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PTFE Liquid Flow Sensors


PTFE Liquid Flow Sensors | FPR-1500

PTFE Liquid Flow Sensors

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  • Provides Highly Linear 0 to 5 Vdc Output Signal and Buffered Linear Pulse Output Signal for Totalizing
  • Micro-Liquid Flow Rates as Low as 15 ml/min Can Be Measured with High Precision
  • Usable with a Variety of Low Viscosity Liquids Including Many Corrosive Liquid Chemicals
Turbine, Paddle Wheel & Positive Displacement Flow Meters - View related products


FPR1501 Series flow sensors can measure extremely low flow rates from 15 mL/min. They are suitable for a wide variety of industrial, commercial, and laboratory flow applications.

Because the FPR1501 flow sensors have only PTFE and sapphire wetted surfaces, it is anticipated that they will replace conventional glass tube and ball flowmeters in many applications in which an electrical signal proportional to flow rate is desirable, even in very corrosive applications in which the liquid is low in viscosity (i.e., less than 10 centistokes).

Models use a Pelton-type turbine wheel to determine the flow rate of the liquid. The rotation rate of the turbine wheel is linear over a large dynamic range. The electro-optical system consists of a diode emitting energy in the infrared spectrum. Light energy is interrupted and passed from 8 small holes in the small turbine wheel. This reflected light energy is detected by a photodiode. Thus, as the turbine wheel rotates in response to the liquid flow rate, electrical pulses are generated. Processing circuitry provides a DC voltage output and buffered square-wave output pulses that are proportional to the flow rate.

Tube Fitting:
1/8" tube fittings for flowrates up to 100 ml/min
¼" tube fitting for flow rates from 100 ml/min. to 2 liters/min
3/8" tube fitting for flow rates greater than 2 liters/min.

Output Signal: 0 to 5 Vdc, adjustable ±20% (typical) and pulse output from 0 to 300/500 pps (typical) @ 7.5 Vdc peak pulse height-linear
Power Requirements: 12 to 15 Vdc regulated, 50 mA
Standard Sensor Material: PTFE, sapphire, Perfluoroelastomer gasket; PFA compression tube fittings
Pressure Rating: 4 bar (60 psig) max
Temperature Rating: 0 to 70°C (32 to 158°F)
Temperature Sensitivity: ±0.2%/°C
Accuracy: ±3% FS
Repeatability: ±0.2% FS from 20 to 100% of rated max flow
Dimensions: 55.6 x 48.0 x 58.9 mm (2.19 x 1.89 x 2.32") not including fittings
Applicable Liquids: Many low-viscosity (<10 centistokes) liquids; check compatibility with wetted materials; specify liquid when ordering
(Specify Model Number)

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Part Number/Desc.
Consult Sales  
15 to 100 ml/min, 1/8" tube fitting
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25 to 200 ml/min, 1/4" tube fitting
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50 to 500 ml/min, 1/4" tube fitting
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100 to 1000 ml/min, 1/4" tube fitting
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0.2 to 2.0 l/min, 1/4" tube fitting
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0.5 to 5.0 l/min, 3/8" tube fitting
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Power supply, 115 Vac to 12 Vdc
Consult Sales  
Power supply, 230 Vac to 12 Vdc, with European plug
Availability: 2 weeks
Analog input panel meter with 12 volt excitation
All prices on this site are shown in Taiwan Dollars.
Note: Comes complete with 0.9 m (3') long cable with pigtails and operator's manual.

Note: Maximum differential pressure (delta P) across flow sensor occurs at maximum rated flow using water at 23°C (73°F). At 50% of rated flow,delta P is 0.25 of value at max. rated flow, and, at 20% of rated flow, delta P is 0.04 of value at max. rated flow.

Ordering Example: (1) DP25B-E 1/8 DIN Panel meter with 12 volt excitation, TWD15,943 
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