Sonotec SONOFLOW CO.55/035 Non-Invasive Ultrasonic Flow Rate Sensor; Tube OD 4.0 mm Aluminum

Non-Invasive Ultrasonic Flow Rate Sensor; Tube OD 4.0 mm
Sonoflow aluminum

The Aluminum version is standard & can be used where stainless steel is not preferred or required.

035 series sensor is designed for tube size:

Outer Diameter (OD): ~4.0 - 4.2 mm (5/32").
Suggested Inner Diameter (ID): 0.8 - 3.0 mm

Tube #: LS13

Measuring method: Ultrasound, two sections of measurements, dry coupling, no couplant required

Calibration: Sensors can be pre-calibrated by A&P Calibrations with NIST traceable certifiability. Calibration can be accomplished by the end user as well.


  • Current output for flow rate: 4 - 20 mA
  • Frequency output for flow rate: 0 - 20 kHz, 5 V digital
  • RS485 interface: bus-capable
  • Switching output: configurable as PNP / NPN / Push-Pull, 0 … 30 V

Mounting: Fixed installation: 4 fixing holes M4, 8 mm deep

Media: Acoustically transparent liquids

Sensor materials: Measuring channel: PMMA black

Housing: Aluminum

Operating voltage: 12 ... 30 VDC, maximum ripple 10 %, protection against reverse-polarity

Current consumption: Maximum 30 mA (with open current, frequency and switching output)

Electrical connection: 8-pin M12 Connector, DIN EN 61076-2-101:2012

Shielding: Required: via cable / housing (mounting screws)

Sonoflow 035 flow rate meters are available in ALUMINUM, STAINLESS, or STAINLESS with integrated DISPLAY.

Sensor Model: 
Sensor Series Family: 
Sonotec SONOFLOW CO.55/035
Applicable Industries: 
Food and Beverage

Ultrasonic Transit Time Method

With the drive to utilize more efficient processes and the need for contamination-free measure- ments, the demand for non-invasive measuring technologies is increasingly high. For this reason, SONOTEC® provides this information to guide through some basic facts about how non-invasive ultrasonic flow sensors actually work and what their operational advantages compared to invasive and intrusive measuring methods are.