Ultrasonic Flowmeter

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AUF772 Series

Datasheet

The AUF772 Series is a sanitary ultrasonic flowmeter designed for food industry applications, featuring stainless steel housing and clamp connections for easy disassembly, cleaning, and prevention of contamination. It is ideal for processes involving mineral water, soy sauce, jam, beer, juice, rice wine, milk, and similar products, as well as sanitation and chemical industries. The flowmeter provides non-contact measurement with clamp-type sensors and a two-line LCD display for flow rate, totalizer, and signal condition. It supports wide velocity ranges (0.01 to ±32 m/s) with high accuracy of ±0.5% of reading. Key features include 4-20 mA, pulse, RS485, and HART outputs; self-calibration; real-time measurement calibration; accurate and stable measurement; and a quick response time of less than 1 second. Totalizer data can be stored for up to 1 year.

Technical Specifications

Measuring Principle	Transit time difference
Pipe Size	40-200 mm (1-1/2" – 8")
Body Material	Measuring Tube: S.S. 304 / S.S. 316 / S.S. 316L Housing: S.S. 304 Separation Box: Aluminum alloy Process Connection: IDF Tri-Clamp or Screw Union Tri-Clamp Standard: HAB / DIN32676 / ISO2852 Screw Union Standard: DIN11851
Max. Pressure	1.0 MPa
Max. Temperature	-40~70 °C (Standard) -40~160 °C (Optional)
Display	2 Line LCD with illumination Flowrate: 7 Digit with decimal point Totalizer: 8 Digit, Forward, Reverse & Net values. Engineering Unit: m3 , L, USgal, USbbl, ft3 Time Unit: sec, min, hour, day Energy Unit: car/h, Kcal/h, Mcar/h, MJ/h, GJ/h, BTU/h Other: Velocity, Date, Time, Signal condition
Accuracy	+/-0.5% of reading (0.5-30 m/s)
Repeatability	+/-0.2% of reading
Keypad	16 Key with tactile action
Response Time	<1 s
Resolution	0.0001 m/s
Flow Velocity	0.01 ~ +/-32 m/s
Ambient Temperature	-20~50 °C
Transmitter Mounting	Wall mounting
Max. Cable Length	100 m
Power Consumption	<3W
Power Supply	90-260 VAC 50/60 Hz and 24 VDC +/-10%
Data Storage	Operation parameters and totalizer figures are stored by EEPROM for more than 10 years
Current Output	4-20 mA
Pulse Output	1 unit / pulse Rating: 12-24 VDC, 50 mA Max.
Communication	RS485 (MODBUS) (Standard) HART (Compatible) (Option)
Protection Class	Converter: IP65 Sensor: IP67