Explain working of pressure switch with suitable diagram. State the function of differential setting in pressure switch.

Explain working of pressure switch with suitable diagram. State the function of differential setting in pressure switch.
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Pressure switch is used to turn on/off when specified pressure is reached. It consists of a pressure port and bellows. When pressure is applied, bellows expand and actuate the snap action switch against return spring force. Differential setting allows setting of cut-in and cut- out pressure setting i.e. hysteresis setting. This prevents chattering of pressure switch contacts.

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