ADVANCED GAS DETECT AND ALERT SYSTEM This is a Live Real-Time Project designed at low cost with high accuracy. It is easy to implement. This is very much cost effective when compared to other devices in online. This Project is designed to detect the LPG Gas Leakages and to alerts the users through Audio-Visual Indications. This Project is designed to detect the LPG& 4 other Dangerous Gases from a range 200(PPM) to 10,000 PPM. Whenever there is LPG concentration of 1000 ppm (parts per million) in the area. A buzzer is connected to produce audible alert signal. This LPG Gas Sensor can be used to make wireless Gas leak detector in home security system .The LPG Gas Sensor Module is designed to enable LPG detection interface to Microcontroller without ADC Channels. By providing a GSM modem we can receive “ SMS ALERTS” also…
Output image &Video :
ABSTRACT LPG gas is supplied in pressurized steel cylinders. As this gas is heavier than air, when it leaks from a cylinder it flows along floor and tends to settle in low spots such as a basement. This can cause fire or suffocation if not dealt with. Here is a circuit that detects the leakage of LPG gas and alerts the user through audio-visual indications. This LPG Gas Sensor (MQ6), ideal sensor for use to detect the presence of a dangerous Liquefied petroleum gas (LPG) and it has high sensitivity to propane, butane, isobutene, natural gas. The sensor can also be used to detect combustible gases, especially methane. This circuit can detect leakages in your Home, car or in a service station, storage tank environment. This unit can be easily implemented to industrial level by upgrading its it s ranges. This project is designed to detect the LPG from 200parts per million (PPM) to 10,000 PPM. Whenever there is LPG concentration of 1000 ppm (parts per million) in the area, the OUT pin of the sensor module goes high. This signal drives timer IC 555, which is wired as an astablemultivibrator. The multivibrator basically works as a tone generator. A buzzer is connected to produce audible alert signal. This LPG Gas Sensor can be used to make wireless Gas leak detector in home security system .The LPG Gas Sensor Module is designed to enable LPG detection interface to Microcontroller without ADC Channels. By providing a GSM modem we can receive “SMS ALERTS” also..
Design Of the Project:
In this project we have used MQ-6 gas sensor. Whenever W henever LPG gas is leaked the sensor detects and it passes signal signal to timer circuit. Here we have used IC 555 555 timer which acts as astablemultivibrator .Then it will be given to Transistor driver circuit
which activates buzzer and LED and alerts the user through audio-visual indications.
COMPONENTS U: S.no
Components used
Range/Type
Quantity
1
SEN-1327 gas sensor
2
IC 555 TIMER (8 pin)
3
Transistor
SL100
1no
4
Zener diode
5V
1no
5
Speaker
0.5W,8 Ω
1no
6
Battery
9V
1no
7
LED
1V
1no
8
Capacitors
0.1uf
2no
9
Resistors
10
Variable resistor On /off switch and Connecting wires
10kΩ 4.7kΩ 1kΩ 22 Ω 560Ω 10kΩ ______
1no 1no 1no 1no 1no 1no ______
200ppm-10,000ppm 4.5 to 15 V(Vcc)
1no 1no
CIRCUIT DIAGRAM:
SEN-1327 GAS Sensor Module
The SEN-1327 gas sensor module from RhydoLABZ,kochi is used in this circuit. This LPG Gas Sensor (MQ6), ideal sensor for use to detect the presence of a dangerous Liquefied petroleum gas (LPG) and it has high sensitivity to propane, butane, isobutene, natural gas. The sensor can also be used to detect combustible gases, especially methane. This sensor has a high sensitivity and fast response time. The drive circuit is very simple. This circuit can detect leakages in your Home, car or in a service station, storage tank environment. This unit can be easily implemented to industrial level by upgrading its ranges.
FEATURES:
Uses the MQ-6 LPG Gas Sensor Easy SIP interface Compatible with most microcontrollers we can upgrade this to provide SMS alerts also Onboard Status and Power LED Onboard Pot for threshold setting On board microcontroller This sensor has a fast response time Good sensitivity to Combustible gas in wide range r ange Long life and low cost Simple drive circuit High sensitivity to Propane, Butane and LPG
Circuit Working:
Pin details of the gas sensor module are shown in Fig. 2. An MQ-6 gas sensor is used in the gas sensor module. As per its datasheet, it has high sensitivity to propane, butane, isobutene, LPG and natural gas. The sensor can also be used to detect combustible gases, especially methane. This circuit has been tested with LPG gas and was found to work very fine. Whenever there is LPG con-centration of 1000 ppm (parts per million) in the area, the OUT pin of the sensor module goes high. This signal drives timer IC 555, which is wired as an astablemultivibrator. The multivibrator basically works as a tone generator. Output pin 3 of IC 555 is connected to LED1 and speaker-driver transistor SL100 through current-limiting resis-tors R5 and R4, respectively. LED1 glows and the alarm sounds to alert the user of gas leakage. The pitch of the tone can be changed by varying preset VR1. Use a suitable heat-sink for transistor SL100.
