Main Features:<br />GND: Negative electrode<br />DO: TTL swith signal output<br />AO: Analog signal output<br />Suitable for all kinds of wheather monitoring<br />Can be converted to digital signal and then output by OA<br /><br />    Specifications<br />General<br />	 Type: Rain drop sensor， Relay module borad                                                	<br />Connectivity<br />	 Ports: AO， VCC， DO                                                	<br />Electronic Components<br />	 Input Voltage: 3-5V                                                  <br />                        Operating Voltage: 3.3-5V                                                  <br />                        Signaling Type: TTL                                                	<br />Weight and Size<br />	 Product Weight: 6.8 g                                                  <br />                        Package Weight: 0.050 kg                                                  <br />                        Product Size(L x W x H): 6.0 x 3.9 x 0.7 cm/ 2.4 x 1.5 x 0.3 inches                                                  <br />                        Package Size(L x W x H): 7.0 x 5.0 x 2.0 cm                                                	<br />Package Contents<br />	 Package Contents: 1 x Rain Drop Sensor， 1 x Relay Module Board， 1 x Control Board， 2 x Cable                                                	<br /><br /><br /><br />                                                <br />