SMD1008 MEMS Methane Gas Sensor Natural Gas Detection Dedicated Sensor

                                       SMD1008 MEMS Methane Gas Sensor Natural Gas Detection Dedicated Sensor

General Introduction:

The SMD1008 is a highly - specialized MEMS (Micro - Electro - Mechanical Systems) semiconductor gas sensor, designed with a ceramic package. This packaging offers robust protection against external environmental factors such as mechanical vibrations, humidity, and chemical contaminants, ensuring stable and reliable performance over an extended period. It is primarily engineered for the detection of methane gas, making it an essential component in various applications related to safety, environmental monitoring, and industrial processes.

Technical Specifications:

1. Gas Detection Parameters:

• Detected Gas: Methane (CH₄) is the main target gas for the SMD1008 sensor. Methane is a common and potentially hazardous gas, often associated with natural gas leaks, coal mines, and biogas production.
• Detection Concentration Range: The sensor is capable of detecting methane concentrations within the range of 0 to 10,000 ppm. This wide - ranging detection ability allows it to be used in diverse scenarios, from detecting trace amounts of methane in relatively clean environments to high - concentration monitoring in industrial settings or areas prone to gas leaks.
• Resolution: With a resolution of 500 ppm, the SMD1008 sensor can accurately distinguish changes in methane concentration, providing users with detailed and precise measurement data.

2. Electrical Parameters:

• Circuit Voltage (VC): The sensor operates under a circuit voltage of ≤5V DC. This voltage requirement makes it compatible with a broad spectrum of electronic circuits and power supply systems, facilitating its integration into different gas - detection devices.
• Heating Voltage (VH): A heating voltage of 1.8V ± 0.05V, which can be either AC or DC, is applied to the sensor. Heating is crucial as it activates the semiconductor material within the sensor, enhancing its sensitivity and response speed to methane gas molecules.
• Load Resistance (RL): The load resistance of the SMD1008 is adjustable, and the specific value is determined according to the delivery report. This adjustability enables users to optimize the sensor's output characteristics to meet the specific requirements of their applications.
• Heating Resistance (RH): At room temperature, the heating resistance of the sensor measures 45Ω ± 5Ω.
• Heating Power Consumption (PH): The heating power consumption of the SMD1008 is relatively low, with a maximum of ≤30mW. This low - power consumption is beneficial for applications where power efficiency is a key consideration, such as battery - powered or remote - monitoring gas - detection systems.
• Sensitive Body Resistance (RS): When tested in air, the sensitive body resistance of the sensor ranges from 5KΩ to 300KΩ.

3. Sensitivity and Related Characteristics:

• Sensitivity (S): Defined as the ratio of the sensor's resistance in air (R0) to its resistance in the presence of 5000 ppm of methane (Rs), the sensitivity of the SMD1008 sensor is ≥5. This high sensitivity ensures that the sensor can effectively detect even moderate levels of methane and provide a significant change in its electrical resistance, which can be easily measured and translated into concentration readings.
• Slope (α): The slope, which represents the rate of change of the sensor's response with respect to different methane concentrations, is ≤0.5 (R5000ppm / R1000ppm CH₄). This parameter helps in understanding the linearity of the sensor's response curve, indicating how consistently the sensor responds to varying methane concentrations.

4. Test Conditions:

• Environmental Conditions: The standard test conditions for the SMD1008 sensor include a temperature of 20°C ± 2°C and a humidity level of 55% ± 5% RH. These controlled environmental factors ensure that the test results are consistent and comparable across different testing environments and batches of sensors.
• Circuit Conditions: For the standard test circuit, VC is set to 5V ± 0.1V, and VH is set to 1.8V ± 0.1V. Before accurate methane detection can occur, the sensor requires a pre - heating time of no less than 3 minutes to reach its optimal operating state.

5. Response and Recovery Time:

• Response Time (T₉₀): The SMD1008 sensor can reach 90% of its final response value within less than 15 seconds when exposed to methane gas. This fast response time is crucial for real - time gas detection applications, allowing for quick identification of methane leaks or concentration changes and enabling timely safety measures to be taken.
• Recovery Time (T₁₀): After the methane gas is removed, the sensor can recover to 10% of its initial state within less than 30 seconds. This rapid recovery time ensures that the sensor can quickly resume normal operation and be ready for subsequent detections, enhancing the overall efficiency and reliability of the gas - detection system.

6. Service Life:

The SMD1008 gas sensor has a service life of ≥3 years, providing long - term reliability and stability in methane detection applications. This extended service life reduces the need for frequent sensor replacement, lowering maintenance costs and ensuring continuous and accurate monitoring of methane levels.

Applications:

• Home Safety: In residential settings, the SMD1008 sensor can be integrated into gas leak detection systems. Since natural gas mainly consists of methane, the sensor can detect even small leaks, alerting homeowners in time to prevent potential explosions or asphyxiation hazards.
• Industrial Settings: In industries such as oil and gas production, coal mining, and chemical manufacturing, where methane is either a by - product or a raw material, the SMD1008 sensor can be used to monitor methane concentrations in the workplace. This helps in ensuring compliance with safety regulations, protecting the health of workers, and preventing accidents caused by methane accumulation.
• Environmental Monitoring: For environmental research and monitoring projects focused on biogas emissions from landfills, agricultural activities, or wetland areas, the SMD1008 sensor can accurately measure methane concentrations in the ambient air. This data is valuable for understanding the contribution of different sources to global methane emissions and for formulating strategies to mitigate climate change.