Classification of sensors (or transducers) based on applications


Displacement, Position and Proximity Sensors

  1. Resistive Element or Potentiometer
  2. Capacitive Elements
  3. Strain Gauged Element
  4. Inductive Proximity Sensors
  5. Eddy Current Proximity Sensors
  6. Differential Transformers
  7. Optical Encoders
  8. Hall Effect Sensors
  9. Pneumatic Sensors
  10. Proximity Switches
  11. Rotary Encoders

Temperature Sensors

  1. Thermistors
  2. Thermocouple
  3. Bimetallic Strips
  4. Resistance Temperature Detectors
  5. Thermostat

Light Sensors

  1. Photo Diode
  2. Phototransistor
  3. Light Dependent Resistor

Velocity and Motion

  1. Pyroelectric Sensors
  2. Tach generator
  3. Encoders (rotary and linear)

Fluid Pressure

  1. Diaphragm Pressure Gauge
  2. Tactile Sensor
  3. Piezoelectric Sensors
  4. Capsules, Bellows, Pressure Tubes

Liquid Flow and Level

  1. Turbine Meter
  2. Orifice Plate and Venturi Tube
  3. Differential Pressure Transmitter (DPT)

IR Sensor

  1. Infrared Transmitter and Receiver Pair

Force

  1. Strain Gauge
  2. Load Cell
  3. Cantilever beam

Touch Sensors

  1. Resistive Touch Sensor
  2. Capacitive Touch Sensors

UV Sensors

  1. Ultraviolet Light Detector
  2. Photo Stability Sensors
  3. UV Photo Tubes
  4. Germicidal UV Detectors

Other types of sensors:

  1. Accelerometers
  2. Gyroscope
  3. Gas detectors

Comments

Post a Comment

Popular posts from this blog

Washing Machine: An example of mechatronics system

Image
The washing machine is an example of a  sequential control system.  A system operating with sequential control is one where a number of preset operations are performed in sequence.  The control may be implemented as  event-based,  where the next action cannot be performed until the previous action is completed.  Another mode of sequential control is termed  "time-based",  where the operations are sequenced with respect to time. Example: An example of a time-based sequential control system is shown in the following Figure 1. The pump (fill valve) is switched ON for a particular time to fill enough water into the tank to fill it to approximately the correct level. Following this, the pump is switched OFF.   Figure 1: Time-based sequential control Among these two modes,  event-based control  is intrinsically  more reliable  than time-based control.  An example of an event-based sequential control system is a washing machine. In this system, a number of operations or events h
Read more

Proximity sensors

Image
Proximity sensors Proximity sensors are pilot devices used to detect the presence of an object without making any physical contact and are widely used in industrial automation for the detection of objects at a position. Proximity sensors are a non-contact type of solid-state electronic devices and are normally of eddy current type or inductive, capacitive or photoelectric proximity sensor. Inductive proximity sensor An inductive proximity sensor is a non-contact proximity sensor that can detect ferrous objects that contain iron, ideally mild steel thicker than one millimeter. Construction: An inductive proximity sensor is a non-contact proximity sensor that detects ferrous objects that contain iron, ideally mild steel thicker than one millimeter.  An inductive proximity sensor consists of four major components: a ferrite core with coils , an oscillator , a detector or signal conditioner , and an output amplifier all packed in a compact housing.   The oscillator creates a symmetrical
Read more

Piezoelectric Pressure Sensor

Image
Piezoelectric Pressure Sensor A piezoelectric sensor is a device that uses the piezoelectric effect to measure changes in pressure, force, strain or temperature by converting them to an electrical charge.  The word piezo is derived from the Greek word piezein which means “Press” or “Stress”. The piezoelectric effect is observed in various materials available in different forms such as crystalline, ceramics, lead-free piezoceramics, semiconductors, and polymers. The  Lead zirconate titanate and quartz crystal are the common types of piezoelectric materials used in piezoelectric pressure sensors.  The piezoelectric material can be referred to as a bidirectional transducer as it generates an internal voltage resulting from an applied pressure or mechanical force due to piezoelectric the effect, contrarily,  it can also generate internal pressure or mechanical strain when an electric field is applied due to the inverse piezoelectric effect.  Construction: The piezoelectric pressure senso
Read more