Level indicators/switches are used to provide continues reading of fluids in containers, tanks, wells, drilling holes, water reservoirs, waste water systems……etc.
Also it signals minimum and/or maximum level of different fluids in tanks.
Level indicators:
Mechanical, pneumatic, electro-pneumatic, hydrostatic, capacitance, ultrasonic, magnetostrictive and guided-pulse.
Level switches:
Float, paddle, conductivity, capacitance and vibration.