Working Principles of Temperature and Humidity Sensors

The working principles of temperature and humidity sensors are based on different physical effects. Temperature sensors typically utilize the properties of thermistors, whose resistance changes with temperature. For example, some products use NTC thermistors, which are highly sensitive and have a fast response time. Humidity sensors may use capacitive or resistive principles, reflecting changes in ambient humidity by measuring changes in capacitance or resistance after moisture absorption. Temperature and humidity sensors available in stores, such as those from the Honeywell brand, offer high precision (linearity ≤ ±0.25% FS, repeatability ≤ ±0.25% FS) and stable performance, making them suitable for a variety of environmental monitoring applications. These sensors can accurately and in real time reflect ambient temperature and humidity conditions, providing reliable data support for automatic control systems.