diff --git a/examples/MQ-Board-Calibration/MQ-Board-Calibration.ino b/examples/MQ-Board-Calibration/MQ-Board-Calibration.ino
index bc200e8..13f72c2 100644
--- a/examples/MQ-Board-Calibration/MQ-Board-Calibration.ino
+++ b/examples/MQ-Board-Calibration/MQ-Board-Calibration.ino
@@ -58,7 +58,7 @@ void setup() {
 }
 
 void loop() {
-  //Read the sensor and print in serial port
+  //Read the sensor
   int lecture2 =  MQ2.calibrate();
   int lecture3 =  MQ3.calibrate();
   int lecture4 =  MQ4.calibrate();
diff --git a/examples/MQ-Board/MQ-Board.ino b/examples/MQ-Board/MQ-Board.ino
new file mode 100644
index 0000000..3888bf9
--- /dev/null
+++ b/examples/MQ-Board/MQ-Board.ino
@@ -0,0 +1,69 @@
+/*
+  MQUnifiedsensor Library - calibrating an MQ2 to MQ9
+
+  Demonstrates the use a MQ2 sensor.
+  Library originally added 01 may 2019
+  by Miguel A Califa, Yersson Carrillo, Ghiordy Contreras, Mario Rodriguez
+ 
+  Added example
+  modified 27 May 2019
+  by Miguel Califa 
+
+ This example code is in the public domain.
+
+*/
+
+//Include the library
+#include <MQUnifiedsensor.h>
+
+//Definitions
+#define pin2 A2 //Analog input 2 of your arduino
+#define pin3 A3 //Analog input 3 of your arduino
+#define pin4 A4 //Analog input 4 of your arduino
+#define pin5 A5 //Analog input 5 of your arduino
+#define pin6 A6 //Analog input 6 of your arduino
+#define pin7 A7 //Analog input 7 of your arduino
+#define pin8 A8 //Analog input 8 of your arduino
+#define pin9 A9 //Analog input 9 of your arduino
+
+//Declare Sensor
+
+MQUnifiedsensor MQ2(pin2, 2);
+MQUnifiedsensor MQ3(pin3, 2);
+MQUnifiedsensor MQ4(pin4, 2);
+MQUnifiedsensor MQ5(pin5, 2);
+MQUnifiedsensor MQ6(pin6, 2);
+MQUnifiedsensor MQ7(pin7, 2);
+MQUnifiedsensor MQ8(pin8, 2);
+MQUnifiedsensor MQ9(pin9, 2);
+
+
+void setup() {
+  //Init serial port
+  Serial.begin(115200);
+  //init the sensor
+  MQ2.inicializar(); 
+  MQ3.inicializar(); 
+  MQ4.inicializar(); 
+  MQ5.inicializar(); 
+  MQ6.inicializar(); 
+  MQ7.inicializar(); 
+  MQ8.inicializar(); 
+  MQ9.inicializar(); 
+  //Print in serial monitor
+  Serial.print("MQ2 to MQ9 - lecture");
+}
+
+void loop() {
+  //Read the sensor and print in serial port
+  int lecture2 =  MQ2.read("", true);
+  int lecture3 =  MQ3.read("", true);
+  int lecture4 =  MQ4.read("", true);
+  int lecture5 =  MQ5.read("", true);
+  int lecture6 =  MQ6.read("", true);
+  int lecture7 =  MQ7.read("", true);
+  int lecture8 =  MQ8.read("", true);
+  int lecture9 =  MQ9.read("", true);
+  //Wait to measure next sample
+  delay(400);
+}