Flow Rate Monitoring - RFO Type 4.5 to 24 VDC Pulsed Output GEMS Sensors popularized the RotorFlow's 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 FLOW SENSORS - ELECTRONIC Brass, 316 Stainless Steel or Polypropylene (Hydrolytically Stable, Glass Reinforced) Rotor Pin Ceramic Rotor PPS Composite, Black Lens Polysulfone1 O-Ring Viton(R) (Alloy Bodies); Buna N (Polypropylene Body) Low Flow Adaptor Glass Reinforced Polypropylene Operating Pressure, Maximum Optional SS Face Plate 500 PSI Brass or Stainless Steel Body 200 PSIG (13.8 bar) @ 70F (21C), 100 PSI (6.9 bar) Max. @ 212F (100C)1 Polypropylene Body 100 PSIG (6.9 bar) @ 70F (21C), 40 PSI (2.8 bar) Max. @ 180F (82C) Operating Temperature, Brass or Stainless Steel Body -20F to 212F (-29C to 100C) 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 Current Source Output, Max. 70 mA Frequency Output Range 15 Hz (Low Flow) to 225 Hz (High Flow) Accuracy See Table Below Electrical Termination 22 AWG PVC-Jacketed, 24 Cable. Color Coded: Red = +VDC; Black = Ground; White = Signal Output Dimensions File No. E45168 Polypropylene Bodies .64 (16.3 mm) .80 (20.3 mm) 2.50 (63.5 mm) 2.38 (60.5 mm) 3.06 (77.7 mm) Brass and Stainless Steel Bodies - .25 and .50 Ports 2.50 (63.5 mm) 3.01 (76.4 mm) 1/4 PORTS = 80 (20.3 mm) 1/2 PORTS = 87 (22.1 mm) 2.32 (58.9 mm) 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. Body Material Polypropylene Brass Stainless Steel Port Size NPT Flow Range - GPM Standard Range (Accuracy) Low Range* (Accuracy) 2.50 (63.5 mm) Part Number .25 0.1 to 1.0 (7.0%) 0.5 to 5.0 (7.0%) 155421 .50 1.5 to 12.0 (7.0%) 4.0 to 20.0 (15.0%) 155481 .25 0.1 to 1.0 (7.0%) 0.5 to 5.0 (7.0%) 156261 .50 1.5 to 12.0 (7.0%) 4.0 to 20.0 (15.0%) 156262 .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 .50 1.5 to 12.0 (7.0%) 4.0 to 20.0 (15.0%) 165075 .75 -- 5.0 to 30.0 (15.0%) 194763 1.00 -- 8.0 to 60.0 (15.0%) 194764 3.94 (100 mm) 2.95 (74.9 mm) High Resolution Black Rotor PPS composite. Each of the six rotor arms is magnetized. A PTFE loaded bushing ensures long life. Don'tNote: UseImproved - Replaced with RFO B&SS 1/4" &1/2" art accuracy can be achieved by calibrating the individual RFO unit. 1/4" NPT-.64" (16.3 mm) *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) **Straight thread with O-ring seal. - Stock Items. F-4 1.06 (26.9 mm) Visit www.GemsSensors.com for most current information. RFO TYPE Pressure Drop-Typical HALL EFFECT SENSOR SENDS A VOLTAGE PULSE WITH EACH PASS OF MAGNETIC FIELD Standard Flow Range Units 12 9 0 1. As liquid passes through the RotorFlow body, the magnetic rotor spins at a rate proportional to flow. This causes a series of magnetic fields (the rotor vanes) to excite the Hall Effect sensor, producing a series of voltage pulses. 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 digital rate meters totalizers or other electronic controllers. RFA Type analog sensors condition the output signal to 0-10 VDC. 6 High Flow Units Flow Rate (GPM) 0.10 0.25 0.50 0.75 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 6.0 7.0 8.0 9.0 10 11 12 13 14 15 16 17 18 19 20 25 30 35 40 45 50 55 60 .25 15 34 54 73 90 110 128 148 168 185 34 60 12 44.8 55 65.9 76 87.5 99 110 122 135 147 158 170 183 195 207 220 76.7 94 111 129 147 165 185 204 24 20 25 10 15 1/2 Ports 1/4 Ports 0 .1 .2 .3 .4 .5 .6 .7 .8 .9 1.0 2 3 4 5 Flow Rate - GPM PSI 12 9 3/4 Ports 6 1.0 Ports 3 0 Frequency vs. Flow Rate-Typical Output Frequency - Hz RFO Model - Based on Port Size .25 with .50 with .50 .75 Adapter* Adapter* 13 41 90 137 186 17 25.9 34 43 10 15 Flow Rate - GPM 3 0 3. RotorFlow Indicators may be mounted with flow entering either port. Performance is optimized by positioning ports at the top of the unit, in a horizontal plane. 012 345 9 Low Flow Range Units PSI FLOW IN 1/2 Ports 3 MAGNETIZED ROTOR FLOW OUT 1/4 Ports 6 0 10 20 30 40 50 60 70 Flow Rate - GPM 80 90 100 110 Signal Output Output signal for RFO Types is an on/off pulse of the DC voltage supplied to the unit, it is compatible with all digital logic families. Input voltage range is 4.5 to 24 VDC. Frequency of the output pulse is proportional to the flow rate and ranges from approximately 15 Hz at low flow to 225 Hz at high flow. 1 Example: Low Flow 12 0 High Flow +VDC 0 22 61 30 93 43 128 163 196 60 74 91 107 123 137 153 170 185 12 0 TIME 12 0 TIME +VDC +VDC TIME Note: Consult factory for flow rate/frequency curves. *Low Flow Adapter Visit www.GemsSensors.com for most current information. F-5 FLOW SENSORS - ELECTRONIC PARTIAL CUTAWAY PSI Operating Principle Easy Installation and Maintenance Panel Mounting A proper installation will enhance RotorFlow sensor performance. Install using standard pipe fitting tools; horizontal fluid lines are recommended. For further installation and maintenance recommendations, refer to one of the following instruction bulletins: RFO Types-Part Number 157258; RFI Types-Part Number 157259; RFS Types-Part Number 157261. Since their function is to monitor dynamic fluid flow, naturally the rotor will react to turbulence, pulsation, entrained air, and other flow anomalies induced in the flow stream by other process hardware. For optimum performance, install RotorFlow units where nominal flow conditions exist with ports located at the top. Incoming flow may be placed to either port; a minimum of 8 inches (20 cm) of straight pipe on the inlet side is required. When operating in the low flow range, the supplied Low Flow Adapter must be installed in the incoming port. 8 MIN Plastic Bodies. Two (2) mounting ears are provided at the body center line to receive #8 self-tapping screws to accommodate panel mounting of the plastic RotorFlow units. Note: ANSI T type 23 self-tapping screws are recommended. They may be replaced with standard machine screws if re-installation should be required. Brass and Stainless Steel Bodies. Two (2) mounting holes are provided on the body centerline, as shown below. #8-32UNC-2B screws are required for mounting. 2.50 (63.5 mm) (20 CM) 8 MIN (20 CM) 2.50 (63.5 mm) Incoming Flow Incoming Flow Low Flow Adapter Low Flow Adapter FLOW SENSORS - ELECTRONIC Except for straight-thread versions, RotorFlow sensors connect to piping via NPT mating thread forms.. The use of an appropriate thread sealant is necessary to assure a leak-tight connection. Permatex "No More Leaks(R)" or 2 wraps of Teflon(R) tape are the only sealants recommended for GEMS flow sensors. Straight-thread versions require an O-ring for sealing. 150 micron filtration is recommended. However, should foreign particles enter the RotorFlow sensor, accumulation is easily cleared by removing the lens from the body. The lens is removed by turning its 7/16 hex center hub 45 counter-clockwise with a standard socket wrench. To reinstall the lens, simply reverse the process. Pressure must be relieved from the system prior to sensor clean-out. O-rings should be lubricated prior to re-assembly. Low Flow Applications A low flow adapter is supplied with all Rotorflow units. It is used to produce accurate response at low flow rates. Install the adapter, as shown above, in the port selected for incoming flow. RotorFlow(R) Maintenance Kits Rebuild your RotorFlow(R) Sensors and Switches in less than 5 minutes with one of these kits. Includes: * Ceramic Rotor Pin * 6-Pole Magnetic Rotor with PPS/PTFE Bushing 2.50 (63.5 mm) * Buna N or Viton(R) O-Ring 2.50 (63.5 mm) * Polysulfone Lens Rotorflow(R) Type Line Size 1/4 & 1/2 3/4 & 1 Part Numbers Body Material O-Ring Material in Kit RFA/RFO/ RFS RFI Plastic Buna-N 155870 155872 Brass/SS (R) Viton 167364 166267 Brass/SS Viton(R) 182695 157187 - Stock Items. RotorFlow Sensor Special Capabilities are Yours for the Asking. (R) Gems caters to OEM needs with special configurations that go beyond the standards in this catalog. We can provide RotorFlow sensors with enhanced chemical compatibility, higher temperature and pressure capabilities, and alternate electrical terminations. Other Capabilities Available to OEMs: * Electrical outputs: Combined switch and frequency; transistor switching; 0-10 VDC analog. * Custom face plate (cast stainless steel face plate pictured) Buna N, Viton, EPDM, Silicon or Other Material O-Rings Polysulfone, Stainless Steel or Polypropylene Lens Panel Mounting 2.50 (63.5 mm) Tabs 2.50 (63.5 mm) PPS Composite with Teflon(R) or Nylon Loaded Bushing Long-Life Ceramic Rotor Pin RF-2500 Sensors Hydrolytically Stable Polypropylene, Stainless Steel or Brass We are committed to providing our customers with the product that best meets the requirements of their applications. Please call us and tell us what you need, and ask us about Swagelok(R) tube fittings, faceplate options, and 9/16 and 3/4 straight-thread versions. Call 800-378-1600 F-8 Visit www.GemsSensors.com for most current information.