Vortex Flow Sensor VFS 1-20

GRUNDFOS DATA SHEETVFS 1-20 Vortex Flowsensor standard, 1-20 l/minFig. 1 VFS 1-20 sensorTechnical overviewGrundfos Direct Sensors™, type VFS, is a series of combined flow- and temperature sensors (two-in-one) based on the principle of vortex shedding behind a bluff body. The VFS sensors are designed for high-volume production and are fully compatible with wet, aggressive media. The VFS sensor utilises MEMS sensing technology in combination with a novel packaging concept using corrosion-resistant coating on the MEMS sensor element. This makes the VFS sensor very robust and ideal for high-volume OEM applications. VFS sensors are available for flow ranges of 1-12, 1.3-20, 2-40, 5-100, 10-200 and 20-400 l/min.The trademark Grundfos Direct Sensors™ is owned and controlled by the Grundfos group.Applications• thermal management in solar heating systems• industrial process flow control• flow rate detection for pump controls• monitoring of pumps, valves and filters• cooling and temperature control• domestic hot-water systems• heat metering (solar - heat pumps).Features• flow ranges: 1-12, 1.3-20, 2-40, 5-100, 10-200 and 20-400 l/min.• based on vortex shedding• voltage output (ratiometric, ideal for use with microprocessor and PLC) • compact and robust design• approved for potable water: WRAS, KTW, W270, ACS.Benefits• no moving parts• flow and temperature sensor in one package (two-in-one sensor)• fast temperature response (direct media contact)• compatible with wet, aggressive media• cost-effective and robust construction.SpecificationsIf the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.TM03 8208 0807FlowMeasuring range 1.3 to 20 l/min Accuracy (±1s), 0 to 100 °C ±1.5 % FSResponse time (63.2 %) < 1sResolution 0.1 l/minTemperatureMeasuring range 0 to 100 °CAccuracy (±1s), 25 to 80 °C ±1 °CAccuracy (±1s), 0 to 100 °C ±2 °CResponse time (63.2 % at 50 % FS flow) < 1sResolution 0.5 °CMedia and environmentMedia typesThe sensor is compatible with liquids (kinematic viscosity = 2 mm2/s)Media temperature (operation) 0 to 100 °CMedia temperature (peak) –25 to 120 °CAmbient air temp. (operation) –25 to 60 °CAmbient air temp. (peak) –55 to 90 °CHumidity 0 - 95 % (relative), non-condensingSystem burst pressure > 16 barElectrical dataPower supply 5 V DC (± 5 %). Grounding of the sensor supply is recommended (PELV)Output signals RatiometricFlow signal 0.35 - 3.5 V (Zero at 0.35 V)Temperature signal 0.5 - 3.5 VPower consumption < 50 mWLoad impedance > 10 kOSensor materialsSensing element Silicon-based MEMS sensorSeal (sensor to housing) EPDM rubberHousing Composites (PPS, PA66)Flow pipe PPA 40-GFWetted materials Corrosion-resistant coatingEPDM, PPS, PPA 40-GFEnvironmental standardsEnclosure class IP44 (Not overmoulded IP20)Temperature cycling IEC 68-2-14Vibration (non-destructive) 20 - 2000 Hz, 10G, 4hElectromagnetic compatibility EN 61326-1DimensionsSensing element 47 x 40 x 20 mm, see drawingFlow pipe 82 x 39 x 25 mmwww.grundfos.com/directsensors96702082 1008 GBRepl. 96702082 0108 Subject to alterations.Grundfos Sensor A/S Poul Due Jensens Vej 7. DK-8850 Bjerringbro. DenmarkTelephone: +45 87 50 14 00Being responsible is our foundationThinking ahead makes it possibleInnovation is the essenceDimensions (in mm)Fig. 2 Dimensional sketches of sensing elementFig. 3 Dimensional sketch of flow pipeType keyThe sensor is labelled with a type designation. For more information, see http://www.grundfos.com/directsensors.Electrical connectionsFig. 4 Electrical connectionsPower supply requirements• 5 Vdc• separated from hazardous live circuitry by double or reinforced insulation• power limitation:150 VA; current limitation: 8 A.Sensor output signalsFig. 5 Flow response Fig. 6 Temperature response TM00 38136 0607TM03 8205 080796xxxxxx - XX - XXX XXXXXProduct numberRevisionProduction year and weekConsecutive numberTM03 8203 1908Pin configuration Colour1 Temperature signal (0.5 to 3.5 V relative to pin 3) Yellow2 Flow signal (0.5 to 3.5 V relative to pin 3) White3 GND (0 V) Green4 Power supply (+5V DC), PELV BrownTM03 8206 0807TM03 8149 0607VV4321PETemperature signalFlow signalElectrical connectorPin NoPipe systemFlow (l/min)Flow output signal (V)Temperature (°C)Temperature output signal (V)