Explain the principle of working of lvdt

Suggest a suitable sensor to measure the level of sulphuric acid in a storage tank. The sensor must give an electric signal as output.

Only the radar liquid level sensor can achieve a relatively high measurement accuracy. It has the characteristics of high continuous measurement accuracy, non-contact type, large measurement range, and good anti-corrosion performance. Sulfuric acid storage tanks are mainly used to store sulfuric acid produced in acid production. The accuracy of the liquid level of the sulfuric acid storage tank is directly related to the continuity of production. Because of the anti-corrosion and anti-disturbance problems, the traditional detection instruments are not suitable for detection.

10. 
    Bellows are more sensitive than capsules. State true or false and justify your answer.
    

False.
Capsules are more sensitive than bourdon tubes as well as bellows. They are use do not just for small spans but also where maximum correctness is required. The materials use for capsules are like to that of use for diaphragms.

11. 
    State the applications of pyroelectric sensors
    

The intensity of energy flux, measured in unit area, emitted from a body depends upon the body’s temperature and the nature of its surface. In general, a radiation heat exchange normally happens between hot and cold objects. Referring to the principles of radiation heat transfer, all bodies emit energy in the form of electromagnetic radiations. The majority of these radiations are within the infrared spectrum.

12. 
    ‘In thermistor sensors, resistance decreases in a very nonlinear manner with increase in temperature.’ State true or false and justify.
    

the resistance a thermistor decreases with increasing temperature. Thermistors cannot be used to measure high temperatures compared to RTDs. In fact, the maximum temperature of operation is sometimes only 100 or 200°C.

13.