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Our products range from water meter, electricity meter to BTU meters and much more...
USonic meters lets you expand your switchgear capability and/or easily meter circuits without expensive and time-consuming redesign.
We have the perfect solution for a retrofit where there is no metering compartment available. The power meter comes standard with a NEMA 1 rated enclosure and is factory wired with the meter installed. Our Water meters are IP68 and fully submersible, which gives the advantage of protection against floods and harsh environment.
Optional modbus/RS485, BACnet®, LonWorks® communication, and pulse output are available. Also M-bus output can be provided as standard. Our products are highly recommended for Building Automation System applications.
The most diverse substances are transported and distributed in piping systems every day. The fluids flowing through pipes often have completely different properties. Therefore different principals are required for flow measurement.
One of the main ultrasonic technologies is the transit-time technology, which was initially developed by British physicist Lord Rayleigh.
The principal consist of having a pair of transducers incorporated inside the flow meter. The main transducer component is the piezoelectric, which convert the electrical energy (signal) to mechanical energy (ultrasound). As a result each transducer will send/receive signal.
The velocity range of a transit-time ultrasonic meter is typically quoted as between 0.01 m/s to 80 m/s and above. This is much wider than other flow metering technologies. However, the actual velocity range that can be accurately measured will also depend on a number of factors including: signal resolution, process conditions and pipe Reynolds number, to name but a few.
Technology comparison: Transit-time vs. Doppler
A transit-time flowmeter is based on the time difference between upstream and downstream sound propagation intervals. It provides a very good accuracy (about 1~2 percent). It works well for clean flow or flow with minor particles or little sand. Applications include pure water, sea water, wash water, sewage, process liquids, oils, chemicals, and any homogeneous liquids which are capable of ultrasonic wave propagation.
A Doppler flow meter is based on the Doppler Effect. It works well with suspension flow where particle concentration is above 100ppm and particle size is larger than 50 ~ 100 µm, but less than 10% in concentration. Doppler is easier to make and less accurate and cheaper than transit-time flow meter. The accuracy can be about 5% at best.