How to choose a temperature and humidity sensor? What are the characteristics of temperature and hum

Principle analysis: temperature and humidity sensor is a sensor to detect temperature and humidity, and the humidity referred to by patency refers to relative humidity, that is, the ratio of absolute humidity at the current temperature to the saturation humidity at the current temperature, which is called relative humidity. It can be seen that the measurement of humidity is inseparable from temperature, and if there is an error in temperature measurement, it will affect humidity.

Therefore, when selecting a temperature and humidity sensor, special attention should be paid to the temperature measurement accuracy of the sensor.

About condensation: Condensation occurs when the humidity reaches 100%, and condensation is a natural phenomenon that cannot be stopped. However, condensation produces water droplets that adhere to the sensor circuit board, and current flows through the circuit board, so electrophoresis occurs, corroding the circuit board and causing damage to the sensor.

Therefore, in high humidity occasions, the temperature and humidity sensor must be selected with waterproof function, the detection method is very simple, the sensor is charged and soaked in water, simulating the condensation environment, soaked for 24 hours and then taken out to dry, if the sensor is working normally, the sensor is waterproof.

About accuracy: Many people like to use wet and dry bulbs to measure humidity, in fact, the error of wet and dry bulbs is relatively large, about 5 7%rh. With the development of electronic technology, the accuracy of electronic temperature and humidity sensors can reach 3%RH, and the accuracy of high-precision sensors can reach 1%RH, such as the high-precision sensor of Sensirion in Switzerland.

The temperature and humidity sensor is used to measure the temperature (unit: ) and humidity (unit: %rh) of various environments, and is displayed in digital form on the local host display, which can be widely used in various environments for temperature and humidity measurement.

It can be used in all walks of life, such as environmental monitoring, pharmaceutical and chemical industry, communication room, HVAC HVAC, clean workshop, telecom base station, intelligent building, book Hekai, archives, textile printing and dyeing, food processing, industrial automation, supermarket, production workshop, industrial automation, cave, cold storage, fresh storage, sterilization cabinet, biological culture, etc.

Moisture-proof, mildew-proof, anti-corrosion, and explosion-proof are the primary contents of local operations such as warehouses and factories, and are the primary goals to measure the quality of local management such as warehouses and factories.

Temperature and humidity sensors.

Temperature and humidity sensor is a type of sensor, which is a device used to detect and manage temperature and humidity in the first chain.

As a device that can sense temperature and humidity and convert it into output signals, temperature and humidity sensors are widely used in museums, libraries, archives, warehouses, production workshops, industrial automation, HVAC, pharmaceutical and chemical industries, communication rooms, environmental monitoring, clean workshops, intelligent buildings, intelligent schools, telecommunications base stations and other places.