Plug-in paddlewheel flow sensor

The paddlewheel technology is based on a contactless transfer of the rotary motion into a frequency signal. The flowing liquid sets the paddlewheel in motion. The permanent magnets used in the paddlewheel, which are not in contact with the medium, generate a frequency signal which is proportional to the flow velocity of the liquid. The conversion of the flow velocity into a flow signal is defined by the proportionality factor K.

The paddlewheel rate sensor is designed for continuous measurement of the flow of neutral and weakly aggressive liquids containing low levels of solids. Flow speeds of 0.3 to 10 m/s can be measured. The sensor provides a frequency pulse signal proportional to the flow speed. Standardized fittings ensure easy installation of the measuring transducer in tubes ranging from DN15 to DN400 (see Data Sheet 406090).

• Simple mounting.
• For pressures up to PN10 and temperatures up to +70°C.
• Three-wire frequency pulse signal is suitable for direct connection to PLC.

 

Measuring range	0.3-10m/s
Nominal Pressure	PN 10
Medium Temperature	80°C
Nominal Pipe Width	DN 15 to DN 400
Output	Pulse frequency, 0 to 300 Hz, duty cycle 50%
Measuring Accuracy	≤ ±2.5% of the measured value (standard calibration factor); ≤ ± 1% of the measured value (Teach-In)
Parts in contact with medium	PVDF, ceramic, FKM, or EPDM
Protection Type	IP65
Voltage Supply	DC 12 to 36 V
Medium	Liquids – low viscosity, slightly aggressive, low solid content
Accessories	T-pieces; welded sockets; pipe clamps; PCV, or stainless steel