This section provides overview, applications, and principles of humidity and temperature sensors. Also, please take a look at the list of 13 humidity and temperature sensor manufacturers and their company rankings.
A humidity and temperature sensor is a device used to measure temperature and humidity and consists of a temperature sensor and a humidity sensor.
The following explains the principle of each type of resistance thermometer (RTD), linear resistor, and thermistor.
Humidity sensors are broadly classified into two types: resistance change type and capacitance change type.
Humidity sensors express measurement results as a percentage of water vapor content when the saturated water vapor content is 100%. Due to its temperature-dependent characteristics, it is called relative humidity. For this reason, they are often used in conjunction with temperature sensors and are collectively referred to as humidity and temperature sensors.
In addition to differences in measurement methods and configurations, there are two types of humidity and temperature sensors: sensor element only and IC type.
The IC type integrates the sensor element and measurement circuits such as A/D conversion into a single chip. When using a single sensor element, it is necessary to design the peripheral circuits according to the application, which is time-consuming and costly, but the integrated IC type can be used easily.
Also, when mounted on a board, the area can be reduced, resulting in miniaturization, low power consumption, and low cost.
Not only PCs and smartphones but also various devices are now connected to the Internet and can be linked together. This is known as the Internet of Things (IoT), and it is used for various services by enabling devices to exchange information, operate remotely, and collect data.
In particular, sensors play an important role in services and systems for remotely monitoring conditions and detecting abnormalities, and various types of sensors combined with wireless communication methods such as WiFi and Bluetooth, known as IoT sensors, have appeared.
Wireless temperature and humidity sensors are one of these sensors, and by utilizing these sensors, systems can be built to check and monitor temperature and humidity in remote locations.
They are used for temperature/humidity control and abnormality detection in places where people are not always present or visible, such as data centers, production lines, cooling facilities, warehouses, and greenhouses.
In addition, sensors are used in a variety of applications, such as window and door open/close detection, human and animal movement detection, home security services linked to home appliances, and monitoring services for the elderly.
*Including some distributors, etc.
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