HUMIDITY SENSOR

                                                       A humidity sensor (or hygrometer) senses, measures and reports the relative humidity in the air. It therefore measures both moisture and air temperature. Relative humidity is the ratio of actual moisture in the air to the highest amount of moisture that can be held at that air temperature. We can interface humidity sensor with Arduino to measure the humidity in air.

Application:

• Used in industries to maintain a optimum humidity level.
• Climate control.
• Humidity monitoring.

Sample Project With Arduino:

                               In this we going to measure the level of humidity in the air by using the DHT 11 or humidity sensor.

Materials required:

• Humidity sensor
• Arduino UNO
• Jumper Wires

Circuit:

Code:

#include <DHT.h>

#define dht_apin A0

Dht DHT;

void setup()

{

Serial.begin(9600);

delay(500);

Serial.println(“Humidity and Temperature Sensor \n\n”);

delay(1000);

}

void loop()

{

DHT.read11(dht_apin);

Serial.print(“Current Humidity = “);

Serial.print(DHR.humidity);

Serial.print(“%   “);

Serial.print(“temperature  = “);

Serial.print(DHT.temperature);

Serial.println(“C “)’

delay(5000);

}