Please enable JavaScript.

Coggle requires JavaScript to display documents.

FLOW MEASUREMENT & MEASUREMENT OF LIQUID LEVEL - Coggle Diagram

- - - - Dip-stick Method
        
        Determining the liquid level by dipping a graduated rod in a
        liquid.
        
        Application
        
        Level of oil in car engine
        
        Level of oil in petrol station
        
        Advantages
        
        Economic
        
        Drawbacks
        
        Not accurate (moving fluid),
        
        not possible for real
        
        time observation.
      - Sight glass method
        
        Advantages
        
        Simple & direct (clean & coloured liquids
        
        Drawbacks
        
        Not suitable for dirty, viscous & corrosive liquids.
        
        Manually recording needed.
        
        Determining the liquid level by a graduated glass tube mounted on the side of the liquid containing vessel for providing a visual indication of the liquid level
      - Hooke gauge
        
        Determining the liquid level in a large tank for accurate measure of a very small changes. A small change in a large tank would mean large volumetric changes
        
        Advantages
        
        Accuracy up to +- 0.1mm
        
        Drawbacks
        
        Manually operated and no automatic reading
      - Float gauge
        
        Determining the liquid level that always follow the varying liquid level. The float usually used are hollow metal spheres,
        
        Advantages
        
        Capable of giving continuous, direct liquid level
        measurement.
        
        Drawbacks
        
        Proper correction is required if there is a change in
        the liquid density.
  - - - •Used for non-contact level sensing of highly viscous
        liquids, as well as bulk solids.
      - •They are also widely used in water treatment applications for pump control and open channel flow measurement
      - •Sound waves are directed towards the free surface
        of the liquid from an ultrasound transmitter.
      - •These waves get reflected from the surface of the
        liquid and are received by the receiver.
    - - • To provide automatic control, thus, machines, electronics or
        computer replace the operations of the human.
      - An instrument called a sensor is added that is able to measure the value of the level and convert it into a proportional signal,s