ONLINE ELECTRICAL ENGINEERING STUDY SITE

Water Meter

Water meter is a type of flow meter which is used to monitor the rate of flow of water through a pipe under consideration.

Types of Water Meters

Water meter can be of various types depending on the place in which they are deployed. For example:
  1. Gear Type Water Flow Meter

    Generally, all residential water meters are of positive displacement type. These can inturn be gear meter- (Figure 1) or oscillating piston or nutating disk meter-type. Here, the water is made to enter into a chamber from which it is let out only when the chamber fills-out. Gear type Water Flow Meter By doing so, one can estimate the rate of flow of water. These meters are used when the water flows at a moderately low rate.
  2. Single Jet Water Meter

    Velocity water meters, also known as internal capacity meters, are another category of water flow meters. In these meters, the rate of flow of water is determined by monitoring the speed at which the water flows. The subcategories under this type are jet (single- and multi-jet) and turbine flow meters.
    In single-jet meter, a single water-jet is impinged on the impeller while in the case of muti-jet meter, more than one jet is impinged on it. However in either cases, the rotational speed of the impeller gives a measure of flow rate of water. On the other hand, the turbine-kind of water meters use a turbine wheel whose speed of rotation determine the flow rate. single jet water meter Here it is to be noted that jet-type water meters are suitable for low flow rate measurements while turbine-type flow meters are suitable when flow rates are high. Hence when one has to accomplish both high as well as low flow rate measurements, better choice would be compound-type water meters, which combine both of these categories into a single device.
  3. Electromagnetic Water Meter

    Water meters can also measure the flow rate of water by using Faraday’s law of induction. Such meters are referred to as electromagnetic water meters (Figure 2) and are usually used when one needs to measure unclean or untreated or waste water. Here, the water flowing through the non-magnetic and non-electrical pipe induces a voltage in the meter’s magnetic field. The magnitude of this voltage will be proportional to the magnetic flux density and hence to the velocity of water flowing through the pipe, from which rate of flow of water can be determined. electromagnetic water meter
  4. Transit Time Type Water Meter

    Water meters can also be of ultrasonic type in which the rate of water flow is measured by using SONAR technique. Here the sound waves are sent through the flowing water to measure its velocity. Once velocity is known, one can determine the associated rate of flow of water as the cross-sectional area of the meter body would be known in prior. These kind of meters can either be of Doppler-type or of Transit-time type. transit time type water meter

Applications of Water Meter

  1. The water supply departments are the primary users of water meters. This department has these kind of meters installed in every building so as to track the amount of water consumed by them. The intention behind such an act is to bill them accordingly.
  2. Large infrastructures employ water meters to ensure proper water flow through each of their sub-structures, free from leakage and breaks.
  3. Industries which have cooling as one of the step in their process use water meter to monitor the rate at which the water flows.
  4. Water meters are also employed in agricultural industries and labs with an intention of analyzing different properties of water like its salinity, pH level, acidity, etc.
  5. Hydroelectric plants which generate electric power using water employ water meter to maintain a controlled amount of water flow through them.
  6. Water meters like that of turbine-type are used in fire protection systems.




Comments/Feedbacks






Closely Related Articles Air MeterMore Related Articles Digital PotentiometersWheatstone Bridge Circuit Theory and PrincipleKelvin Bridge Circuit | Kelvin Double BridgeMaxwell Bridge Inductance Capacitance BridgeAnderson′s Bridge | Advantages Disadvantages of Anderson′s BridgeHay′s Bridge Circuit Theory Phasor Diagram Advantages ApplicationsOwens Bridge Circuit and AdvantagesSchering Bridge Measurement of Capacitance using Schering BridgeDe Sauty BridgeHeaviside Bridge CircuitBlavier Test | Murray Loop Test | Varley Loop Test | Fisher Loop TestSensor | Types of SensorTemperature Sensor Temperature Measurement | Types of Temperature SensorVoltage SensorMeasurement of ResistanceFlow MeasurementFlow MeterDigital Frequency MeterElectrical Measuring Instruments | Types Accuracy Precision Resolution SpeedTransducer | Types of TransducerCathode Ray Oscilloscope | CROOhmmeter Working Principle of OhmmeterErrors in Measurement | Classification of ErrorsLissajous Patterns of CRO or Cathode Ray OscilloscopeFrequency Limitation of an OscilloscopePotentiometer Working Principle of PotentiometerPermanent Magnet Moving Coil Instrument or PMMC InstrumentCharacteristics of SensorsSignal GeneratorMoving Iron InstrumentInduction Type MetersMeasurement of Voltage Current and Frequency by OscilloscopeElectrostatic Type Instruments Construction Principle Torque EquationWhat is Low Power Factor Wattmeter ?Resistance Temperature Detector or RTD | Construction and Working PrincipleEnergy Meter with Lag Adjustment DevicesRectifier Type Instrument | Construction Principle of OperationThermistor Thermometer | Thermistor Temperature Sensor | Construction and Principle Digital Storage OscilloscopeElectrodynamometer Type WattmeterThermocouple type Instruments Construction Principle of OperationThermistor Definition Properties Construction Characteristics and Applications Double Beam OscilloscopeProtection of MetersMeasurement of Three Phase PowerBimetallic Strip ThermometerSampling OscilloscopeVarmeter | Single Phase and Polyphase VarmeterThermocouple Temperature MeasurementTemperature TransducersMegger | Working Principle Types History Uses of MeggerRadiation Pyrometer | Types Working PrincipleOptical Pyrometer | Construction and Working PrinciplePiezoelectric TransducerStrain GaugeWeston Type Frequency MeterPower Factor Meters | Electrodynamometer Type Power Factor MeterInductive TransducersPhase Sequence IndicatorAmmeter Working Principle and Types of AmmeterLinear Variable Differential Transformer LVDTOscillator TransducerDigital MultimeterInsulation Resistance Test and Polarization Index TestHartley OscillatorTan Delta Test |Loss Angle Test | Dissipation Factor TestColpitts OscillatorElectronic DC VoltmeterWorking Principle of Voltmeter and Types of VoltmeterClapp OscillatorRC Phase Shift OscillatorDigital Voltmeters Working Principle of Digital VoltmeterWien Bridge OscillatorMeasurement of Electrical EnergyGunn OscillatorEnergy Meter TestingCrystal OscillatorAC PotentiometerMonostable MultivibratorConstruction of AC Energy MeterBistable MultivibratorWatt Hour MeterCapacitance MeterWhat is an Oscillator?Vector Impedance MeterAstable MultivibratorHow to Use a Digital Multimeter?Voltage Controlled Oscillator | VCONew Articles Principle of Water Content Test of Insulating OilCollecting Oil Sample from Oil Immersed Electrical EquipmentCauses of Insulating Oil DeteriorationAcidity Test of Transformer Insulating OilMagnetic Flux