Opposed-Transducer Ultrasonic Gas Flow Meter

Product Overview

The Opposed-Transducer Ultrasonic Gas Flow Meter is a high-precision instrument designed for real-time gas flow monitoring in challenging industrial and municipal environments. Utilizing non-contact ultrasonic measurement technology, it performs reliably under high temperature, high humidity, high dust, and viscous particulate conditions. The device calculates the line-averaged gas velocity using the transit-time difference between ultrasonic signals, ensuring accurate flow measurement even in complex flow fields. It can operate independently or integrate with CEMS (Continuous Emission Monitoring Systems), offering high versatility and reliability for municipal, industrial, and energy applications.

Working Principle

The meter operates on the ultrasonic transit-time principle. Ultrasonic signals are transmitted and received across the duct, and the propagation time difference is used to calculate the gas flow velocity, achieving line-averaged measurement. The system employs autocorrelation detection technology to maintain stability and precision in high-noise environments. Multi-channel designs (2-channel or 4-channel) are supported to accommodate large-diameter ducts and complex flow fields. The device can measure flow rates as low as 0.1 m/s and can simultaneously capture gas temperature and pressure for comprehensive monitoring.

Key Features

• High-Precision Measurement: Line-averaged ultrasonic measurement with accuracy ≤ ±1.5% F.S.
• Strong Anti-Interference: Autocorrelation detection ensures reliable operation in high-noise conditions.
• Multi-Channel Support: 2-channel or 4-channel configuration adapts to large ducts and complex flow fields.
• Non-Contact Measurement: Ultrasonic probes do not contact the gas, reducing wear and maintenance requirements.
• Durable Materials: Gas-contacting components are corrosion-resistant, suitable for acidic or moisture-laden flue gas.
• Flexible Installation: Compatible with ducts ≥0.3 m in diameter, with a low flow detection limit of 0.1 m/s.
• Comprehensive Monitoring: Simultaneous measurement of gas flow, temperature, and pressure.
• High-Speed Data Processing: Supports calibration, configuration, query, and diagnostic functions.
• Rich Interface Options: Provides 4–20 mA and RS-485 outputs for seamless integration with monitoring systems.

Applications

• Municipal Engineering: Gas flow monitoring in wastewater treatment plants, exhaust systems, and other municipal facilities.
• Industrial Applications: Measurement of flue gas flow in steel, power, chemical, and other industrial sectors to ensure emission compliance.
• Flue Gas Monitoring: Suitable for high-temperature, high-humidity, high-dust, and complex flow environments.
• Environmental Monitoring: Provides accurate flow data for environmental monitoring stations and emission compliance verification.
• Energy Industry: Flow monitoring in natural gas, coal gas, and other energy pipelines, supporting inspection and control.