Health Safety is a major issue in current era. Carbon monxide poisoning is the major cause of deaths in this world and good safety systems are needed to be implemented. According to a survey by NCBI there are 5 million people across world who die because of carbon monoxide (which is p
Automated standalone gas heater
Health Safety is a major issue in current era. Carbon monxide poisoning is the major cause of deaths in this world and good safety systems are needed to be implemented. According to a survey by NCBI there are 5 million people across world who die because of carbon monoxide (which is produced during gas burning) and gas leakage.

And loss due to these accidents become even more sever, it can also kill whole family either buy burning them or by suffocating them. Carbon monoxide poisoning is one of the major problem which can cause death, because it cause suffocation. During this poisoning people experience nausea and dizziness. Several people have been suffocated and some got burned. So we have worked on a project in which we have built a device which can be attached to gas heater making existing heater smart. So, here we have designed a system which works autonomously.
This project aims at providing an accurate, IoT enabled, autonomous and efficient solution (consisting of carbon monoxide sensor, methane sensor, controller, GSM/Wi-Fi modules and mobile application) for detection of any poisoning either of carbon monixide or methane. Our smart system will continuously (24/7) monitor the major signs (poisoning indicator, battery charging, ON/OFF, etc.) of room where the heater will be placed. After acquiring the data through sensors, the proposed system will run the algorithms to identify the poisoning in any of the aforementioned vital signs. In case of any undesired condition, heater will alarm user by buzzer sound and also by LED signs, and OFF action will be performed by microcontroller to the heater, to control the further poisoning.
There are some features of it. One of the important feature is to turn on and off gas appliance by itself. Also when amount of carbon monoxide in air reaches at its hazardous level, it autonomously turn off the whole gas system. The hazardous level for carbon monoxide is 500ppm. This is the level at which human can’t survive and can even be on death bed. Also it notifies the person about hazardous condition either by alarm. This system can be turned on and off wirelessly. Basic purpose of this project is to implement it on domestic level.
A gas heater is used by people from all economic backgrounds, and though one cannot deny its widespread use, it is also a source of lethal gasses. As in autopsy the test of carbon monoxide is not conducted normally. Although it is a global problem but in under developing countries, this problem is more severe. There are devices which can detect carbon monoxide and natural gas. However, these devices are just alarm devices. They simply alert their users about production of carbon monoxide at a threshold level.
These accidents based on gas heater usage can be reduced to a minimum level by introducing a proper solution. One of the proposed solutions to this problem is building a device that does not just alarm the user, but also acts on stimulus autonomously. With this alert, it will also inform the user that the room should be ventilated. For developing countries it is difficult to afford this kind of device for safety purposes. Cost is major problem in these countries. Therefore, one of the most important targets of this project is to build a safety device which is cost efficient.
The objectives of the project are
The project has it's both hardware and software part. Software part is for microcontroller i-e Arduino nano, and the harware part includes whole mechanical part driving DC motor and controlling valve to turn ON and OFF heater. we have build charging circuit to charge the batteries of heater so it can operate autonomously in case of cut of power supply. We Implemented the PCB designed circuit into an ordinary gas heater. To test this PCB designed circuit we designed an acrylic box with an inlet and outlet. in which carbon monoxide and methane is injected to test functionality of circuit.
People living in developed countries have higher GDP per capital. To implement safety measurement in all of their buildings is not big deal there. But for developing countries it is difficult to afford this kind of device for safety purposes. Cost is major problem in these countries. Therefore, one of the most important benefit of this project is it's cost efficiency
The second most important benefit of this project that this device poses no risk to human lives. This device is time efficient with maximum response to exposure of carbon monoxide and methane. Suffocation and burning issues can be reduced by attaching this safety device with any ordinary gas heater. As such, not only is this device intended to be cost efficient, but also, it will cater to a wider audience.
Benefits of this device are as follows:
Final deliverable includes an autonomous gas heater with having all features of autonomus control and IoT in case of harzardous condition. All the data relating to leakage of methane and carbon monoxide gas will be sent to Wifi making it IoT based. We have set threshold of 500 ppm for carbon monoxide gas to turn OFF the gas heater, so it can not suffocate the room. We are basicaly controlling the valve to turn ON/OFF the gas heater. We are charging the the heater with the help of charging circuit.
Here are some technical details:
Sensors Selection
Sensors which we have used are selected on the basis of working efficiency and cost efficiency. Life of sensors was one of the major issue. We selected MQ5 and MQ7 or detection of carbon monoxide and methane. These sensors also have good and reliable life around 5 years. Here is the summary of sensors.

Charging circuit
Charging circuit plays a very important role to make it standalone system. This charging circuit is charging batteries on which the whole system is operating. One of the most important feature of this circuit is that it will only draw power and gives to microcontroller in case of any operation. If no operation will be performed the system will draw zero power from batteries.
Data communication through wifi
We initially tested all the sensors on Arduino. Then we shifted to ESP32 for using its built-in Wi-Fi shield for communication with online Cayenne’s server.
App development
To access the data remotely from online server, an App is also subjected to be developed. So that, device can be made easy to use and easily adoptable. It will give an instant access to the alrming situation created by any gas heater.
Embedded battery
An embedded battery is used to operate the whole circuit for wireless setup. Additional circuitry for charging the battery is also included in the final prototype of the device. Small sized high power Li-Ion battery is required to use in smart device to make it compact.
| Item Name | Type | No. of Units | Per Unit Cost (in Rs) | Total (in Rs) |
|---|---|---|---|---|
| Arduino nano | Equipment | 2 | 500 | 1000 |
| MQ2 sensors | Equipment | 2 | 180 | 360 |
| Power bank IC | Equipment | 1 | 80 | 80 |
| Soldering glass | Equipment | 1 | 500 | 500 |
| MQ2 sensor | Equipment | 1 | 200 | 200 |
| Flow sensor | Equipment | 1 | 450 | 450 |
| 1N4007 | Equipment | 25 | 25 | 625 |
| 1K resistor | Equipment | 8 | 12 | 96 |
| 3.3V Zener Diaode | Equipment | 3 | 5 | 15 |
| WD 40 | Equipment | 1 | 350 | 350 |
| 7806 | Equipment | 5 | 10 | 50 |
| tp4056 | Equipment | 3 | 50 | 150 |
| Dc to Dc Buck | Equipment | 2 | 800 | 1600 |
| 26BYJ-48 stepper motor | Equipment | 1 | 200 | 200 |
| 2N2222 | Equipment | 10 | 3 | 30 |
| MQ5 | Equipment | 3 | 180 | 540 |
| Dc-Socket | Equipment | 5 | 10 | 50 |
| Solding bit | Equipment | 1 | 50 | 50 |
| ULN 2003 | Equipment | 3 | 20 | 60 |
| Male and Female Strips | Equipment | 4 | 10 | 40 |
| 3m Wire | Equipment | 3 | 50 | 150 |
| Lead 928 coper | Equipment | 1 | 300 | 300 |
| scue | Equipment | 1 | 20 | 20 |
| LM317 | Equipment | 5 | 20 | 100 |
| BD139 | Miscellaneous | 12 | 6 | 72 |
| KJ charger 8600 | Equipment | 1 | 1000 | 1000 |
| L298 Module | Equipment | 1 | 200 | 200 |
| 12-24VD gear motor (6 wire) | Equipment | 1 | 450 | 450 |
| Small crew Motor (2 wire) | Equipment | 1 | 250 | 250 |
| ESP8266 | Equipment | 1 | 250 | 250 |
| L293D Ic | Equipment | 2 | 75 | 150 |
| 9435 | Equipment | 3 | 33 | 99 |
| 2 pin G connectors | Equipment | 10 | 5 | 50 |
| Arduino Nano | Equipment | 1 | 330 | 330 |
| Buzzer | Equipment | 4 | 15 | 60 |
| L293D Ic | Equipment | 2 | 80 | 160 |
| TP4056 | Equipment | 3 | 50 | 150 |
| 6V relay | Equipment | 2 | 30 | 60 |
| Dc to Dc Buck 2596 | Equipment | 2 | 90 | 180 |
| 2 Cell Holder | Equipment | 0 | 0 | 0 |
| Lm339 | Miscellaneous | 2 | 20 | 40 |
| Acrylic Sheet box | Equipment | 1 | 2000 | 2000 |
| Motor Griper | Equipment | 2 | 700 | 1400 |
| Handle valve | Equipment | 1 | 300 | 300 |
| Ordinary Heater | Equipment | 1 | 3500 | 3500 |
| Methane gas | Equipment | 1 | 200 | 200 |
| Safety masks | Equipment | 2 | 6000 | 12000 |
| Total in (Rs) | 29917 |
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