Hazardous Gas leak detection

Safety plays a major role in today’s world and it is necessary that good safety systems are to be implemented in places of Chemical plant. The main objective of the work is designing Arduino based toxic gas detecting, alerting and protecting system. The hazardous gases like Hydrogen sulfide, Nitrogen dioxide and Carbon monoxide are sensed and displayed the status every second in the LCD display. The advantage of this automated detection, alerting system and protecting system over the manual method is that it offers quick response time and accurate detection of an emergency and in turn leading faster diffusion of the critical situation.

Hazardous Gas leak detection when the gas sensor senses the emission of hazardous gases like Hydrogen sulfide, Nitrogen dioxide and Carbon monoxide, it will generate the alerting sound and alert everyone and also the electric motors will close the electric gates and control the emission of hazardous gases.

   # 
 include 
 <LiquidCrystal.h> 
 
LiquidCrystal lcd 
 ( 
 8 
 , 
 9 
 , 
 10 
 , 
 11 
 , 
 12 
 , 
 13 
 ) 
 ; 
 int 
Gas_Sensor_Value = 
 0 
 ; 
 int 
Gas_sensor = 
A0 ; 
 int 
Piezo = 
 3 
 ; 
 int 
electric_motor_1 = 
 4 
 ; 
 int 
electric_motor_2 = 
 5 
 ; 
 int 
electric_motor_3 = 
 6 
 ; 
 int 
electric_motor_4 = 
 7 
 ; 
 void 
 setup 
 ( 
 ) 
 { 
lcd . 
 begin 
 ( 
 16 
 , 
 2 
 ) 
 ; 
 // set up the LCD's number of columns and rows: 
 pinMode 
 ( 
Gas_sensor , 
INPUT ) 
 ; 
 pinMode 
 ( 
Piezo , 
OUTPUT ) 
 ; 
 pinMode 
 ( 
electric_motor_1 , 
OUTPUT ) 
 ; 
 pinMode 
 ( 
electric_motor_2 , 
OUTPUT ) 
 ; 
 pinMode 
 ( 
electric_motor_3 , 
OUTPUT ) 
 ; 
 pinMode 
 ( 
electric_motor_4 , 
OUTPUT ) 
 ; 
 } 
 void 
 loop 
 ( 
 ) 
 { 
lcd . 
 clear 
 ( 
 ) 
 ; 
Gas_Sensor_Value = 
 analogRead 
 ( 
A0 ) 
 ; 
 if 
 ( 
Gas_Sensor_Value >= 
 700 
 ) 
 { 
 digitalWrite 
 ( 
Piezo , 
HIGH ) 
 ; 
 digitalWrite 
 ( 
electric_motor_1 , 
HIGH ) 
 ; 
 digitalWrite 
 ( 
electric_motor_2 , 
HIGH ) 
 ; 
 digitalWrite 
 ( 
electric_motor_3 , 
HIGH ) 
 ; 
 digitalWrite 
 ( 
electric_motor_4 , 
HIGH ) 
 ; 
lcd . 
 print 
 ( 
 "Caution:Gas leak" 
 ) 
 ; 
 // Print a message to the LCD. 
 delay 
 ( 
 1000 
 ) 
 ; 
 } 
 else 
 { 
 digitalWrite 
 ( 
Piezo , 
LOW ) 
 ; 
 digitalWrite 
 ( 
electric_motor_1 , 
LOW ) 
 ; 
 digitalWrite 
 ( 
electric_motor_2 , 
LOW ) 
 ; 
 digitalWrite 
 ( 
electric_motor_3 , 
LOW ) 
 ; 
 digitalWrite 
 ( 
electric_motor_4 , 
LOW ) 
 ; 
lcd . 
 print 
 ( 
 "The environment" 
 ) 
 ; 
 // Print a message to the LCD. 
lcd . 
 setCursor 
 ( 
 0 
 , 
 1 
 ) 
 ; 
lcd . 
 print 
 ( 
 "is Safe" 
 ) 
 ; 
 delay 
 ( 
 1000 
 ) 
 ; 
 } 
 }