Sensors Part 2: Analog Sensors Measurement

To measure various physical quantities that vary over a range.

Accuracy refers to how closely the sensor indicates the true quantity being measured.

Resolution is the smallest change that can be observed by the sensor.

<p>Repeatability indicates how closely the sensor can measure the same quantity again.</p> Signup and view all the answers

<p>Precision refers to how closely the output of one sensor matches the others in the group.</p> Signup and view all the answers

<p>Thermocouple, RTD, Thermistor, and IC (Semiconductor) Temperature Sensors.</p> Signup and view all the answers

<p>Two dissimilar metal wires joined at one or both ends produce a small voltage proportional to the temperature difference.</p> Signup and view all the answers

<p>An RTD is basically a precision resistor that changes its electrical resistivity with temperature.</p> Signup and view all the answers

<p>The resistance of semiconductors decreases as temperature increases, leading to a precise and stable output.</p> Signup and view all the answers

<p>Used to measure force, pressure, and acceleration.</p> Signup and view all the answers

<p>It is an electrical transformer with three windings and a movable core. The output voltage is proportional to the position of the core.</p> Signup and view all the answers

<p>It uses the transformer principle with two stationary windings 90° out of phase and a rotor winding whose phase is proportional to the angle of the rotor.</p> Signup and view all the answers

<p>Limit load current, shield wiring from noise, match sinking with sourcing components, mount horizontally if possible, avoid interference from mounting or other sensors, and do not over-tighten fasteners.</p> Signup and view all the answers

<p>Voltage (V) and current (I).</p> Signup and view all the answers

<p>A thermistor's resistance changes with temperature, typically decreasing as temperature increases.</p> Signup and view all the answers

<p>A Hall effect sensor is used to measure magnetic fields and can be used to detect linear displacement, rotary displacement, or velocity.</p> Signup and view all the answers

<p>A potentiometer has a very linear output as its resistance changes with position.</p> Signup and view all the answers

<p>Strain gauges are sensitive to temperature changes, which can affect their resistance and introduce errors in force or pressure measurements.</p> Signup and view all the answers