Explanation:

Manganin wire pressure gauge is a device used for the measurement of high pressure with high accuracy. It is based on the principle of electrical resistance. Manganin wire is an alloy made up of copper, manganese, and nickel, which has a very low temperature coefficient of resistance. This means that its resistance does not change significantly with temperature.

Working of Manganin wire pressure gauge:

The Manganin wire pressure gauge consists of a wire made up of Manganin alloy, which is stretched between two fixed points. The wire is connected to an electrical circuit, and a current is passed through it. When pressure is applied to the wire, it gets strained, and its resistance changes. The change in resistance is directly proportional to the applied pressure, according to the piezoresistive effect.

Advantages of Manganin wire pressure gauge:

• High accuracy: Manganin wire pressure gauges can provide highly accurate measurements of pressure.

• High sensitivity: Manganin wire has a high sensitivity to pressure, which means that it can detect even small changes in pressure.

• Wide pressure range: Manganin wire pressure gauges can be used to measure pressure over a wide range, from a few millibars to several thousand bar.

• Good stability: Manganin wire pressure gauges have good long-term stability, which means that their accuracy remains constant over time.

Disadvantages of Manganin wire pressure gauge:

• Limited temperature range: Manganin wire pressure gauges have a limited temperature range, and they cannot be used at very high or very low temperatures.

• Fragile: Manganin wire is fragile, and it can break easily if subjected to excessive strain or pressure.

Conclusion:

Manganin wire pressure gauge is a highly accurate and sensitive device used for the measurement of high pressure. It has several advantages, such as high accuracy, high sensitivity, wide pressure range, and good stability. However, it also has some limitations, such as a limited temperature range and fragility.