Level Tables Disadvantages Flashcards
Blocking distance
Ultrasonic, Radar, Guided Wave Radar
Turbulent surfaces
Ultrasonic, Radar, Guided Wave Radar
Minimum dielectric constant
Radar & Guided Wave Radar
Foam is an issue
Ultrasonic
Foam can be an issue
Radar & Capacitance Level Measurement
Vapors/gas above the liquid
Ultrasonic
Temperature difference between liquid and sensor
Ultrasonic
No vacuum (10 psia), no high pressures (44 psia)
Ultrasonic
Minimum density required
Ultrasonic
Must take into account tank design
Radar & Guided Wave Radar
Minimum dielectric constant
Radar & Guided Wave Radar
Heavy foam can be an issue
Guided Wave Radar
Many versions (conductor/insulator)
Capacitance Level Measurement
Probe coating (chemical compatibility)
Capacitance Level Measurement
Ground reference tube (non-metallic)
Capacitance Level Measurement