Dear Sir
Kindly I need the full report for the LPG leakage detection system.

Yours: Yousuf

lpg gas leakage detection alarm full report

Working of gas leakage alarm

Zener diode Z1 is used to regulate the Vcc to 5V DC to drive the gas sensor module. See Voltage regulator using zener diode.The sen-1327 gas sensor module from Rhydolabz is used in this circuit. Its output goes high when the gas level exceeds definite point.A preset employed in the module is used to set the threshold or reference level. Interfacing with the SEN 1327 sensor module is done through a 4 pin SIP header.A MQ-6 gas sensor is used in the module. As per its datasheet, it has high sensitivity to propane, butane, isobutene, LPG and natural gas.Each time there is LPG Concentration of 1000 ppm (parts per million) in the area, the OUTPUT pin of the sensor module goes high.High voltage at the 4th pin (Reset pin) enables timer IC 555, which is wired as an astable multivibrator. The multivibrator essentially works as a tone originator.Without the high voltage at 4th pin (Reset pin) the IC remain in the Reset state.
Output pin 3 of IC 555 is connected to LED1 and speaker driver transistor SL100. LED1 glows and the alarm sounds to aware the user of gas leakage.The pitch of the tone can be changed by varying preset VR1.Provide a suitable heat sink for transistor SL100.