C
Remote high-temperature: 0 to 110 °C

Pipe Configurations
9.53 mm — DN6
12.7 mm — DN8
15 mm — DN10
20 mm — DN15
25 mm — DN20
32 mm — DN25
40 mm — DN32
50 mm — DN40
63 mm — DN50
75 mm — DN65
90 mm — DN80
110 mm — DN100
140 mm — DN125
160 mm — DN150
220 mm — DN200

Reference Flow Ranges
9.53 mm: 0.02 m³/h — 0.66 m³/h
12.7 mm: 0.04 m³/h — 1.18 m³/h
15 mm: 0.06 m³/h — 1.84 m³/h
20 mm: 0.06 m³/h — 3.18 m³/h
25 mm: 0.11 m³/h — 5.65 m³/h
32 mm: 0.18 m³/h — 8.83 m³/h
40 mm: 0.29 m³/h — 14.47 m³/h
50 mm: 0.45 m³/h — 22.61 m³/h
63 mm: 0.71 m³/h — 35.33 m³/h
75 mm: 1.19 m³/h — 59.70 m³/h
90 mm: 1.81 m³/h — 90.43 m³/h
110 mm: 2.83 m³/h — 141.30 m³/h
140 mm: 4.42 m³/h — 220.78 m³/h
160 mm: 6.36 m³/h — 317.93 m³/h
220 mm: 11.30 m³/h — 565.20 m³/h

Compatible Pipe Materials

• Stainless steel
• Carbon steel
• Copper
• PVC / CPVC
• PVDF
• PPR / PPH
• PFA / PU
• HDPE

Measurements and Display

• Instantaneous flow
• Net accumulated flow
• Daily, monthly and annual accumulated records
• Metric and imperial units
• Upper- and lower-limit alarms

Selection Information

• Actual pipe outside diameter, internal diameter and wall thickness
• Pipe material
• Liquid type and acoustic properties
• Medium temperature
• Expected flow range
• Choice of compact, remote or remote high-temperature configuration
• Required outputs and communication interfaces

Specifications / Technical data

• Measurement principle: Ultrasonic transit time
• Velocity range: 0.1 to 5.0 m/s
• Accuracy: ±2.0%
• Repeatability: 0.8%
• Pipe OD range: ~9.53 to 220 mm
• Analog output: 4–20 mA (600 Ω max)
• Alarm: Optional OCT upper/lower limit
• Communication: RS485, Modbus
• Power: 24 VDC
• Cable length: 2.0 m (standard)
• Display: 128 × 64 OLED
• Totalizer: Six digits
• Data storage: Daily, monthly, annual, accumulated
• Ambient temperature (compact): 0 to 50 °C
• Protection: IP54
• Enclosure material: Aluminum alloy