User Manual / Data Sheet
Contents
1. Tighten the screws to a torque of 10 in Ibs hand tighten with a normal screwdriver 11 Install the flow meter in your system Turn on liquid flow and check for leaks at the faceplate and connecting ports Tighten all connections as required to eliminate leaks Section 7 General Proteus 5 Year Warranty A full statement of our Warranty is available at our website www Proteusind com Certifications 300 amp 100XT Series products are rated under the German Bauart standards as Installation Category 11 not for Heavy Industrial installation They are Class 11 devices no earth ground provided Trademarks Celcon Nylon and Kynar are registered trademarks of Celanese Plastics DuPont and Elf Autochem Real Tuff Hercules Loctite and SWAK are trademarks of their respective holders Page 15 of 19 Print Review Date 28 April 2003 Doc No 620300 002 Review Date 28 April 2003 Technical Reference Manual for 300 amp 100XT Flow Sensors Section 7 Reference Data Sheets amp Specifications 300 3000 Data Sheet amp Specifications Display is no longer available Do not include this in new designs Page 16 of 19 Proteus Digital Display Flowmeter The Proteus digital display flowmeter is an inexpensive compact and accu rate way of monitoring a Proteus 300 series flow sensor or 100 series flow switch The flow switch must have a meter interface option specified at the time of order2. any other body type VV 24 110 or 220 which signifies the operating voltage 24VDC 115 or 220 VAC A Analog option Blank no analog output For example a flow meter model G3002C24 would display in GPM It would monitor a Celcon body sensor or flow switch over a flow range of 0 5 to 2 5 GPM The meter would be powered by 24 VDC No analog option output is included 300 3000 Data Sheet amp Specifications Proteus Flow Sensor Pulsed Electrical Output Visual Flow Indication Models Span 0 08 to 60 0 GPM Use with Proteus Meter or Your Own Electronics Proteus flow sensors use a turbine principle to generate a pulsed voltage that varies with flow The output may be converted to flow rate by a Proteus flow meter or may be used directly by the customer Magnets in alternate spokes of the rotor induce a voltage in a pickup coil when the flow turns the rotor FLOW RANGE WORKS WITH Meter Display GPM LPM Sensor Flow Model Model Switch l 3001 0 1 1 0 0 38 3 8 301 100 low range 3002 0 5 2 5 1 9 9 5 302 100 intermediate range 3003 0 8 6 0 3 0 22 7 303 100 high range 3004 0 08 0 8 0 3 3 0 304L 100L 3050 1 5 12 0 5 7 45 4 350 150 3055 4 0 20 0 15 1 75 7 355 155 3060 6 0 30 0 22 7 113 6 360 160 3070 10 0 60 0 38 0 227 370 170 The voltage output varies in frequency and amplitude with the flow The maxi mum frequency is approximately 100 Hz while the maximum a
3. DIGITAL DISPLAY 1 2 inch characters are easy to read on the 3 1 2 digit LCD display You will see a continuous display of flow rate GPM LPM gallons or liters per minute or frequency Hz on the LCD HOW IT WORKS A flow sensor or flow switch is installed in the flow line to be mon itored and the electrical output is connected to the input of the meter Flow passing through a sensor spins a magnetic rotor which induces a pulsed voltage in the sensor s pickup coil The voltage level is then con verted to a digital signal to drive the 3 1 2 digit display UNIT SELECTABLE A two position switch accessible through the back cover selects the display units of flow rate or frequency Frequency is useful for field calibration CALIBRATION In the field calibration is accomplished by a simple procedure of referencing a flow and adjusting two potentiometers Alternatively the meter can be cali brated by the factory To calibrate in the field you will need a reference meter or other method of determining the actual flow to be displayed on the Proteus flow meter SPECIFICATIONS Input low voltage two wire sensor signal Dimensions 4 5 x 4 5 x 2 5inches 11 4x 11 4 x 65cm Weight less than 1 pound 0 5 kg Case fire retardant ABS plastic Operating Voltage 115 220 VAC 10 50 60Hz or 24VDC 20 30VDC current draw 5 mA Operating Temperature 32 F to 95 F 0 C to 35 C Accuracy 4 of reading
4. Series Sensors 22 590 CUT SUT FOR VIEWING ROTOR 9 1 700 CUT OUT 2PLS S 6 188 8 32 SCREWS MOUNTING PANEL t THICXNESS OF 777 MOUNTING PANEL 1 Remove screws holding the faceplate to the sensor body Place the sensor behind the panel and insert the longer screws you have selected 3 Secure the screws in the body with a torque of 10 in Ib Finger tight with a flat blade screwdriver Page 4 of 19 Print Review Date 28 April 2003 Plumbing Connections Note Before connecting a sensor into your fluid line verify that the normal flow rates expected in that line are within the operating range of the sensor as shown in Table 1 Extended use above the rated maximum flow rate of the sensor will reduce its useable life Note It is recommended that connections to the stainless steel flow sensor be made with stainless steel or materials of similarly chemical inertness to minimize potential corrosion damage Note The flow response of the sensor and thus its output response may be dependent on the internal diameter ID of an incoming pipe or the ID of a tube connection If the ID of your pipe or tube fitting where it connects to the inlet port is LESS than the value shown in Table 2 calibration values may be invalid MODEL INLET INSIDE 300 100xT PORT DIAMETER Plastic Metal Not Sensitive Plastic 0 280 Metal 0 355 Plastic Metal Not Sensitive Plastic 0 540 Metal 0 605 Plastic
5. one least significant digit system accuracy with 300 series flow sensor Humidity 10 to 90 no condensing WARRANTY Proteus Flow Meters are covered by our 5 year warranty MOUNTING In a panel cut a hole large enough to slip the back assembly through and then drill 4 holes for the case screws to serve as mounting screws Alternatively the case screws may be used to mount the meter electronics off of a bracket OPTIONAL ANALOG OUTPUT This analog output is proportional to a sensor s flow rate and ranges from 0 to 5 volts The analog output can be used for numerous applications including automatic feedback control chart recording and an alarm Print Review Date 28 April 2003 Doc No 620300 002 Review Date 28 April 2003 Technical Reference Manual for 300 amp 100XT Flow Sensors CONNECTION TO THE FLOW SWITCH When ordering the meter connection for a 100 series flow switch add the letter M to the end of the flow switch model number For example 100C110M specifies the meter output on a 100C110 flow switch See the flow switch data sheet and price list for more information on flow switches METER MODEL NUMBERS Model numbers are in the form of U 30 XX B VV A Flow Rate Units Flow Range Sensor Body Material Operating Voltage Analog Option U GorL which signifies the flowrate units GPM or LPM XX the flow range B Cor M which signifies the sensor body material type C Celcon body M
6. proportional to the rotational velocity of the rotor and the linear velocity of the liquid as it passes through the sensor body The amplitude of the voltage generated in the induction coil is a more reliable indicator of flow rate than frequency Page 3 of 19 Print Review Date 28 April 2003 Section 2 Physical Installation CAUTION It is generally undesirable to mount any plumbing connections directly over electronic controls or instruments WARNING If the 300 or 100XT Series flow sensor is mounted in a vertical pipeline any leakage from the topmost connection could enter the unit and cause permanent damage to the induction coil Pipe or tubing mounting If rigid piping or tubing is used the 300 and 100XT flow sensor may be supported by direct connection to the pipe or tubing Panel mounting To mount the sensor behind a panel two of the faceplate securing screws will need to be replaced with longer screws to compensate for the thickness of the panel Ensure that the screws are not so long that they will touch the bottom of the tapped hole or rip through the back of a plastic body if over tightened Evenly space up to six holes for 8 32 screws on a 2 5 circle Using the two holes on the horizontal plane is usually sufficient to support smaller flow sensors and all plastic sensors If you wish the rotor to be visible cut a 127 diameter hole with the same center Panel Mounting of 300 amp 100XT
7. 0 540 Metal 0 605 Plastic 0 730 Metal 0 815 Plastic 0 900 Metal 1 050 Table 2 Minimum ID of pipe or connection for calibrations to be valid Note The flow response of 300 Series flow sensor and the 100XT flow transducers may be dependent on the form of a device attached to the inlet connection and other closely located up stream devices Elbows T pieces valves and filters located immediately up stream from the flow sensor can introduce swirling motion to the liquid flow The swirling motion reduces the linear velocity of the flow stream We recommend that a straight run of pipe of more than 10 x pipe ID be used between the flow sensor and any up stream devices to minimize these effects Page 5 of 19 Print Review Date 28 April 2003 Note continued Appropriate calibration procedures must be used to provide an accurate flow measurement with elbows or T pieces that must be attached directly to the inlet connection The 300 and 100XT Series sensors are typically unaffected by the form or proximity of devices on their downstream side Sensor Orientation For the best results 300 Series flow sensors and 100XT flow transducers should be mounted with the faceplate in the vertical plane Mounting the device with the flow connections uppermost can help eliminate entrained air from your system Flow Direction The polarity of the output voltage is dependent on flow direction Some senso
8. NOT recommended for inclusion in new designs Flow sensors with Hall Effect sensors are better suited for interfacing with current electronic devices Refer to the PS600 Series for information or contact Proteus for assistance in selecting a sensor best suited to your application 300 amp 100XT Series flow sensors provide an output frequency proportional to the flow rate of the liquid passing through the sensor 300 Series Flow Sensors include a plastic back cover to enclose the sensing induction coil and provide two wires for connection to the user s control circuit 100xT Flow Transducers are the flow sensing portion of the 100 Series Flow Switch The 100XT flow sensor has no protective cover and provides 2 spade connectors for quick electrical connection FLOW RANGE INLET OUTLET PIPE GPM LPM PORT PORT SIZE 304L 100L 0 08 0 8 0 3 3 0 Ya NPT 301 0 1 1 0 0 4 3 8 Va NPT 303 0 8 6 0 3 0 22 7 Ya NPT 350 1 5 12 0 5 7 45 4 V2 NPT 355 4 0 20 0 15 1 75 7 V2 NPT 360 6 0 300 227 113 34 NPT 370 10 0 60 0 378 227 1 NPT Table1 Flow Ranges amp Connections How do they work The rotor spins when liquid flows through the sensor body Induction coil Magnets in the rotor create a voltage in an induction coil mounted in the sensor body The amplitude of the induced voltage is at a maximum when the magnet is immediately adjacent to the coil Rotor Both the frequency and amplitude of the induced voltage are
9. Proteus 300 Series Sensors 100xT Series Transducers User Manual Mke RAELY 300 series sensors and 100xT transducers use a turbine principle to generate a pulsed voltage that varies with flow Magnets in alternate spokes of a rotor induce a voltage in a pickup coil when flow turns the rotor The variable frequency output from this simple and reliable sensor may be read by your electronics to determine flow rate Page 1 of 19 Print Review Date 28 April 2003 Contents Page Section 1 Overview 3 Section 2 Physical Installation 4 Pipe or tubing mounting Panel mounting Plumbing Connections Filtering Section 3 Electrical Connections 7 Output Signal waveform Output Signal amplitude Section 4 Flow Response 8 Response Graphs Calibration Section 5 Maintenance 13 Section 6 General 15 Warranty Certifications Trademarks Section 7 Reference Documents 15 300 3000 Series Flow Sensor Data Sheet 100 Series Flow Switch Data Sheet Can we Improve Tell our President Can we improve our product our support or this manual We are committed to continuous improvement and welcome your help Fax mail or e mail your ideas to me Jon Heiner If you include your phone number will give you a personal reply Or if you prefer call me on my direct line Phone 650 943 4102 Fax 650 965 9355 E mail Jon proteusind com Page 2 of 19 Print Review Date 28 April 2003 Section 1 Overview These products are
10. and external testing with a dilute soap solution can help identify leaking connections Filtering Your circulating fluid may contain particles While not essential to the operation of the flow sensor it is good practice to filter your fluid A 100 micron filter is often used to remove rust and other particles from the fluid This can increase the lifetime of pumps and other fluid system components as well as reducing wear in the sensor Fluid Temperature Range Flow sensors with plastic bodies should not be used above 75 C Metal bodies with metal faceplates may be used with liquids to higher temperatures The induction coil should not be used for temperatures above 110 C For higher temperature situations contact Proteus Applications for assistance in selecting the flow sensor best suited to your application Section 3 Electrical Connections Note Only personnel familiar with the electrical circuit and control functions of the system in which the sensors are to be included should perform installation of this product The 100XT transducer provides two male spade type quick disconnects to connect to the coil output Two matching female connectors Panduit P N DNF1 8 206Fl B M are shipped with each transducer 300 Series Flow Sensors have a 2 wire cable connecting to the coil output The signal wire color codes are clear and black Output Signal The output signal is the voltage generated by the magnets in three spokes o
11. designates Transducer Celcon is a registered trademark of Celanese Plastics 100 Seriea Noi SWI peras tuse Dom fa p connection to appropriate ports ques i chart the middle and upper flow ranges are the ed down as shown in the same as for the 100 which are selected by low flow range is shift Print Review Date 28 April 2003
12. f the rotor passing by the pickup coil The waveform varies somewhat with flow rate It is similar but not identical to a rectified sine wave A typical waveform is shown below Half peak width TT lt f 0 1T T period secs f frequency Hz Page 7 of 19 Print Review Date 28 April 2003 Doc No 620300 002 Review Date 28 April 2003 Technical Reference Manual for 300 amp 100XT Flow Sensors NOTE The electrical polarity of the coil output is sensitive to the direction of flow through the sensor body Some user designed electronics may be sensitive to the polarity The polarity of the output signal can be reversed by reversing the connections at the induction coil of the 100XT transducer or reversing the wire connections of the 300 Series Flow Sensor Output Amplitude The amplitude of the output signal increases with frequency A typical output response is shown below o a gt 5 e 2 oO 40 60 80 100 Frequency Hz Figure 1 Typical output response Section 4 Flow Response The typical response curves for 300 and 100XT Series sensors are illustrated NOTE These response curves were collected with Schedule 40 brass or polypropylene pipes threaded directly into the appropriate inlet ports Table 2 above shows the ID s of pipes used to obtain the reference flow response data Proteus sensors are sensitive to the internal inside dia
13. meter ID of the pipe or hose connection at the inlet port Connections that have ID s less than that of Schedule 40 pipe will provide a HIGHER response Connections that have ID s greater than that of Schedule 40 pipe or introduce swirling motion into the liquid stream will provide a LOWER response Page 8 of 19 Print Review Date 28 April 2003 Doc No 620300 002 Review Date 28 April 2003 Technical Reference Manual for 300 amp 100XT Flow Sensors 1 4 LOW LOW RANGE TYP CURVE X04 Flow range 08 to 6 GPM Flow in GPM 0 10 20 30 Frequency in Hz IN MEE MK d e i LM E Flow in GPM Frequency in Hz CELCON BODY e METAL BODY Page 9 of 19 Print Review Date 28 April 2003 Doc No 620300 002 Review Date 28 April 2003 Technical Reference Manual for 300 amp 100XT Flow Sensors a E i LLL EL Flow in GPM Frequency in Hz CELCON BODY METAL BODY Frequency in Hz CELCON BODY e METAL BODY Page 10 of 19 Print Review Date 28 April 2003 Doc No 620300 002 Review Date 28 April 2003 Technical Reference Manual for 300 amp 100XT Flow Sensors 1 2 LOW RANGE TYP CURVE X50 Flow range 1 5 to 12 GPM Flow in GPM Frequency in Hz CELCON BODY METAL BODY Flow in GPM Frequency in Hz 4a CELCON BODY METAL BODY Page 11 of 19 Print Review Date 28 April 2003 Doc No 620300 002 Review Date 28 April 2003 Technical Refe
14. mplitude is 500mV peak to peak SPECIFICATIONS Fluid Temperature 45 to 100 C 50 to 212 F maximum 75 C 157 F with Celcon body Maximum Pressure 100 psi 6 9 bar with polysulfone face plate 250 psi 173 bar with metal faceplate 18 psi 5 2 bar with Celcon body Wetted Material Polysulfone brass or 316 stainless steel face plate 316 stainless steel pin Buna N O ring Carbon fiber filled nylon rotor Celcon brass 316 stainless steel or polypropylene body Units with polypropylene bodies have car bon filled Kynar rotors and Viton O rings Viscosity Low to moderate viscosity up to 120 centistokes or 30 weight oil Pressure Drop 3 psi maximum for all models except Models 304L and 301 6 psi maximum Weight 1 to 2 lbs 0 6 to 1 Kg MODEL NUMBERS 3XXB FF Flow Range Body Material Faceplate 3XX signifies flow range Pipe FLOW RANGE Model Fitting GPM LPM 301 V4 NPT 01 10 038 38 302 V4 NPT 05 25 19 95 303 V4 NPT 08 60 30 227 304UL 1 4 NPT 008 08 03 30 350 V2 NPT 15 120 57 454 355 1 2 NPT 40 200 151 757 360 3 4 NPT 60 300 227 1136 370 1 NPT 10 0 60 0 380 227 The 304L is available only in Celcon and the 370 is only available in brass and stainless steel All the other models are available in either Celcon brass or stain less steel 1 4 except 304L and 1 2 models are available in polypropylene B signifies body material type C for Celcon B for brass SS for 316
15. nduc tive load With inductive load maxi mum surge must not exceed 3 0 Amp Mechanical rating above one million cycles Maximum Distance to Electronics 30 feet 10 meters from transducer portion of switch Hysteresis 15 typical Hysteresis is the differ ence in the point the switch is tripped by rising flow and by falling flow Some hysteresis is desirable since it inhibits cycling if flow is near the trip point FIVE YEAR WARRANTY Flow switches are covered by our five year warranty The full text is given in the price list Ordering Information Flow switch model numbers are in the form 1XXBVV FF M where 1XX designates the flow range as shown in the table to the right B designates the body material C for Celcon B for Brass and SS for 316 stainless steel VV designates the input voltage 110 for 110 VAC or 24 for 20 30 VDC Page 19 of 19 FF designates the face plate material Blank for standard polysulfone F2 for brass available with brass bodies only and F3 for 316 stainless steel available with stainless steel bodies only Flow Switch Transducers The transducer is the sensing portion ofthe flow switch without the elec tronics It includes the body face rotor and coil The electrical output is a very low voltage pulse whose fre quency varies with flow Model num bers are in the form 1XXBT FF XX P and FF have the same meaning as in the flow switch model numbers shown above T
16. ng the 300 Series Flow Sensor amp 100XT Flow Transducers 4 Remove the rotor and stainless steel shaft from the flow cavity Remove the O ring from the faceplate cavity 5 Using a soft cloth dampened with water alcohol or a light detergent solution clean debris and dirt from the rotor the stainless steel shaft the inside surfaces of faceplate and the surfaces of the flow 6 Inspect the bearing surface of the rotor Inspect the stainless steel shaft If the bearing surface is worn or not round replace the rotor If the shaft shows signs of scoring or other wear replace the shaft or the whole faceplate assembly N Inspect the O ring to ensure that it is not brittle cracked or otherwise damaged If necessary replace with a 132 O ring of a material compatible with the liquid being passed through the flow meter Position the O ring on the inner rim of the faceplate Co Place the rotor in the flow cavity Position the shaft or the faceplate to locate the shaft in the rotor Page 14 of 19 Print Review Date 28 April 2003 Doc No 620300 002 Review Date 28 April 2003 Technical Reference Manual for 300 amp 100XT Flow Sensors Cleaning the 300 Series Flow Sensor amp 100XT Flow Transducers 9 Position the faceplate so that the holes in the faceplate are aligned with the screw holes in the front of the flow sensor body Replace the 6 securing screws
17. ove the set point a relay is held in its active position If it falls below the set value or fluid stops flowing the relay Model 100B110 Flow Switch actual size is switched off and triggers your alarm system An active design combats the prob lem of particle buildup which can jam many flow switches Because the rotor is constantly spinning it cleans itself of most buildup In the very unlikely event that an object in the line did interfere with the rotor the rotor would stop turning and the switch would go to alarm condition This assures you that when the switch shows fluid is flowing there is always flow through the switch Flow Visibility The clear polysulfone face plate dis plays the rotor to tell you at a glance if cooling water or other fluids are turned on The speed of the rotor shows you the approximate rate of flow Trip Point The trip point is set by adjusting a potentiometer which is mounted so that it cannot be turned accidentally Electronic Mounting The switch comes with the electron ics package mounted on the body of the switch It may be removed and mounted remotely Easy Maintenance The face plate may easily be removed to clean the chamber if necessary No other maintenance is normally needed SPECIFICATIONS Flow Ranges Models covering the range from 0 08 to 60 0 GPM 0 4 to 230 LPM are available The range of each model is shown in the model numbering section Body Mate
18. rence Manual for 300 amp 100XT Flow Sensors 3 4 TYPICAL CURVE X60 Flow range 6 to 30 GPM Flow in GPM z a o 2 i 10 20 30 40 50 60 70 80 90 100 110 120 130 Frequency in Hz l Page 12 of 19 Print Review Date 28 April 2003 Doc No 620300 002 Review Date 28 April 2003 Technical Reference Manual for 300 amp 100XT Flow Sensors Calibration Measurement of the actual response from an installed sensor is necessary to achieve an accurate response curve Calibration by Proteus is available for devices with simple small connections Contact Proteus Applications for assistance Section 6 Maintenance Maintenance of the sensor is normally limited to cleaning the chamber in which the rotor spins and annual recalibration The frequency of cleaning will vary with the type of fluid being run and the cleanliness of that fluid In most cases annual cleaning immediately prior to recalibration is sufficient Cleaning the 300 Series Flow Sensor amp 100XT Flow Transducers 1 Turn OFF the liquid flow in your flow circuit and remove the flow sensor or transducer sensor from your system Place the unit on a clean surface 2 Remove the 6 screws securing the faceplate 3 Remove the faceplate from the flow meter Page 13 of 19 Print Review Date 28 April 2003 Doc No 620300 002 Review Date 28 April 2003 Technical Reference Manual for 300 amp 100XT Flow Sensors Cleani
19. rials Brass Celcon and 316 stainless steel bodies are available For polypro pylene bodies call the factory Wetted Materials In addition to the body material selected wetted materials include polysulfone brass or 316 stainless Steel for the face plate 316 stainless steel for the shaft a Buna N O ring and a Nylon based composite rotor Please call the factory for applica tions which require FDA approved materials or have special chemical requirements Temperature The flow switches are suitable for use with fluid temperatures up to 100 deg C 212 deg F Ambient temper ature for the electronics should not exceed 50 deg C 122 deg F Print Review Date 28 April 2003 Doc No 620300 002 Review Date 28 April 2003 Technical Reference Manual for 300 amp 100XT Flow Sensors 100 amp 100 XT Data Sheet Viscosity To 120 centistokes about 30 weight oil at room temperature Pressure 100 psi 6 9 bar maximum with polysulfone face plate 250 psi 17 3 bar maximum with metal face plate Pressure Drop 3 psi 0 2 bar maximum except for the low flow range on the Model 100 which has a 6 psi 0 4 bar maxi mum Weight 2 to 6 lbs 1 to 3 Kg depending on model and materials Electrical Requirements Three options are available for input power 110 VAC single phase 50 60 Hz 30 mA 20 30 VDC 30 mA nominal 24 VDC Relay Switching SPDT with contact rated at 30 VDC 3 0 Amp for a non i
20. rs can be operated in only one direction as shown below Model Flow Path Direction 304L 104XT A to B only 301 101XT A to B only 303 103XT DtoC or CtoD 350 150XT D to C only 355 155XT DtoC or CtoD 360 160XT DtoC or CtoD 370 170XT DtoC or CtoD Table 2 Allowed flow directions NPT pipe thread connections Pipe threads seal by making metal to metal or plastic to plastic contact between male and female components Consequently they are particularly prone to the damaging effects of galling which occurs when two surfaces move against each other under pressure When installing pipe threads it is essential to use a high quality lubricating and sealing material WARNING Do NOT use anaerobic pipe sealants such as LOCTITE or SWAK brand sealants with these sensors The aggressive chemical nature of these materials can cause cracking of the polysulfone faceplate e Use Teflon tape or a PTFE based liquid sealant to provide lubrication for the junction and a leak tight connection at both input and output connections Real Tuff and Hercules are two of many suitable brands of PTFE based sealants e Donotover tighten the connection Refer to instructions for installation of the mating fittings for information on torque requirements Page 6 of 19 Print Review Date 28 April 2003 e Leak testing of all connections in your flow circuit is recommended Pressurizing the system with air
21. stain less steel and P for polypropylene FF signifies faceplate material blank for standard polysulfone F2 for brass and F3 for 316 stainless steel Proteus Industries Inc 340 Pioneer Way Mountain View CA 94041 Telephone Page 17 of 19 Print Review Date 28 April 2003 Doc No 620300 002 Review Date 28 April 2003 Technical Reference Manual for 300 amp 100XT Flow Sensors 100 amp 100XT Data Sheet amp Specifications 220 volt is no longer available Page 18 of 19 Proteus Flow Switch Active Design Assures Reliability Cannot Jam in Flow OK Position Models Span 0 08 to 60 0 GPM Adjustable Trip Point Optional Metering Output Proteus Flow Switches monitor cool ing fluids or other liquid flows and trip an internal relay if the flow rate falls below an adjustable trip point The relay may be used to shut down equipment or sound an alarm before damage is done to equipment Unlike pressure sensors the Proteus switch is a true flow interlock It will not be fooled by downstream block ages that maintain pressure while stopping flow The switch also differs from traditional flow switch designs because particle buildup cannot jam it in the flow OK position How It Works Fluid flowing through the switch spins a magnetic rotor to induce volt age in a coil This voltage is mea sured by a simple electronic circuit which compares it to a user set trip voltage When the voltage is ab
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