Sensors and Instrumentations - Chapter 1 Introduction

A sensing unit can consist of additional components such as filters, amplifiers, modulators, and other signal conditioners. True or False?

The actuating unit consists of an actuator and optionally a power supply and a coupling mechanism. True or False?

Transducers are devices used to transform one kind of energy to another. True or False?

An actuator is a transducer that converts a measurable quantity to an electrical voltage or an electrical current. True or False?

An instrument refers to an actuator together with some of its associated electronics. True or False?

A sensor is a converter of generally electrical effects into electrical signals. True or False?

Passive sensors require external power for their operation.

Analog sensors produce binary output signals.

Digital sensors incorporate active electronic components such as amplifiers and ICs.

Eyes detect heat energy as a form of input.

Active sensors directly generate an electric signal in response to an external stimulus.

A thermistor changes its resistance when cooled.

Passive sensors incorporate active electronic components like amplifiers and ICs.

Human skin detects sound energy as a form of input.

Infrared sensors are examples of mechanical quantity sensors.

Sensors that detect physical quantities are classified as digital sensors.