SMD1013B SMD1013 MEMS VOC Gas Sensor High Sensitivity Low Power Consumption Air Quality Sensor 

General Introduction:

The SMD1013 is a MEMS (Micro - Electro - Mechanical Systems) semiconductor gas sensor, which is designed with high - precision technology. It is packaged in a ceramic form, providing good protection and stability for the internal sensitive components. This sensor is capable of detecting various gases, including alcohol, smoke, formaldehyde, etc., making it suitable for a wide range of applications in environmental monitoring, safety detection, and industrial process control.

Technical Specifications:

• Detected Gas and Concentration Range:
  • The sensor can detect ethanol within a concentration range of 0 to 100 ppm. It also has sensitivity to other gases mentioned above, which makes it a versatile option for different gas - detection scenarios.
  • The resolution for ethanol detection is 0.2 ppm, allowing for precise measurement of low - level ethanol concentrations.
• Electrical Parameters:
  • Circuit Voltage (Vc): It can operate under a circuit voltage of ≤5V or 3.3V DC, providing flexibility in different circuit designs.
  • Heating Voltage (Vh): The required heating voltage is 1.6 ± 0.1 V, which can be either AC or DC. This heating is crucial for activating the semiconductor material inside the sensor to improve its gas - sensing performance.
  • Load Resistance (RL): The load resistance is adjustable, and the specific value is subject to the delivery report. This adjustability enables users to optimize the sensor's output according to their specific circuit requirements.
  • Heating Resistance (Rh): At room temperature, the heating resistance is measured to be 45 ± 3 Ω.
  • Heating Power Consumption (Ph): The heating power consumption is ≤30 mW, indicating relatively low power usage for the heating process.
  • Sensitive Body Resistance (Rs): When tested in air, the sensitive body resistance ranges from 10 to 500 KΩ.
• Sensitivity and Related Parameters:
  • Sensitivity (S): Defined as R₀ (in air) / Rs (in 10ppm ethanol), the sensitivity of the SMD1013 sensor is ≥6, showing a significant change in resistance when exposed to a small amount of ethanol in the air.
  • Slope (α): The slope, which represents the rate of change of the sensor's response with respect to different ethanol concentrations, is ≤0.3 (R₁₀ₚₚₘ / R₁ₚₚₘ ethanol).
• Test Conditions:
  • Environmental Conditions: The standard test conditions for temperature and humidity are 20 ± 2 °C and 55 ± 5 %RH respectively.
  • Circuit Conditions: For the standard test circuit, Vc is set to 5 V or 3.3 ± 0.1 V, and Vh is 1.6 ± 0.1 V. The preheating time required before accurate measurement can be taken is 3 - 5 minutes.
• Response and Recovery Time:
  • Response Time (T₉₀): It takes less than 30 seconds for the sensor to reach 90% of its final response value when exposed to the target gas, indicating a relatively fast - acting characteristic.
  • Recovery Time (T₁₀): The sensor can recover to 10% of its initial state within less than 60 seconds after the gas is removed.
• Service Life:

The SMD1013 gas sensor has a service life of ≥3 years, ensuring long - term reliable operation in various applications.

Applications

• Home Safety: It can be integrated into home security systems to detect alcohol leakage (for example, in households with a large amount of stored alcohol), as well as the presence of smoke and formaldehyde, which may be harmful to human health.
• Industrial Settings: In industrial environments, it can be used to monitor the concentration of volatile organic compounds such as in the air, helping to ensure a safe working environment and comply with environmental regulations.
• Automotive and Transportation: For applications in the automotive field, it can be used to detect alcohol in the driver's cabin to prevent drunk - driving. Additionally, it can be applied in public transportation vehicles to monitor the air quality inside the cabins.