Ultrasonic transit-time flow meter BBUFM-F

volumefor waterfor wastewater

Product Overview
BBUFM-F is a fixed ultrasonic liquid flow meter based on the transit-time measurement principle. Its clamp-on transducers are mounted outside the pipe, allowing installation without pipe cutting or process shutdown. It is designed for continuous flow monitoring in full pipes. The meter measures instantaneous flow, velocity, forward total, reverse total, and net total. Typical applications include water supply, water treatment, chemical processing, irrigation, boiler systems, and industrial process pipelines.

Key Features

• Non-invasive clamp-on measurement with no contact with the liquid
• Designed for full pipes and tolerant of small amounts of bubbles or suspended solids
• Forward, reverse, and net flow totalization
• Analog, pulse, relay, and digital communication outputs
• Standard and extended versions for different accuracy and pipe-size requirements
• No moving parts, low pressure loss, and minimal maintenance

Typical Applications

• Industrial circulating and cooling water
• Water supply, raw water, and wastewater treatment
• Chemical and industrial process liquids
• Irrigation and water distribution networks
• Boiler and energy-system flow monitoring

Technical Specifications (table)
Parameter — Standard Version / Extended Version
Measurement principle — Ultrasonic transit time / Ultrasonic transit time
Medium — Liquid in a full pipe / Liquid in a full pipe
Velocity range — -12 to +12 m/s / -12 to +12 m/s
Accuracy — ±1.0% of reading / ±0.5% of reading
Repeatability — 0.2% / 0.2%
Linearity — ±1.0% / ±0.5%
Pipe size — DN25 to DN2000 / DN25 to DN5000
Display — 2.2 in TFT LCD, 320 × 240 / 2.8 in TFT LCD, 320 × 240
Analog output — 4–20 mA, 750 Ω maximum load / 4–20 mA, 750 Ω maximum load
Pulse output — 0–9999 Hz, OCT / 0–9999 Hz, OCT
Relay output — SPST, 1 Hz maximum / SPST, 1 Hz maximum
Communication — RS485, Modbus protocol / RS485, Modbus protocol
Power supply — 24–36 VDC / 24–36 VDC
Transmitter temperature — -40 to +60 °C / -40 to +60 °C
Standard transducer temperature — -40 to +80 °C / -40 to +80 °C
Humidity — Up to 95% RH, non-condensing / Up to 95% RH, non-condensing
Transmitter enclosure — Engineering plastic / Die-cast aluminum

Transducers and Installation
The standard configuration uses clamp-on transducers. V, N, Z, or W mounting arrangements may be selected according to pipe diameter, pipe material, wall thickness, liquid acoustic properties, and available straight-pipe length.

Available Options (table)
Item — Available Options
Transducer type — Clamp-on; insertion type optional
Transducer cable — 10 m standard; extended lengths available
Mounting method — V, N, Z, or W method
Communication — RS485 / Modbus
Remote transmission — Optional remote communication module

Selection Information

• Pipe outside diameter or nominal diameter
• Pipe and liner materials
• Pipe-wall and liner thicknesses
• Liquid type and operating temperature
• Required flow or velocity range
• Required outputs, communication, and cable length
• Installation method and environmental protection requirements

Caractéristiques / Spécifications techniques

• Measurement principle: Ultrasonic transit time
• Medium: Liquid in a full pipe
• Velocity range: -12 to +12 m/s
• Accuracy: Standard ±1.0% of reading; Extended ±0.5% of reading
• Repeatability: 0.2%
• Linearity: Standard ±1.0%; Extended ±0.5%
• Pipe size: Standard DN25 to DN2000; Extended DN25 to DN5000
• Display: 2.2 in TFT LCD (320×240) or 2.8 in TFT LCD (320×240)
• Analog output: 4–20 mA, 750 Ω maximum load
• Pulse output: 0–9999 Hz, OCT
• Relay output: SPST, 1 Hz maximum
• Communication: RS485, Modbus protocol
• Power supply: 24–36 VDC
• Operating temperature (transmitter): -40 to +60 °C
• Transducer temperature: -40 to +80 °C
• Humidity: Up to 95% RH, non-condensing
• Transmitter enclosure: Engineering plastic (standard) or die-cast aluminum (extended)
• Transducer options: Clamp-on (standard) or insertion type (optional); cable 10 m standard, extended lengths available; mounting methods V/N/Z/W