Main Features:<br />Main chip: LM393? ZYMQ-2 gas sensor<br />With signal output indication<br />TTL output effective signal: Low level (the LED light on? can connects microcontroller directly)<br />0~5V analog output voltage? the higher the concentration the higher the voltage<br />Quick response and resume? long life and reliable stability<br />High sensitive with liquid gas? natural gas? coal gas? etc<br /><br />    Specifications<br />General<br />	 Type: Smoke sensor module                                                  <br />                        Compatibility: Ardunio                                                	<br />Connectivity<br />	 Connectors: 3-Pin                                                	<br />Electronic Components<br />	 Operating Voltage: 5V                                                  <br />                        Signaling Type: TTL? I2C                                                	<br />Weight and Size<br />	 Product Weight: 0.009 kg                                                  <br />                        Package Weight: 0.050 kg                                                  <br />                        Product Size(L x W x H): 4.2 x 2.1 x 1.8 cm / 1.7 x 0.8 x 0.7 inches                                                  <br />                        Package Size(L x W x H): 6.0 x 4.0 x 3.0 cm                                                	<br />Package Contents<br />	 Package Contents: 1 x Smoke Gas Sensor Module?  1 x Cable                                                	<br /><br /><br /><br />                                                <br />