Flow Measurement & Control


Reliable clamp-on flow measurement

May 2010 Flow Measurement & Control

Tokyo Keiki’s non-intrusive, clamp-on type flowmeters minimise pressure loss and the effects of deterioration of ageing pipes to ensure that high measurement accuracy and stability is maintained over time. The advantages of these flowmeters include simple and easy installation, especially on existing pipes, compared to intrusive ‘wet’ type meters.

However, the retention of optimum performance after extended years of use is a great challenge for clamp-on type flowmeters. To overcome this, the transducers (sensors) are mounted using banded stainless steel wires and special adhesive wells attached to the pipe. This ensures that good signal quality and stability are sustained, even over prolonged periods of time.

For instance, an ultrasonic flowmeter of the UF-700 series has been in operation at a Japanese hydroelectric power plant for more than 25 years. Despite the build-up of calcified scale over time, this flowmeter has continued to function reliably – a testament to the product’s robust design.

The latest stationary flowmeter, the UFL-30, is the successor to the legacy UF-700 series. These high-performance products are based on extensive application experience to ensure that they meet the demanding requirements of the global market. The UFL-30 can be connected with up to four pairs of transducers (4-path) for a stable measurement even under turbulent conditions and in short pipe lengths. The flowmeter is suitable for pipe diameters from DN25 to DN6000 with a -30 to +30 m/s measurement range and 1 mm/sec resolution velocity. Among the advanced features is the variety of outputs offered: two analogue outputs and four relay or two digital outputs (RS232C or Modbus) as standard. These attributes provide the flexibility and convenience that enable the UFL-30 to cover a wide range of applications.

For more information contact Jan Raaths, Atlanta Instruments, +27 (0)12 666 8481, [email protected], www.atlanta.co.za



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