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After midterm week 4 - Coggle Diagram

- - - - Using electromagnetic induction
      - Motional EMF = Blv
      - Q=k*(πdε/4B)
    - - Doppler flowmeters
        
        Q= cA∆f/(2fcos(θ))
        
        c=√(B/ρ)
        
        ∆f= (2vfcos(θ))/c
      - Transit-time
        flowmeters
        
        Q=k (tup- tdown)/(tup*tdown )
    - - Using when the fluid flow pass through the stationary object and occuring the vortex
      - λS = d ; λ ≈ d/0.7
      - f = Qk
    - - Using technology of Laser-Two-Focus (L2F)
      - Suitable for flare process
      - Relating to Scintillation
    - - Use free-spinning to measure fluid velocity
      - Sensitive to swirl
      - Turn down ratio
      - Rangeability
      - f = Qk
  - - - Meter Tubes
        
        Glass Meter Tubes
        
        Metal Meter Tubes
        
        Plastic-Tube rotameters
      - Float Type
        
        Low pressure drop floats
        
        Pole guided floats
        
        Floats with tail guides
        
        Floats Type "BL"
        
        Ball floats
    - - Adjust flow of small gas or liquid purge streams
      - Protect instrument from contacting hot & corrosive
      - Protect pressure drop from plugging
      - Protect cleanliness of optical devices
      - Protect electrical devices from igniting upon contact with combustibles
      - Widely used flowmeter
  - - - Work by shaking one or more tubes carrying the flowing fluid, then precisely measuring the frequency and phase of that shaking
    - - Hot-wire anemometer used to measure air speed
- - - - Output signal
      - Electrical connectors
      - Standardized process connections
    - - High-end transmitter that additional software with user-programmable functionality
    - - Define electrical output
      - Generic sensing functionality
      - Define pressure port
  - - - Consider seal
      - Consider thread
    - - Consider the lower limit and upper limit
      - Consider at whether the values are in units of absolute or gage pressure
    - - Ratiometric
      - Digital output signal
      - Standard analog
      - Digital communication modulated on an analog output signal
    - - The type of connector affect to instrument
    - - Hazardous area
      - Harsh environmental condition
      - Heavy vibration
      - Chemical attack