The HUALIU ultrasonic open channel flowmeter is a non-contact instrument for flow measurement in open channels. Used together with various national-standard measuring weirs and flumes (such as Parshall flumes, V-notch weirs, rectangular weirs, etc.), it is widely applicable to sewage discharge monitoring, total discharge metering of water quality, and flow monitoring of industrial wastewater. The instrument has built-in algorithms for a variety of weirs and flumes, its measurement results are unaffected by water quality, and an optional communication interface allows convenient networking with DCS and other systems for remote monitoring and control.

The instrument adopts the non-contact ultrasonic ranging principle: the transducer does not contact the measured liquid directly, first measuring the liquid level height in the channel and then deriving the instantaneous and cumulative flow according to the head-flow relationship of the fitted weir or flume. A built-in EEPROM digital memory ensures no data loss after a power failure. Explosion-proof transducers suitable for petroleum, chemical and other hazardous areas are also available, making it particularly suitable for the flow measurement of oily wastewater.

The product features stable and reliable performance, high accuracy, low failure rate, and easy installation and maintenance. The level measurement accuracy reaches 0.3% and the ingress protection rating reaches IP65. Both input and output circuits provide lightning and short-circuit protection, meeting the requirements for long-term stable operation on industrial sites.