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PTFE Liquid Flow Sensors
- 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
Description FPR1501 Series flow sensors canmeasure extremely low flow ratesfrom 15 mL/min. They are suitablefor a wide variety of industrial,commercial, and laboratory flowapplications.
Because the FPR1501 flow sensorshave only PTFE and sapphirewetted surfaces, it is anticipated thatthey will replace conventional glasstube and ball flowmeters in manyapplications in which an electricalsignal proportional to flow rate isdesirable, even in very corrosiveapplications in which the liquid islow in viscosity (i.e., less than10 centistokes).
Models use a Pelton-type turbinewheel to determine the flow rate ofthe liquid. The rotation rate of theturbine wheel is linear over a largedynamic range. The electro-opticalsystem consists of a diode emittingenergy in the infrared spectrum. Lightenergy is interrupted and passedfrom 8 small holes in the small turbinewheel. This reflected light energy isdetected by a photodiode. Thus, as the turbinewheel rotates inresponse to the liquidflow rate, electricalpulses are generated.Processing circuitryprovides a DC voltageoutput and bufferedsquare-wave outputpulses that areproportional tothe flow rate.
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
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