1. LIQUID LEVEL MEASUREMENT Liquid level refers to the position or height of a liquid surface above a datum line. Level measurement are made to ascertain the quantity of the liquid held within a container Types Direct method- the varying level is the means to obtain the measurement Indirect method-variable changing with the liquid level is made to actuate the indicating mechanism

2. FLOAT AND TAPE LIQUID LEVEL GAUGE

3. SIGHT GLASS TYPE

4. HYDROSTATIC PR DEVICE

5. FLOAT AND SHAFT MECHANISM

6. SINGLE VESSEL AIR BUBBLER ARRANGEMENT

7. FLOAT OPERATED RHEOSTAT

8. CAPACITIVE LIQUID LEVEL SENSOR ( change of capacitance with respect to level of dielectric liquid)

9. GAMMA RAY LIQUID LEVEL SENSOR