# Fluenta TFS Ultrasonic Transducers ## Part of Fluenta's entry range of ultrasonic transducers, the TFS is the base level transducer designed for use in flaring applications around the globe. [Download Data Sheet](/content/wp-content/uploads/2024/07/Fluenta-TFS-Data-Sheet.pdf) [Contact us for a quote on your project](/content/contact/detailed-enquiry-form/index.html) ## Laboratory Levels of Precision in the Field Measurement is the first step to control Fluenta’s flare gas measurement systems offer **dual ultrasound measurement modes** to ensure high accuracy in challenging conditions, utilizing both **Continuous Wave (CW)** and **Chirp signal processing** for precise “time-of-flight” determination. ### Continuous Wave (CW) Mode In **CW mode**, the system sends a signal with **constant frequency and amplitude**. This is ideal for stable, predictable flow environments. CW mode provides a steady signal that tracks gas flow with high reliability, ensuring accurate measurements when gas flow velocity is within a predictable range. ### Chirp Signal Processing Mode The **Chirp mode**, on the other hand, employs **time-varying signals** that sweep through a range of frequencies. This signal processing technique is critical for handling complex, rapidly changing gas flows, where a single-frequency signal might be inadequate. By using Chirp signals, Fluenta’s system maintains accuracy even when the flow velocities fluctuate across a wide range. This method helps isolate the gas flow signal from background noise, allowing for more precise “time-of-flight” measurements. ### Time-of-Flight Accuracy Both CW and Chirp modes rely on the **time-of-flight principle**, which measures the time it takes for an ultrasonic pulse to travel from a transmitter to a receiver through the gas. This principle allows Fluenta to achieve an impressive **±1% accuracy**, even in high-velocity or unstable gas flow conditions. The use of dual ultrasound modes means that the system can adapt to varying conditions, from slow and steady flows to high-velocity bursts, without losing precision. ### Future-Proofing and Compliance Fluenta’s ultrasonic transducers, including those equipped with **TFS technology**, provide a **non-intrusive** measurement method ideal for installations where regulations are becoming more stringent. While current regulations often require only **5% accuracy**, Fluenta’s system, with its laboratory-level precision, ensures that operators are prepared for future regulatory tightening. This is important as controlling flaring more precisely is a key focus in reducing environmental impacts. Fluenta’s dual-mode ultrasound measurement capability enables operators to maintain tight control over flare gas emissions, future-proofing their installations, and ensuring long-term compliance with evolving regulatory standards. ## Applications The Essential Role of Ultrasonic Flare Gas Measurement In today’s oil, gas, and petrochemical industries, ultrasonic flare gas measurement plays a crucial role in both regulatory compliance and operational efficiency. ### Onshore and Offshore Flare Gas Measurement Fluenta’s flare gas measurement solutions are highly adaptable and suited for both onshore and offshore oil and gas operations due to their robust design, accuracy, and ability to function in extreme environments. ## Features and Highlights - Configurations - Compact Installation - Custom Materials The TFS can be installed in either a single path or a dual path configuration. The dual path can be configured to either provide heightened security in terms of redundancy, when data continuity is of utmost importance or a more accurate measurement as with a dual path accuracy as high as ±0.1% can be achieved. To achieve accurate readings, the TFS only requires 15 pipe diameters worth of straight piping (10 diameters upstream and 5 diameters downstream) While the TFS transducer is constructed from SS316/Titanium as a standard, it may be available in other custom materials as well such as Inconel, Hastelloy, Duplex, 6Mo etc. ## Key Specifications ### Measurement Parameters Standard and actual volume flow, mass flow, totalized standard volume flow, totalized mass flow, molecular weight, standard density, actual density, pressure, temperature, speed of sound, gas velocity ### Certifications - ATEX: Presafe 17ATEX11794X - CSA: 18CA70182730 X – Class I Div 1 - Inmetro: DNV 18.0077 X ### Operating Temperature -94 to +293 °F (-70 to +145 °C) ### Operating Pressure 11.6 – 145 psiA (0.8 to 10 barA) ### Flow Velocity Range 0.1 – 394 ft/s (0.03 – 120 m/s) ### Accuracy Standard: ±2.5% to 5% Optional: ±1% to 2% ### Repeatability Better than 1% of volume flow for specific velocities ### Turn Down Ratio ## Downloads and Support - Certifications - Product Sheet - Additional services [Download TFS Ultrasonic Sensors EU Declaration of Conformity](/content/wp-content/uploads/2023/11/75.120.006.C-TFS-Ultrasonic-Sensors-EU-Declaration-of-Conformity.pdf) [Download TFS IECEX Certificate of Conformity (17.0086X Issue 1)](/content/wp-content/uploads/2023/11/75.120.228.B-TFS-IECEX-Certificate-of-Conformity-17.0086X-Issue-1.pdf) [Download TFS ATEX EU type Examination Certificate (11794X Issue 1)](/content/wp-content/uploads/2023/11/75.120.229.B-TFS-ATEX-EU-type-Examination-Certificate-11794X-Issue-1.pdf) [Download 75.120.260.C-TFS-Inmetro-Certificate-DNV-25.0031X-00-1](/content/wp-content/uploads/2023/11/75.120.260.C-TFS-Inmetro-Certificate-DNV-25.0031X-00-1.pdf) [Download TFS transducers Korean Explosion Certificate](/content/wp-content/uploads/2023/11/75.120.242.A-TFS-transducers-Korean-Explosion-Certificate.pdf) [Download TFS CSA Certificate of Compliance [70182730]](/content/wp-content/uploads/2023/11/75.120.231.C-TFS-CSA-Certificate-of-Compliance-70182730.pdf) [Download Fluenta TFS Data Sheet](/content/wp-content/uploads/2024/07/Fluenta-TFS-Data-Sheet.pdf) [Download Fluenta Compliance Standards](/content/wp-content/uploads/2025/02/Fluenta-Compliance-v2.pdf) [Download Fluenta Calibration Services](/content/wp-content/uploads/2025/04/Fluenta-Calibration-Services.pdf)