Electronic Pressure Switches - How They Work

The video tutorial explains pressure switches, their types, and applications. It covers mechanical and electronic designs, highlighting their components and functions. Pressure switches are used to control devices based on pressure levels, ensuring safety and efficiency in systems like refrigeration, air conditioning, and hydraulics. Mechanical switches use pistons and springs, while electronic ones use strain gauges and MOSFETs for precise control without moving parts.

What is the primary function of a pressure switch?

• To measure temperature changes

• To activate or deactivate devices based on pressure

• To monitor humidity levels

• To control the speed of a motor

In a mechanical pressure switch, what component resists the movement of the piston?

• A MOSFET

• An electrical connector

• A spring

• A diaphragm

What is a key advantage of electronic pressure switches over mechanical ones?

• They require more maintenance

• They are cheaper to produce

• They are larger in size

• They have no moving parts

What role does a strain gauge play in an electronic pressure switch?

• It provides a visual display

• It measures temperature

• It deforms under stress to measure pressure changes

• It acts as a power source

How does a MOSFET function in an electronic pressure switch?

• It blocks current flow until a specified voltage is applied

• It acts as a mechanical switch

• It provides a path for electricity across a surface

• It measures pressure directly

What happens to the resistance of a strain gauge when it is deformed?

• It fluctuates randomly

• It increases

• It decreases

• It remains constant

In a Wheatstone bridge, what is measured between two points when the voltage is the same?

• 15 volts

• 0 volts

• 10 volts

• 5 volts