6. Tubular Type LG These are the simplest and most commonly used indicators of level. These are also called as Glass tube type level Gauges. Their lower cost and easy maintenance are the reason for their popularity.

8. These models consists of Red or black/white magnetic rollers equipped with small rod magnets which are rotated one after another at an angle of 180° by the magnetic field of the permanent magnet put inside the float. The rollers change from white to red on rising level and red to white on falling level Used for high temp and pr applications or if glass parts cannot be used for safety reasons Magnetic Level Indicator

11. Displacer Type LG Float Type Level Tx

14. Capacitive Level Tx Interface Capacitive Level Tx

16. Ultrasonic Level Transmitter

18. Indirect Level Measurement- DP Tx Δ P = h ρ g Δ P= Differential pressure h = height of liquid level ρ = specific gravity g = acceleration due to gravity