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submersible or land use
colour matching tests
When it comes to measuring the gas in ppm the analog pin has to be used
The devices provide accuracy to 1/2LSB without the need for thin-filmresistors or laser trimming
a carbon-composition resistor can have 4 to 6 bands
Temperature Humidity Sensor Module (DHT11) soil moisture submersible or land useIntroduction : Temperature Humidity Sensor Module (DHT11) can measure temperature from 0C to 50C with 2. 0C accuracy, and humidity from 20 to 80% with 5% accuracy. You can get new data from it once every second. This sensor is pre calibrated and dont require extra components so you can start measuring relative humidity and temperature right away. Connections : Features: Operating Voltage: 3. 5V to 5. 5V. Output: Digital. Temperature Range: 0C to 50C.