Ultrasonic transit-time flow meter BBUFM-DP

volumefor liquidsDN25 - 1"

Product Overview
BBUFM-DP is a fixed clamp-on ultrasonic transit-time flow meter using two independent acoustic paths on the same pipe. Each path provides flow rate, velocity, positive/negative/net totals and diagnostic data. Clamp-on transducers are mounted externally without cutting the pipe, enabling non-invasive measurement on existing pipelines.

Key Features

• Dual acoustic paths for improved stability and cross-check diagnostics
• Independent flow, velocity, totalizer and error diagnostics per path
• Non-invasive clamp-on installation — no contact with the liquid
• Operates on full pipes and liquids with low levels of bubbles or suspended solids
• Outputs: 4–20 mA, pulse, relay and RS485 (Modbus)
• No moving parts, low pressure loss and minimal maintenance

Typical Applications

• Critical water-supply and industrial circulating-water lines
• Water and wastewater treatment plants
• Chemical and industrial process lines
• Irrigation and large water-transfer pipelines
• Measurement points requiring enhanced stability and diagnostics

Technical Specifications
Measurement principle: Ultrasonic transit time
Acoustic paths: Dual path
Medium: Liquid in a full pipe
Velocity range: -12 to +12 m/s
Accuracy: ±0.5% of reading; ±0.01 m/s in low-velocity range
Repeatability: 0.15%
Linearity: ±0.5%
Pipe size: DN25 to DN5000
Analog output: 4–20 mA, 750 Ω max load
Pulse output: 0–9999 Hz, OCT
Relay output: SPST, 1 Hz max
Communication: RS485, Modbus protocol
Power supply: 24–36 VDC
Display: 3.5 in TFT LCD, 480 × 320
Transmitter temperature: -40 to +60 °C
Standard transducer temperature: -40 to +80 °C
Humidity: Up to 95% RH, non-condensing
Applicable turbidity: 0–12000 NTU
Applicable pH range: 6–9
Transmitter enclosure: Die-cast aluminum, IP54
Transducer protection: IP68
Standard transmitter weight: approx. 1.5 kg
Standard transducer-set weight: approx. 1.5 kg
Standard cable length: 10 m (extendable to 200 m)

Display and Diagnostics

• Flow rate and velocity displayed for both paths
• Positive, negative and net flow totals
• Independent status and diagnostics per path
• Error codes and diagnostic information for installation assessment

Transducers and Installation
Standard: Dual-path clamp-on transducers mounted externally on the pipe. Optional: insertion transducers where applicable. Standard cable length 10 m, extendable up to 200 m in 5 m increments. Mounting methods: V, N, Z or W depending on pipe and application. Transmitter is wall-mounted.

Selection Information

• Pipe outside diameter or nominal diameter (DN)
• Pipe material, liner and wall thickness
• Liquid type, turbidity and operating temperature
• Required flow or velocity measurement range
• Transducer mounting arrangement (V/N/Z/W)
• Required outputs, communication protocol and cable length

Model / Technical Summary

• Model: BBUFM-DP
• Measurement principle: Ultrasonic transit time
• Acoustic paths: Dual path
• Pipe size range: DN25 to DN5000
• Velocity range: -12 to +12 m/s
• Accuracy: ±0.5% of reading; ±0.01 m/s low-velocity
• Outputs: 4–20 mA, pulse, relay, RS485 (Modbus)
• Power: 24–36 VDC
• Display: 3.5 in TFT LCD
• Enclosure: Die-cast aluminum, IP54; Transducers IP68