Alphasense H2S-A1 Hydrogen Sulfide Gas Sensor

Description

The Alphasense H2S-A1 Hydrogen Sulfide Gas Sensor, crafted by Alphasense in the United Kingdom, stands as a pivotal 3-pin sensor in the realm of gas detection technology. Specifically engineered for the detection of hydrogen sulfide (H2S) gas in the surrounding environment, this sensor boasts a comprehensive measurement range from 0 to 100 ppm, proficiently identifying hazardous levels of H2S gas in the air.

Technical Specifications of the H2S-A1 Sensor by Alphasense

• Measurement Range: 0 to 100 ppm
• Operating Voltage: 5 VDC
• Current Consumption: 80 mA
• Load Resistance: 10 kΩ
• Warm-up Time: Less than 30 seconds
• Operating Temperature: -30 to 50 °C
• Operating Pressure: 80 to 120 kPa
• Lifetime: 2 years
• Dimensions: 20.3 × 12.5 × 6.5 mm
• Weight: 1.2 grams
• Humidity Resistance: 85% RH
• Chemical Resistance: Exhibits resistance to acids and bases

 

Applications of the H2S-A1 Sensor

The versatile nature of the H2S-A1 sensor lends itself to various industries and applications, including:

1. HVAC Systems
2. Wastewater Treatment Facilities
3. Chemical Industry
4. Oil and Gas Sector
5. Refineries
6. Mining Operations
7. Paper Production Facilities
8. Agricultural Practices

 

Advantages of the H2S-A1 Sensor

• High Accuracy: Ensures precise detection of H2S gas concentrations.
• High Stability: Maintains consistent performance even in challenging environmental conditions.
• Fast Response Time: Delivers rapid alerts to potential H2S gas hazards.
• Low Power Consumption: Optimizes energy efficiency, ideal for continuous monitoring applications.
• Long Life: Offers an extended operational lifespan, enhancing cost-effectiveness.
• Compact Size: Compact dimensions facilitate easy integration into various systems.
• Reasonable Cost: Provides cost-effective solutions for gas detection requirements.

Disadvantages of the H2S-A1 Sensor

• Sensitivity to Other Gases: Exhibits sensitivity to gases such as carbon dioxide and carbon monoxide.
• Requires Periodic Calibration: Mandates regular calibration to uphold accuracy standards.

 

Working Principle of the H2S-A1 Sensor

The H2S-A1 sensor operates on the Metal Oxide Semiconductor (MOS) principle. A thin layer of metal oxide is deposited on a ceramic substrate within the sensor. When H2S gas interacts with the sensor’s surface, it induces changes in the electrical resistance of the metal oxide layer. These variations in resistance are then measured by the sensor’s electronic circuitry, generating an output signal indicative of H2S gas presence.

Important Considerations

• Prior to deploying the H2S-A1 sensor, thorough examination of its datasheet is imperative.
• Installation should be conducted in a clean, dry environment to ensure optimal performance.
• Avoid exposure to direct sunlight, high humidity, and corrosive chemicals to prolong sensor lifespan.
• Regular calibration sessions are necessary to uphold the sensor’s accuracy and reliability.

 

FAQs:

1. What is the measurement range of the H2S-A1 sensor?
   • The measurement range is 0 to 100 ppm.
2. What is the operating voltage of the sensor?
   • The operating voltage is 5 VDC.
3. Does the sensor require periodic calibration?
   • Yes, regular calibration is necessary for accuracy.
4. What industries can benefit from this sensor?
   • HVAC, wastewater treatment, chemical, oil & gas, refineries, mining, paper production, and agriculture.
5. How long is the sensor’s lifetime?
   • The sensor has a lifespan of 2 years.
6. What is the working principle of the H2S-A1 sensor?
   • It operates on the Metal Oxide Semiconductor (MOS) principle.