MQ9 Gas Sensor Semiconductor Sensor for CO/Combustible Gas

The MQ9 Gas Sensor is a semiconductor sensor that is used to detect Combustible Gas like carbon monoxide (CO), methane (CH4), and liquefied petroleum gas (LPG). MQ9 is a relatively inexpensive sensor that is easy to use and can be integrated into a variety of applications.

MQ9 gas sensor has high sensitity to Carbon Monoxide, Methane and LPG. The sensor can use to detect different gases contains CO and combustible gases, with low cost and suitable for different application.

Sensitive material of MQ9 Gas Sensor is SnO2, which with lower conductivity in clean air. It make detection by method of cycle high and low temperature, and detect CO when low temperature (heated by 1.5V).

MQ9 Gas Sensor works by measuring the change in conductivity of a tin dioxide (SnO2) sensor element as it exposed to different gases. In clean air, the SnO2 sensor element has a low conductivity. However, when it is exposed to CO, CH4, or LPG, the sensor element’s conductivity increases. The amount of increase in conductivity is proportional to the concentration of the gas in the air.

The sensor’s conductivity is more higher along with the gas concentration rising. When high temperature (heated by 5.0V), it detects Methane, Propane etc combustible gas and cleans the other gases adsorbed under low temperature.

The MQ9 gas sensor requires a supply voltage of 5V. The sensor has two heating pins that are meant to be operated in a dual voltage cycle: 5 V across the pins for 60 seconds to heat the sensor and then 1.5 V for 90 seconds while reading the sensor. The sensor also has an analog output pin that can use to measure the change in conductivity of the sensor element.

Features : –

MQ9 Gas Sensor module is useful for gas leakage detecting (in home and industry). It can detect LPG, CO, and CH4. Based on its fast response time. Measurements can take as soon as possible. Also the sensitivity can adjust with the help of potentiometer.

Here are some of the benefits of using the MQ9 gas sensor:

• High sensitivity to CO, CH4, and LPG: The MQ-9 gas sensor is very sensitive to CO, CH4, and LPG. This means that it can detect even small concentrations of these gases in the air.
• Fast response time: The MQ-9 gas sensor has a fast response time. This means that it can detect changes in the concentration of CO, CH4, or LPG quickly.
• Low cost: The MQ-9 gas sensor is relatively inexpensive. This makes it a cost-effective option for applications where gas detection require.
• Easy to use: The MQ-9 gas sensor is easy to use. It can use with a variety of microcontrollers and Arduino boards.
• Can be integrated into a variety of applications: The MQ-9 gas sensor can integrate into a variety of applications. This includes home and industrial gas leak detection, fire and safety alarms, medical devices, and environmental monitoring.

MQ9 Gas Sensor Specifications : –

MQ9 sensor has two heating pins that are meant to be operated in a dual voltage cycle: 5 V across the pins for 60 seconds to heat the sensor and then 1.5 V for 90 seconds while reading the sensor. The sensor also has an analog output pin that can use to measure the change in conductivity of the sensor element.

It is important to note that the actual analog output voltage may vary depending on the specific sensor and the ambient conditions. The sensor should calibrate before use to ensure accurate readings.

Here are some of the specifications of the MQ-9 gas sensor:

• Working range: 10-1000ppm for CO and 100-10000ppm for combustible gases.
• Response time: 10 seconds.
• Recovery time: 60 seconds.
• Sensitivity: 100mV/ppm for CO and 50mV/ppm for combustible gases.
• Supply voltage: 5V.
• Current consumption: 150mA.
• Dimensions: 32mm x 25mm x 11mm.

MQ9 Gas Sensor Applications : –

The MQ-9 gas sensor is a versatile and reliable sensor that can use in a variety of applications. It is a good choice for applications where cost and ease of use are important factors. If you are looking for a reliable and inexpensive gas sensor that can use in a variety of applications, the MQ-9 gas sensor is a good option.

Here are some of the applications of the MQ-9 gas sensor:

• Home and industrial gas leak detection: The MQ-9 gas sensor can use to detect gas leaks in homes and industrial settings. This can help to prevent fires and explosions.
• Fire and safety alarms: The MQ-9 gas sensor can use in fire and safety alarms. This can help to alert people to the presence of CO or other combustible gases in the air.
• Medical devices: The MQ-9 gas sensor can use in medical devices, such as CO detectors and breathalyzers. This can help to diagnose and treat health conditions related to CO exposure.
• Environmental monitoring: The MQ-9 gas sensor can use to monitor the air quality in indoor and outdoor environments. This can help to identify and track pollutants, such as CO and LPG.

Package : –

1 x MQ9 Gas Sensor

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