FLOW SENSORS ELECTRONIC Flow Rate Monitoring RFO Type 4.5 to 24 VDC Pulsed Output GEMS Sensors popularized the RotorFlows paddlewheel design by combining high visibility rotors with solid-state electronics that are packaged into compact, panel mounting housings. They provide accurate flow rate output with integral visual confirmation...all with an unprecedented price/performance ratio. RFO Types feature a VDC pulsed output. Typical Applications Water Purification/Dispensing Systems Chemical Metering Equipment Lasers and Welders Water Injection Systems Semiconductor Processing Equipment Chillers and Heat Exchangers Specifications Wetted Materials Body Brass, 316 Stainless Steel or Polypropylene File No. E45168 (Hydrolytically Stable, Glass Reinforced) Dimensions Rotor Pin Ceramic Polypropylene Bodies Rotor PPS Composite, Black 1 Lens Polysulfone O-Ring Viton (Alloy Bodies) Buna N (Polypropylene Body) Low Flow Adaptor Glass Reinforced Polypropylene Operating Pressure, Maximum Optional SS Face Plate 500 PSI .64 (16.3 mm) Brass or Stainless Steel Body 200 PSIG (13.8 bar) 70F (21C), 1 100 PSI (6.9 bar) Max. 212F (100C) .80 (20.3 mm) 2.50 (63.5 mm) Polypropylene Body 100 PSIG (6.9 bar) 70F (21C), 2.38 (60.5 mm) 3.06 (77.7 mm) 40 PSI (2.8 bar) Max. 180F (82C) Operating Temperature, Brass or Stainless Steel Body -20F to 212F (-29C to 100C) Brass and Stainless Steel Bodies - .25 and .50 Ports Polypropylene Body -20F to 180F (-29C to 82C) Electronics 150F (65C) Ambient Viscosity, Maximum 200 SSU Input Power 4.5 VDC to 24 VDC Output Signal 4.5 VDC to 24 VDC Pulse. (Sourcing) Pulse Rate Dependent on Flow Rate, Port Size and Range. Current Consumption 8 mA, No Load 1/4 PORTS = Current Source Output, Max. 70 mA 80 (20.3 mm) 2.50 (63.5 mm) 1/2 PORTS = Frequency Output Range 15 Hz (Low Flow) to 225 Hz (High Flow) 3.01 (76.4 mm) 87 (22.1 mm) 2.32 (58.9 mm) Accuracy See Table Below Electrical Termination 22 AWG PVC-Jacketed, 24 Cable. Color Coded: Red = +VDC Black = Ground White = Signal Output Brass Bodies .75 and 1.00 NPT Ports Notes: 1. For higher pressure/temperature ratings, stainless face plates are available. Consult factory. How To Order For standard configurations, specify Part Number based on desired body material and port size. 2.50 1.06 Flow Range GPM (63.5 mm) (26.9 mm) Body Port Size Part Low Range* Standard Range 3.94 2.95 Material NPT Number (100 mm) (74.9 mm) (Accuracy) (Accuracy) .25 0.1 to 1.0 (7.0%) 0.5 to 5.0 (7.0%) 155421 High Resolution Polypropylene Black Rotor .50 1.5 to 12.0 (7.0%) 4.0 to 20.0 (15.0%) 155481 PPS composite. Each of the six .25 0.1 to 1.0 (7.0%) 0.5 to 5.0 (7.0%) 156261 rotor arms is magnetized. A PTFE loaded bushing ensures long life50 1.5 to 12.0 (7.0%) 4.0 to 20.0 (15.0%) 156262 Brass .75 5.0 to 30.0 (15.0%) 194761 1.00 8.0 to 60.0 (15.0%) 194762 9/16-18** 0.1 to 1.0 (7.0%) 0.5 to 5.0 (7.0%) 165071 Don t Use - Replaced with RFO B&SS 1/4 &1/2 art Note: Improved accuracy can be achieved by calibrating the individual RFO unit50 1.5 to 12.0 (7.0%) 4.0 to 20.0 (15.0%) 165075 Stainless Steel 1/4 NPT-.64 (16.3 mm) .75 5.0 to 30.0 (15.0%) 194763 *With use of Low Flow Adapter supplied. 1/2 NPT-.70 (17.8 mm) See Page F-8 for more information. 3/4 NPT-.70 (17.8 mm) 1.00 8.0 to 60.0 (15.0%) 194764 **Straight thread with O-ring seal. Stock Items. F-4 Visit www.GemsSensors.com for most current information. 2.50 (63.5 mm) .25 (6.3 mm) 3.06 (77.7 mm) 1/4 NPT-2.01 (51.1 mm) 1/2 NPT-2.21 (56.1 mm) 3/4 NPT-2.51 (63.8 mm)RFO TYPE Operating Principle Pressure Drop-Typical HALL EFFECT SENSOR 12 Standard PARTIAL SENDS A VOLTAGE PULSE CUTAWAY WITH EACH PASS OF Flow 9 1/4 MAGNETIC FIELD 1/2 Ports Ports Range 6 Units 3 0 MAGNETIZED ROTOR 0 1 2 3 4 5 10 15 20 25 Flow Rate GPM 9 Low Flow FLOW OUT FLOW IN Range 6 Units 1/2 Ports 1/4 Ports 1. As liquid passes through the RotorFlow body, the magnetic rotor spins at a rate 3 proportional to flow. This causes a series of magnetic fields (the rotor vanes) to excite 0 the Hall Effect sensor, producing a series of voltage pulses. 0 .1 .2 .3 .4 .5 .6 .7 .8 .9 1.0 2 3 4 5 10 15 Flow Rate GPM 2. The output pulses (RFO) are at the same voltage level as the input (4.5 - 24 VDC) with a frequency proportional to the flow rate. The output signal can be utilized by 12 High Flow digital rate meters totalizers or other electronic controllers. RFA Type analog sensors Units 9 condition the output signal to 0-10 VDC. 3/4 6 3. RotorFlow Indicators may be mounted with flow entering either port. Performance Ports is optimized by positioning ports at the top of the unit, in a horizontal plane. 3 1.0 Ports 0 0 10 20 30 40 50 60 70 80 90 100 110 Frequency vs. Flow Rate-Typical Flow Rate GPM Output Frequency Hz Signal Output RFO Model Based on Port Size Output signal for RFO Types is an on/off pulse of the Flow Rate .25 with .50 with .25 .50 .75 1 DC voltage supplied to the unit, it is compatible with all (GPM) Adapter* Adapter* digital logic families. Input voltage range is 4.5 to 24 0.10 13 VDC. Frequency of the output pulse is proportional to 0.25 41 the flow rate and ranges from approximately 15 Hz at 0.50 15 90 low flow to 225 Hz at high flow. 0.75 137 1.0 34 186 Example: 12 12 +VDC +VDC 1.5 54 17 Low Flow 2.0 73 25.9 2.5 90 34 0 0 3.0 110 43 TIME TIME 3.5 128 12 12 4.0 148 34 60 +VDC +VDC High Flow 4.5 168 5.0 185 44.8 76.7 24 6.0 55 94 0 0 TIME TIME 7.0 65.9 111 8.0 76 129 22 Note: Consult factory for flow rate/frequency curves. 9.0 87.5 147 10 99 165 61 30 11 110 185 12 122 204 13 135 14 147 15 158 93 43 16 170 17 183 18 195 19 207 20 220 128 60 25 163 74 30 196 91 35 107 40 123 45 137 50 153 55 170 60 185 *Low Flow Adapter F-5 Visit www.GemsSensors.com for most current information. PSI PSI PSI FLOW SENSORS ELECTRONIC