Question

Which of the following displacement sensors is known to have high sensitivity and a relatively larger measurement range?

• A. Strain gauge
• B. Capacitive sensor
• C. LVDT
• D. Piezoelectric sensor

Hint:

LVDTs are ideal for high-precision, linear displacement measurements. Their large measurement range and high sensitivity make them suitable for various industrial applications.

Answer 1

The Correct Option is C

The LVDT (Linear Variable Differential Transformer) is a displacement sensor known for its high sensitivity and large measurement range. It operates on the principle of electromagnetic induction, where the displacement of a ferromagnetic core inside a coil generates an output proportional to the displacement. The LVDT offers the following advantages:
- High sensitivity to displacement changes.
- A large linear measurement range (up to several centimeters or more).
- Good accuracy and precision. Other sensors like strain gauges, capacitive sensors, and piezoelectric sensors are generally used for smaller displacement measurements, with limited measurement ranges compared to LVDTs.
Therefore, the correct answer is (C) LVDT.