Sensors are now slowly but surely becoming a part of our everyday lives and are being embedded in a lot of the goods and products which we buy and sometimes use.
Acoustic sensors: These sensors pick up and record vibrations in the environment, and as such can also record voices and record people talking or singing. A good example of this is a microphone, which is an IoT vibration sensor that is sold separately and mini-microphones are also embedded in devices like our laptops and phones, which makes it possible for us to make and receive phone calls and also converse over the phone. Other devices like the Amazon Alexa device also have acoustic sensors in the form of microphones to enable us to communicate with them.
Visual sensors: Visual sensors pick up, record, and transmit visual stimuli in the form of pictures, video, and color and are important in devices like cameras whose purpose is to capture pictures. They are also found in smartphones that possess cameras which can also be used to record videos and take pictures.
Weather sensors：They are sensors that are meant to detect temperature and other changes in weather. It is used to determine how hot or how cold an object or place is and an application of this is in thermometers in hospitals which are used to take the temperature of a patient.
Positioning sensors: These kinds of sensors are important for direction, location, and navigation. They are made to indicate and pinpoint the location of an object or objects in relation to another object. A good example and application of this are in GPS location which is found in smartphones, and in which can be useful for navigation.
Wearable devices: Like heart rate and pulse rate monitors also contain and make use of sensors that can take readings and measurements of things like heart rate, pulse rate to enable people to keep an eye and monitor their vital signs. It is especially useful for elder people or people with illnesses that warrant constant monitoring of their vital signs.
Gas sensors: These help to detect the presence of poisonous and toxic gases, as well as to detect changes in the atmosphere such as air quality detected by an IoT air quality sensor. An application of this is in homes that have carbon dioxide or carbon monoxide detectors.