1. Temperature sensor
Temperature sensors are used to detect temperature and heat energy and convert it into an electrical signal (transmitted in the form of voltage or current).
We actually have the following types of temperature sensors to use.
1. Thermometer
2. Thermocouples
3. Resistance temperature detector
4. Thermistor temperature sensor
5. Semiconductor temperature sensor
6. Vibrating wire temperature sensor
Temperature sensors are now commonly used in computers, refrigerators, automobiles, medical equipment, cookware and other equipment.
2. Pressure sensor
A pressure sensor can also be referred to as a pressure transmitter or a manometer.
The pressure sensor detects the pressure of air, gas, water and provides an electrical signal to the controller.
It is divided into different categories according to different uses and more features:
1. Vacuum pressure sensor
2. Absolute pressure sensor
3. Gauge pressure sensor
4. Differential pressure sensor
Pressure sensors are used in many systems, common being pneumatic, hydraulic, vacuum systems, etc.
3. Touch sensor
Touch sensors are called tactile sensors. It is an electronic sensor that detects and records human touch.
Capacitive touch sensors and resistive touch sensors are the most commonly used touch sensors nowadays.
It is used in many industrial applications, such as: switching lights, air conditioning (AC) remote control, door opening/closing operation, elevators, robots, smartphones, etc.
Actually, there is an unpopular knowledge: oximeters are one of the best examples of touch sensors that can detect the amount of oxygen in the human body.
In this epidemic, the demand for oximeters is actually very large. It is relatively easy to operate, even at home. You can easily be able to buy an oximeter online.
Fourth, the image sensor
An image sensor is an electronic device used to detect image pixels and provide information to a display device.
Image sensors are available in both analog and digital versions. In general, there are two main types of electronic image sensors.
1. Charge-coupled devices
2. Active pixel sensor
Image sensors are used for digital cameras, closed-circuit television (CCTV), medical imaging equipment, thermal imaging equipment, radar, sonar, etc.
5. Motion sensor
Motion sensors measure and record physical activity or movement. It is divided into the following types.
1. Active motion sensor
2. Passive motion sensor
3. Tomographic motion sensor
4. Gesture motion sensor
Motion sensors are used in home security, automatic door operation, microwave, robotics, ultrasonic, gesture detection, and other fields.
6. Light sensor
A light sensor is an optoelectronic device that detects and converts the brightness or luminescence of light or photons into an electrical signal.
There are three main types of light sensors that are commonly used today.
1. Photoresistor or Photoresistor (LDR)
2. Photodiode
3. Phototransistors
It is widely used in solar system automobiles, the agricultural sector (sprinkler systems) and electronic project equipment such as Arduino.
7. Vibration sensor
Vibration sensors may not be heard much, in fact, vibration sensors are also called piezoelectric sensors.
Vibration sensors are capable of detecting and recording any movement or activity. It provides data or signals to connected machines or systems.
If there is any hazardous activity, the sensor helps to send a confirmation message.
Vibration sensors are needed in our oil & gas, food & beverage, mining, metalworking, paper, wind power, power generation and other industries.
8. Humidity sensor
Humidity sensors are also known as hygrometers;
For detecting moisture in the air and soil, a humidity sensor is necessary. It is mainly used in air conditioning systems.
9. Proximity sensor
Proximity sensors can easily detect nearby objects without any direct contact. It is divided into different types:
1. Capacitive proximity sensor
2. Inductive proximity sensor
It is widely used in smartphones, tablets, machines, robotic systems, roller coasters, etc.
10. Color sensor
A color sensor is actually a photoelectric sensor.
It helps to perceive the color of an object and recognize the color markings. This sensor uses the RGB (red, green, blue) color scale.
Color sensors are used extensively in our painting and printing, cosmetics, textiles, medical diagnostics, computer color monitors, and process control.
11. Radiation sensors
A radiation sensor is an electronic instrument that can sense and measure radiation particles such as α, β, γ, neutrons, X-rays, etc.
In addition, it can also sense electromagnetic radiation such as waves, cosmic radiation (sunlight).
There are three different types of radiation sensors.
1. Inflatable radiation sensor
2. Scintillation radiation sensor
3. Solid-state radiation sensor
This sensor is used in nuclear energy, medical imaging patterns, and environmental radioactivity monitoring, so there are not many opportunities to see this sensor directly in our lives, but it is actually very relevant.
12. Liquid level sensor
The main function of a level sensor is to measure the level or height of different materials such as solids, liquids and gases.
It is divided into the following types:
1. Laser level sensor
2. Float sensor
3. Capacitive liquid level sensor
4. Resistance level sensor
5. Ultrasonic liquid level sensor
6. Hydrostatic level sensor
7. Optical level sensor
8. Electromagnetic liquid level sensor
Liquid level sensors are widely used in ships, containers, water tanks, fuel tanks, etc., for water level checking.
13. Position sensor
Position sensors determine displacement and position (e.g., linear and rotational).
Basically, position sensors are divided into the following types.
1. Optical position sensor
2. Linear position sensor
3. Rotary position sensor
4. Inductive position sensor
5. Capacitive position sensor
6. Optical fiber position sensor
7. Ultrasonic position sensor
For example, a potentiometer contains a rotary position sensor that changes with angular movement,
Position sensors are actually many in domestic and industrial applications, such as door closing/opening, valve monitoring, motor control, throttle valves for controlling engine fuel or power flow.
14. Smoke or gas sensors
Gas sensors are used to detect different types of gases, toxic or explosive gases, smoke in the air. Some of these sensors are also capable of measuring gas concentrations.
Gas or smoke sensors can be divided into three main categories:
1. Optical smoke sensor
2. Ionized smoke sensor
3. Laser smoke sensor
Smoke sensors are used in factories, industries, buildings, ships, aircraft, etc.
15. Flame sensor
Flame sensors can easily detect fires or flames from nearby materials. These detected signals are transmitted to the connected control device.
It is used in alarm systems in industrial areas, gas plants, fire extinguishing systems and fire detector projects based on Arduino-based designs.
16. Leakage sensor
Leak sensors are used in closed containers or vacuum chambers to detect water leaks, liquid leaks, air leaks, etc.
It is divided into two main parts by job role:
1. Point leakage sensor
2. Flow leakage sensor
XVII. Accelerometer
An accelerometer is an instrument that measures the acceleration or velocity of motion.
It is widely used in gesture-controlled robots, aircraft and missile navigation systems, process control systems, vehicle acceleration, and other rotating electronic devices such as turbines, drums, fans, compressors, pumps, etc.
18. Tilt sensor
The tilt sensor detects and changes the angular motion, angular slope, angular motion, axis of the datum.
It is mainly used for the monitoring of angle and automatic rotation operation of mobile phones, tablets, handheld game consoles, boats, vehicles, airplanes, etc.
19. Marking sensors
The marker sensor works as a photoelectric sensor. It is used to sense the color mark on an object.
Marking sensors are widely used in the printing and packaging industries.
20. Flow sensor or float sensor
Flow sensors measure and detect almost all process fluids. The detected data will be provided to the controller system.
It is used in industrial fields, power generation instruments, power plants, etc.
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