Handheld Ultrasonic Flow Meters: Versatile and Non-Invasive Flow Measurement for On-Site Applications

When ultrasound propagates in a liquid, the flow rate of the liquid causes a slight change in the propagation time. The change in propagation time is proportional to the flow velocity of the liquid. At zero flow, the time required for the two sensors to generate and receive sound waves is exactly the same (the only technology that can measure zero flow in time). When the liquid is flowing, the sound wave propagation time in the countercurrent direction is longer than the sound wave propagation time in the cocurrent direction.

Features

The characteristic of ultrasound is that it measures flow rate through flow velocity. The flow rate can be calculated from the water's flow velocity.

Calculation method: ∏(3.14)*r(radius, i.e., 1/2D(Mm/1000=m)2*V(flow velocity)*3600=(flow rate)Nm3/h

That is, 3.14*(diameter/radius/1000)*minimum flow velocity*3600=minimum flow rate

That is, 3.14*(diameter/radius/1000)*maximum flow velocity*3600=maximum flow rate

Flow velocities between 0.03m/s and 0.3m/s are acceptable.

Parameters:

• Measuring Pipe Diameter: DN15-6000mm
• Temperature: 0-120°C
• Accuracy: +/-1%
• Communication: RS232 Interface
• Protection Rating: IP65
• Power Supply: NiMH battery, 10 hours of operation

(Includes accessories: measuring tape, aluminum alloy case, coupler, data cable, ruler, charger, etc.)

Advantages

• High pipe diameter adaptability: Capable of measuring flow rates in large-diameter pipes and meeting the needs of pipelines of varying sizes.
• Suitable for special media: Particularly suitable for working environments where access is difficult, observation is challenging, or manual intervention is limited.
• High measurement accuracy: Excellent accuracy, virtually unaffected by changes in media temperature, pressure, density, viscosity, and other parameters.
• Wide applicability to special media: Solves measurement challenges that other instruments struggle with, including flow measurement of highly corrosive, non-conductive, radioactive, and flammable/explosive media.

Disadvantages

• Temperature range limitation：The measurable fluid temperature is restricted by the heat resistance of ultrasonic transducers and the coupling materials between transducers and pipes.

• Insufficient acoustic velocity data ： At high temperatures, complete original data on the sound velocity of the measured fluid is lacking.

• Current application ceiling ：In China, this technology is currently only applicable to fluids below 200°C.

TDS-100H is widely used to measure liquid flow in various indus tries thanks to its advantages such as smart body,high accuracy,good repeatability,long-running cell,easy operation,built-in printer etc.