Most Accurate Humidity Sensor For Arduino

Humidity sensor dht22 the dht 22 also named as am2302 is a digital output relative humidity and temperature sensor.

Most accurate humidity sensor for arduino.

The dht11 is a digital temperature sensor that measures temperature and relative humidity. The dht22 am2302 sensor is able to measure temperatures from 40 to 125 c with an accuracy of 0 5 c and relative humidity levels from 0 to 100 with an accuracy of 2 5 at extremes to 10 and 90. Learn how to use temperature and humidity sensor with arduino how to connect dht11 or dht22 temperature and humidity sensor to arduino how to program arduino step by step. This makes them very easy to use with any microcontroller including the arduino.

The accuracy of measurement is the most important index of the humidity sensor. Earlier this week i wrote an article about how to use the dht22 am2302 temperature and humidity sensor with interrupts on an arduino. Sht15 is a precise humidity and temperature sensor designed to work in environments with greater fluctuation in humidity and temperature. At a price of 41 95 on robotshop the sensor comes fully calibrated and with 2 wire digital interface.

You can see that article here. In this tutorial i ll first go into a little background about humidity then i ll explain how the dht11 measures humidity. These sensors contain a chip that does analog to digital conversion and spit out a digital signal with the temperature and humidity. In this example you will learn how to use this sensor with arduino uno.

It uses a capacitive humidity sensor and a thermistor to measure the surrounding air and sends a digital signal on the data pin. The dht22 sensor also known as the am2302 reference and his little brother the dht11 are temperature and humidity sensors. Soil moisture sensor arduino compatible for plant uses oxidation proof infrared thermometer module cost efficient high sensitivity long range easy to be embedded non contact sht1x humidity and temperature sensor high end heavy duty sensor quick response high reliability and stability auto sleep low power consumption. After spending more time with the dht22 am2302 sensor i ve learned the humidity part of the sensor is not accurate at all.

In this tutorial you will learn how to get the temperature and humidity recorded by the sensor. For every percentage point increase it is a step or even a grade for the humidity sensor. Because different precisions are to be achieved their manufacturing costs vary greatly and their selling prices vary widely.