Rain Sensor Working and Its ApplicationsNowadays, conserving water as well as its proper usage is essential in everyone’s life. Here is a sensor namely rain sensor which is used to detect the rain and generate an alarm. So, we can conserve water to use it later for different purposes. There are several methods available for conserving water like harvesting, etc Using this method we can increase the level of underground water. These sensors are mainly used in the field like automation, irrigation, automobiles, communication, etc. This article discusses a simple as well as reliable sensor module which can be available at low cost in the market.What is a Rain Sensor?A rain sensor is one kind of switching device which is used to detect the rainfall. It works like a switch and the working principle of this sensor is, whenever there is rain, the switch will be normally closed. Rain Sensor ModuleThe rain sensor module/board is shown below. Basically, this board includes nickel coated lines and it works on the resistance principle. This sensor module permits to gauge moisture through analog output pins & it gives a digital output while moisture threshold surpasses.rain-sensor-moduleThis module is similar to the LM393 IC because it includes the electronic module as well as a PCB. Here PCB is used to collect the raindrops. When the rain falls on the board, then it creates a parallel resistance path to calculate through the operational amplifier.This sensor is a resistive dipole, and based on the moisture only it shows the resistance. For example, it shows more resistance when it is dry and shows less resistance when it is wet.Pin ConfigurationThe pin configuration of this sensor is shown below. This sensor includes four pins which include the following. Pin1 (VCC): It is a 5V DC pinPin2 (GND): it is a GND (ground) pinPin3 (DO): It is a low/ high output pinPin4 (AO): It is an analog output pinSpecificationsThe specifications of the rain sensor include the following.rain-sensorThis sensor module uses good quality of double-sided material.Anti-conductivity & oxidation with long time useThe area of this sensor includes 5cm x 4cm and can be built with a nickel plate on the sideThe sensitivity can be adjusted by a potentiometerThe required voltage is 5VThe size of the small PCB is 3.2cm x 1.4cmFor easy installation, it uses bolt holesIt uses an LM393 comparator with wide voltageThe output of the comparator is a clean waveform and driving capacity is above 15mAApplicationsThe applications of rain sensor include the following.This sensor is used as a water preservation device and this is connected to the irrigation system to shut down the system in the event of rainfall.This sensor is used to guard the internal parts of an automobile against the rainfall as well as to support the regular windscreen wiper’s mode.This sensor is used in specialized satellite communications aerials for activating a rain blower over the opening of the aerial feed, to get rid of water droplets from the mylar wrap to keep pressurized as well as dry air within the waveguides.Thus, this is all about the rain sensor. From the above information finally, we can conclude that this sensor is used to detect the rain and generate buzzer sound to take necessary action in further. Here is a question for you, what is the function of LM393 comparator? Share This Post: Facebook Twitter Google+ LinkedIn Pinterest Post navigation ‹ Previous Soil Moisture Sensor Working and ApplicationsNext › DHT11 Sensor and Its Working Related Content What is Sensor Calibration- Definition and It’s Application What is a Distance Sensor Working and Its Applications What is a IMX586 Sensor : Working and Its Features What is Weight Sensor Working and Its SpecificationsAdd Comment Cancel replyComment:Name * Email * Website