A manometer is an instrument used for measuring the pressure acting on a column of fluid, which consists of a U-shaped tube of liquid in which the difference in pressures acting in the two arms of the tube causes the liquid to reach different heights in the two arms. Which of the following is NOT a limitation of the manometer?
1. Need for levelling
2. Large and bulky size
3. Difficulty in construction (Ans)
4. No over-range protection