For measurement of many non-full of water, large flow or small flow, as well as the free flow of fluid of natural water condition, it is all called as the open channel flow measuring. Usually, there are larger and smaller flow with certain numbers of impurities with corrosiveness, which makes the measurement using pipe flow meter very difficult. For the application areas of the drainage of industrial enterprises, hospital waste water, agricultural irrigation, urban underground drainage, measurement with open channel flow meter would be the first choice, in particular the non-contact ultrasonic open channel flow meter. 

 Chongqing Zhao Yi technology Co., Ltd has many years of experience in measurement and control technology. To solve the problem of sewage drainage measurement for small and medium companies with small flow and low-cost industrial conditions, our company has developed a versatile, all-digital technology, intelligent and integrated drainage measurement instrument. RISEN-WS Series Ultrasonic open channel flow meter, equipped with suitable weirs, functions with principals ultrasonic waves transmitting in the air to realize the measurement of the fluid height, and constantly transmitting the information of automatic measuring the instantaneous flow, the total flow and storage to the host computing system. The instrument has adopted the international advanced technology, and with non contact of fluid, the level of fluid can be measured and the flow can be calculated. It is equipped with complete control functions, data transmission functions and man-machine communication capabilities. The instrument is composed of sending and receiving ultrasonic sensors, servo circuit, temperature compensation sensor and compensation circuit unit, accumulator host, monitor, control and serial data signal output or analog output module. 

Main features: 
■ ----- with complete independent intellectual property rights, and five high-tech innovation 
■ can be placed in a variety of different arithmetic, suitable for all kinds of open channel flow measurement weir slot (for example: According to different industrial requirements, there are varieties of thin weir, rectangular weir, full width weir, trapezoidal weir, triangular weir, Parshall slot, Venturi slot, PB slots can be chosen). 
■ with a wide range of temperature compensation and original ERD interference identification system that allows measurement of high precision and stability. 
■ original "fluid flow correction system" to ensure the automatic operation and timely compensation of flow coefficient according to the size of weir or slot and fluid level. 
■ Time of blackout moment, year / month / day / hour / minute / second, flow data, using ferroelectric double backup storage, memory can be saved for 10 years. 
■ original "block identification alarm warning system" , can detect the blockage of the neck of weir or slot, so as to avoid measurement errors. 
■ accurate full calendar with year, month, date, hour, minute and second settings, with displays of timeline and notes record. 
■ 6 groups of flow condition all sent to 485 serial data output, direct receive from PC, decimal display, easy access for users to record and check. 
■ with 4 ~ 20mA, RS485, multi info output function like switching value etc for users to switch settings. 
■ smart height measurement, digital calibration, easy installation within 50 seconds. 
■ adoption of ultrasonic non-contact measurement, no moving parts, no components within the flow tunnel, therefore there are no hidden trouble with the sensor. 
■ Best quality, multi-function, low price is what our RISEN instruments are pursuing.

Main technical parameters: 
● flow channel type: According to user requirements, all the national standard weirs and slots are optional 
● Flow range: optional from 10 L/s to 10,000 L/s 
● Flow Accuracy: 1 ~ 5% (based on the selected slot weir) 
● Level Range: 0 ~ 2 m, 0 ~ 3 m, 0 ~ 5 meters, 0 to 10 meters; 
● Blind area of probe: 0.2 ~ 0.5 m (based on the selected range, and different slot weir) 
● Level error: ± 1.0mm (at 25 ℃ still clean fluid surface) 
● Level Resolution: 1.0mm 
● Communication: 3 Waterproof touch keys (menu, backlight, power outage, clock ......) 
● Power supply: DC12V, DC24V, AC220V (according to different models) 
● Operating temperature: 0 ~ 50 ℃, optional: -20 ~ 60 ℃ 
● Display:  LED or LCD, 16-bit LCD (or blue backlight LCD) screen display 
4- bit LCD display liquid level height (resolution m, cm can be set) 
4 -bit LCD display instantaneous flow  (L / s, M3 / s unit can be set) 
8 -bit LCD display accumulative flow

16-bit LCD display full calendar clock: years Day, minutes and seconds (key switch) 
● Output: 4 ~ 20mA (the corresponding value of the instantaneous flow or level selectable) 
                0 ~ 5V (corresponding instantaneous flow or level of value selectable) 
                RS485 (time, temperature, level, instantaneous flow, accumulative flow)