Gas

This board has been designed to use with different GAS Sensors MQ3.
It is the useful circuit to adapt the power of the Gas Sensor from the Arduino board. You can read the values through a resistive load.

Documentacion:
Schematic

Simple breakout board for the MQ - 3, MQ - 4, MQ - 6 and MQ - 7 gas sensors.  All you need is VCC at 5V, GND, and a resistor to an ADC, that is it.

Note: This is the PCB only. Sensors listed below.

Dimensions: 16.8mm diameter

Documents:

• Schematic
• Eagle Files
• Wiring Example

MQ303A is a semiconductor sensor for Alcohol detection. It has very good sensitivity and fast response to alcohol, suitable for portable alcohol detector.

Features:

• High sensitivity
• Fast response and resume
• long life and low cost
• Mini size

FEATURES

• Wide detecting scope             
• Fast response and High sensitivity
• Stable and long life
• Simple drive circuit

They are used in gas leakage detecting equipments in family and industry, are suitable for detecting of LPG, i-butane, propane, methane ,alcohol, Hydrogen, smoke. 

Datasheet here.

FEATURES

• High sensitivity to LPG, natural gas , town gas
• Small sensitivity to alcohol, smoke.             
• Fast response
• Stable and long life
• Simple drive circuit

APPLICATION

They are used in gas leakage detecting   equipments in family and industry, are suitable for detecting of LPG, natural gas , town gas, avoid the noise of alcohol and cooking fumes and cigarette smoke.


Datasheet here.

Gas leak detection for houses, workshops, commercial building...

Application
- Fire, Safety detection system.
- Coal gas, CO etc gas detection for houses/workshops/commercial building
- Gas leak alarm, Gas detector.

Datasheet

Features
- Good sensitivity to Harmful gases in wide range
- High sensitivity to Ammonia, Sulfide and Benze
- Long life and low cost
- Simple drive circuit

Application
- Domestic air pollution detector
- Industrial air pollution detector
- Portable air pollution detector

Datasheet

Features
- Good sensitivity to Ozone in wide range
- High sensitivity to Ozone
- Long life and low cost
- Simple drive circuit

Application
- Domestic Ozone concentration overload Detector
- Industrial Ozone concentration overload Detector
- Portable Ozone concentration overload Detector

Datasheet

Features
- Good sensitivity to Hydrogen in wide range
- High sensitivity to Hydrogen
- Long life and low cost
- Simple drive circuit

Application
- Domestic Hydrogen concentration Detector
- Industrial Hydrogen concentration Detector
- Portable Hydrogen concentration Detector

Datasheet

Features
- Good sensitivity to Combustible gas in wide range
- High sensitivity to Propane, Butane and LPG
- Long life and low cost
- Simple drive circuit

Application
- Domestic gas leakage detector
- Industrial Combustible gas detector
- Portable gas detector

Datasheet

Features

• Good sensitivity to Combustible gas in wide range
• High sensitivity to Natural gas
• Long life and low cost
• Simple drive circuit

Application

• Domestic gas leakage detector
• Industrial CO detector
• Portable gas detector

Datasheet

MR513 type gas sensor detect the gas concentration through resistance variation of platinum loop, which is based on the principle of the gas absorbed on the surface of metal oxide semiconductor lead to the heat exchange and electricity exchange variation. It consists of detecting element and compensating element, which are the two legs of electric bridge. When exposing to the combustible gas, the resistance of detecting element reduces and the voltage variation of bridge output increase in direct proportion according to gas concentration. The compensating element performs for the reference and temperature compensation functions.

Features

• High sensitivity, large signal output
• Short duration of initial stabilization, fast response.   
• Good reproducibility and reliability
• Low consumption, miniature design

Datasheet

This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer. It has a high sensitivity and fast response time. Sensor provides an analog resistive output based on alcohol concentration. The drive circuit is very simple, all it needs is one resistor. A simple interface could be a 0-3.3V ADC.

Features:

• 5V DC or AC circuit
• Requires heater voltage
• Operation Temperature: -10 to 70 degrees C
• Heater consumption: less than 750mW

Dimensions:

• 16.8mm diameter
• 9.3 mm height without the pins

Datasheet