Deck 13: Pressure Switches and Sensors

Question 1

Figure 13-9
In the accompanying figure, when pressure is applied to the diaphragm, the resistance of ____________________ changes proportionally to the applied pressure.

Answer 1

piezoresistors

Question 2

Most pressure switches provide a means for setting the pressure differential.

Answer 2

True

Question 3

____________________ are designed to produce an output voltage or current that is dependent on the amount of pressure being sensed.

Answer 3

Pressure sensors

Question 4

Pressure switches are used in many common and industrial applications.

Question 5

Figure 13-10
In the accompanying figure, the sensor contains an internal operations amplifier and can provide output voltage proportional to the ____________________.

Question 6

Contacts can be permitted to slowly close or open.

Question 7

The force sensor is unable to use silicon piezoresistive elements to determine the amount of pressure to the sensing element.

Question 8

What does the term ratiometric mean?

Question 9

Figure 13-5
In the accompanying figure, why must air space be maintained in the tank?

Question 10

Why are piezoresistive sensors very popular?

Question 11

Regardless of the method used to sense pressure, all pressure switches activate a set of ____________________.

Question 12

A diaphragm switch can be used to sense a much higher pressure than a metal bellows type switch.

Question 13

Why is the metal bellows type switch not as sensitive as the diaphragm type?

Question 14

What is differential pressure?

Question 15

A(n) ____________________ switch can sense small pressure changes at low pressure.