SMD1012 Hydrogen Gas Sensor Toxic Flammable Explosion-proof Gas Detection Sensor

Product Overview:

The SMD1012 is a high - performance MEMS (Micro - Electro - Mechanical Systems) semiconductor gas sensor. It is encapsulated in a ceramic package, which offers excellent protection against mechanical stress, humidity, and chemical corrosion, ensuring stable operation and a long service life. This sensor is specifically designed to detect various gases, making it suitable for a wide range of applications in environmental monitoring, safety detection, and industrial process control.

Technical Specifications

1. Gas Detection Information:

• Detected Gases: The SMD1012 sensor is capable of detecting multiple gases, including but not limited to alcohol, smoke, and certain volatile organic compounds (VOCs). This multi - gas detection capability makes it a versatile choice for different gas - sensing scenarios.
• Detection Concentration Range: For example, when detecting ethanol, it can measure concentrations within a specific range (e.g., 0 - [X] ppm, where [X] is the maximum detectable concentration depending on the design). This wide range allows it to adapt to various environments, from relatively clean air with trace amounts of the target gas to areas with higher pollution levels.
• Resolution: It has a high - resolution ability, such as being able to distinguish changes in gas concentration as small as [Y] ppm (e.g., 0.1 ppm for ethanol), enabling precise measurement of gas levels.

2. Electrical Parameters:

• Circuit Voltage (Vc): The sensor can operate under a circuit voltage of ≤5V or 3.3V DC. This flexibility in power supply requirements makes it compatible with a variety of electronic circuits and systems, facilitating its integration into different devices.
• Heating Voltage (Vh): The required heating voltage is [specified value] ± [tolerance] V, which can be either AC or DC. Heating the sensor is crucial as it activates the semiconductor material, enhancing its sensitivity to the target gases.
• Load Resistance (RL): The load resistance is adjustable, and the specific value is subject to the delivery report. This adjustability allows users to optimize the sensor's output characteristics according to their specific application needs.
• Heating Resistance (Rh): At room temperature, the heating resistance of the SMD1012 sensor is measured to be [Rh value] ± [tolerance] Ω.
• Heating Power Consumption (Ph): The heating power consumption is relatively low, ≤[Ph value] mW, which is beneficial for power - sensitive applications, such as battery - operated gas detectors.
• Sensitive Body Resistance (Rs): When tested in air, the sensitive body resistance of the sensor ranges from [lower limit] to [upper limit] KΩ.

3. Sensitivity and Related Parameters:

• Sensitivity (S): Defined as the ratio of the sensor's resistance in air (R0) to its resistance in the presence of a certain concentration of the target gas (e.g., Rs in [Z] ppm of the gas), the sensitivity of the SMD1012 sensor is ≥[sensitivity value]. A higher sensitivity indicates that the sensor can more effectively detect small changes in gas concentration.
• Slope (α): The slope represents the rate of change of the sensor's response with respect to different gas concentrations. It is specified as ≤[α value] (e.g., R[higher concentration] / R[lower concentration] of the gas), which helps in understanding the linearity of the sensor's response curve.

4. Test Conditions:

• Environmental Conditions: The standard test conditions for the SMD1012 sensor include a temperature of 20 °C ± 2 °C and a humidity of 55% ± 5% RH. These controlled environmental conditions ensure consistent and comparable test results across different test setups.
• Circuit Conditions: For the standard test circuit, Vc is set to 5V or 3.3 ± 0.1V, and Vh is set to the specified heating voltage value ± its tolerance. Before accurate gas measurement, the sensor requires a pre - heating time of [pre - heating time range] minutes to reach its optimal operating state.

5. Response and Recovery Time:

• Response Time (T₉₀): The sensor can reach 90% of its final response value within less than [response time value] seconds when exposed to the target gas. This fast response time is important for real - time gas detection applications, allowing for quick identification of gas presence and concentration changes.
• Recovery Time (T₁₀): After the gas is removed, the sensor can recover to 10% of its initial state within less than [recovery time value] seconds, ensuring that it can quickly resume normal operation for subsequent detections.

6. Service Life:

The SMD1012 gas sensor has a service life of ≥3 years, providing long - term reliability and stability in gas detection applications, reducing the need for frequent replacement and maintenance.

Applications

• Home Safety: It can be integrated into home security systems to detect the presence of alcohol (e.g., in case of potential gas leaks from alcohol - containing products) or smoke, which may indicate a fire hazard. Additionally, it can monitor for harmful VOCs that could affect indoor air quality and the health of residents.
• Industrial Settings: In industrial environments, such as chemical plants, paint shops, and printing factories, the SMD1012 sensor can be used to monitor the concentration of various gases emitted during production processes. This helps in ensuring compliance with safety regulations, protecting the health of workers, and preventing potential environmental pollution.
• Automotive and Transportation: For automotive applications, it can be used to detect gases inside the vehicle cabin, such as those emitted from interior materials or from potential fuel leaks. In public transportation, it can help maintain good air quality for passengers by monitoring for harmful gases.
• Environmental Monitoring: In outdoor environmental monitoring projects, the sensor can be deployed to detect gases in the ambient air, contributing to a better understanding of air quality and the impact of industrial emissions or other sources of pollution on the environment.

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