Ultrasonic Flowmeter

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AUF752 Series

Datasheet

The AUF752 Series is a fixed-mount transit-time ultrasonic flowmeter featuring clamp-on transducers for non-invasive measurement of clean, homogeneous liquids. Its user-friendly, microprocessor-based design enables field programmability and facilitates flow measurement without interrupting the process, ensuring low installation costs. The flowmeter offers a two-line LCD display for flow rate and totalizer values, with data storage for up to 10 years. It supports wide velocity ranges (0.01 to ±32 m/s) and accommodates pipe sizes from 25 to 4000 mm. Key features include high accuracy of ±0.5% of reading, outputs such as 4-20 mA, pulse, RS485, and HART, as well as self-calibration and real-time measurement calibration. Optional dual-channel functionality ensures even greater accuracy and reliability. The sensor is designed for high-temperature applications, with a maximum operating temperature of 200°C for short durations.

Technical Specifications

Measuring Principle	Transit time difference
Pipe Size	NN Type : 25-4000 mm (1"-160") HT Type : 25-4000 mm (1"-160")
Pipe Material	Cast Iron, Stainless Steel, Ductile Iron, Copper, PVC, Aluminum, Fiberglass etc.
Liner Material	Tar Epoxy, Rubber, Mortar, Polypropylene, Polystyrol, Polyethylene, Teflon, etc.
Sensor Housing	S.S. 304
Temperatue	Sensor NN : -40 ~ 70 °C Sensor HT : -40 ~ 160 °C
Display	2 Lines 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	+/-1% ~ +/-1.5% of reading (0.5-30 m/s) +/-0.5% of reading (Online calibration)
Repeatability	+/-0.2% of reading
4-20 mA Input	2 points, programable Range
Function	Temp. Measurements for Thermal Energy
Keypad	16 Keys with tactile action
Response Time	Less than 1 second
Flow Velocity	0.01 ~ +/-32 m/s
Resolution	0.001 m/s
Ambient Temperature	-20~50 °C
Mounting	Wall mounting
Max. Cable Length	100 m
Power Consumption	Less than 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)
Dimensions	270 * 185 * 67 mm
Weight	2 kg
Protection Class	Converter: IP65 Sensor: IP68 (Submersible)