Temperature and humidity sensor is one of the sensors. Temperature and humidity sensor is to pass the temperature and humidity in the air through a certain detection device, measure the temperature and humidity, and convert it into an electrical signal or other required form of information output according to a certain law to meet the needs of users.
Temperature in the temperature and humidity sensor is a physical quantity that indicates the degree of heat and cold of the object, and microscopically, it is the intensity of the thermal movement of the molecules of the object.
The humidity in the temperature and humidity sensor indicates the physical quantity of how dry the atmosphere is. The less water vapor contained in a certain volume of air at a certain temperature, the drier the air; The more water vapor, the more humid the air. The degree of dryness and wetness of air is called “humidity”.
Precautions for temperature and humidity sensor selection:
Selection of measuring range of temperature and humidity sensor: Like measuring weight and temperature, selecting a humidity sensor must first determine the measurement range. In addition to meteorological and scientific research departments, temperature and humidity measurement and control generally do not require full humidity range (0-100%RH) measurement.
The choice of temperature and humidity sensor accuracy: measurement accuracy is the most important indicator of humidity sensor, and every increase in one percentage point is a step up for the temperature and humidity sensor, or even a grade. Because to achieve different precision, the manufacturing cost varies greatly, and the selling price is also very different. Therefore, users must be tailor-made, and should not blindly pursue “high, precise and sharp”. If a humidity sensor is used at different temperatures, the indication value also considers the influence of temperature drift.
The future temperature and humidity sensor market has broad prospects, especially in the fields of consumer electronics and the Internet of Things. Small size, low power consumption, low cost, high integration of temperature and humidity sensor products, will be more popularized and applied.
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