Paddle Wheel Flowmeter

What Is a Paddle Wheel Flow Meter?

A paddle wheel flow meter is an in-line flow meter that measures the flow of liquid through a pipe using a rotating paddle wheel. Its compact display, totalizer function, 4–20 mA output, and RS-485 Modbus communication make it suitable for water and general-purpose liquid flow measurement applications.

More Information About Paddle Wheel Flow Meters

Paddle wheel flow meters measure flow using paddles that rotate as the fluid passes through the pipe. The rotational speed of the paddle wheel is proportional to the flow rate. Suitable for measuring low-viscosity liquids such as water, oil, and chemicals, these flow meters offer moderate accuracy, fast response, easy installation, and straightforward maintenance. Because the sensor comes into direct contact with the liquid, periodic cleaning may be required when used with certain fluids.

Paddle wheel flow meter operating principle

Bidirectional Flow Measurement

AxelSense’s patented flow measurement technology detects the direction of paddle wheel rotation, enabling bidirectional flow measurement. This distinguishes it from conventional paddle wheel flow meters from other brands that use Hall effect sensors capable of detecting rotation but unable to determine its direction. The technology also provides flow direction information and calculates positive, negative, and net flow, meeting a wide range of flow measurement requirements.

AS510 Paddle Wheel Flowmeter Models

Models	Measurement Range	Connection Standard	Housing Options	Output Signals
FP-AS510-FP-P015	2-120 L/min	1/2" (DN15)	UPVC (stock model) PPH PVDF SS316 Stainless Steel	4-20 mA RS-485 Modbus Pulse
FP-AS510-FP-P020	3-188 L/min	3/4" (DN20)	UPVC (stock model) PPH PVDF SS316 Stainless Steel	4-20 mA RS-485 Modbus Pulse
FP-AS510-FP-P025	5-294 L/min	1" (DN25)	UPVC (stock model) PPH PVDF SS316 Stainless Steel	4-20 mA RS-485 Modbus Pulse
FP-AS510-FP-P032	7-452 L/min	1-1/4" (DN32)	UPVC (stock model) PPH PVDF SS316 Stainless Steel	4-20 mA RS-485 Modbus Pulse
FP-AS510-FP-P040	12-754 L/min	1-1/2" (DN40)	UPVC (stock model) PPH PVDF SS316 Stainless Steel	4-20 mA RS-485 Modbus Pulse
FP-AS510-FP-P050	19-1225 L/min	2" (DN50)	UPVC (stock model) PPH PVDF SS316 Stainless Steel	4-20 mA RS-485 Modbus Pulse
FP-AS510-FP-P065	33-2175 L/min	2-1/2" (DN65) Flange Connection	UPVC (stock model) PPH PVDF	4-20 mA RS-485 Modbus Pulse

Images

Fluid Temperature Data	Max. +45 °C for UPVC Housing Max. +80 °C for PPH Housing Max. +100 °C for PVDF Housing Max. +100 °C for Stainless Steel Housing
Velocity Measurement Range	Recommended: ±0.3...6 m/s Nominal: ±0.1...10 m/s
Flow Measurement Range	The measurement ranges for each size are specified in the table above.
Units	m, m3, liter, sec, min, hour, day, ft3, UK gallon, US gallon
Measurement Interval	0.5...1 sec
Power Supply	12-36 VDC
Display	Dual Display (upper display: 7-segment, lower display: LCD)
Output Signals	4-20 mA (16-bit) RS-485 Modbus Pulse
Cable - Connector	M12 8-pin connector output (A 2-meter cable is included in the package.)
Protection Rating	IP66

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