DS4-SO2-100 Solid-state Polymer Electrochemical Sulfur Dioxide Sensor For Environmental Air Quality Monitoring

DS4-SO2-100 Solid-state Polymer Electrochemical Sulfur Dioxide Sensor

Basic Information:

• Brand: EC Sense.
• Sensor Type: Solid-state polymer electrochemical sensor.
• Detectable Gas: Sulfur dioxide (SO₂).

Working Principle:

Adopting a three-electrode design, it utilizes solid-state polymer electrochemical technology. The sensor mainly consists of a working electrode, counter electrode, reference electrode, and solid-state electrolyte. SO₂ gas reaches the working electrode of the sensor through diffusion holes, where an electrochemical oxidation or reduction reaction occurs on the porous micro-surface of the electrode. Protons generated by the reaction migrate to the counter electrode through the polymer electrolyte, producing a current signal proportional to the concentration of the measured gas.

Performance Characteristics:

• Wide Voltage Range: Operates at 3.3V to 12V DC, with 5V DC recommended.
• Wide Temperature Range: Works at -40°C to +55°C without the need for temperature compensation.
• Rapid Response: Quickly detects changes in gas concentration and achieves stable measurement results in a short time for real-time monitoring.
• High Precision and Linearity: Features excellent linearity and high measurement accuracy, enabling accurate measurement of SO₂ gas at different concentrations.
• Long-term Stability: Exhibits minimal zero-point drift and stable signals during long-term use. The anti-poisoning design ensures reliable performance in complex environments.
• Low Power Consumption: Supports a low-power sleep mode, with customizable sleep/wake functions, suitable for IoT and battery-powered applications.
• Compact and Lightweight: Adopts the standard 4-series industrial size, a cylindrical design of 20x16.6mm, facilitating integration into various new or existing products.
• Simple Output: Supports simple UART digital output (3.3V half-duplex single-wire mode), making data collection convenient and easy to integrate with microcontrollers or IoT systems.
• Safe and Reliable: Has intrinsic safety certifications (Ex ia IIC T6 Ga), complies with RoHS standards, and is safe and environmentally friendly.

Technical Parameters:

• Range: Commonly 0-100ppm, with other ranges available.
• Resolution: Up to 0.5ppm or higher; in the 0-5ppm range, the resolution can reach 0.001ppm.
• Sensitivity: At 20°C, the sensitivity is 0.37±0.07μA/ppm.
• Baseline Drift: Within -20°C to 50°C, the baseline drift is less than 0.5ppm.
• Cross-sensitivity: Has certain cross-sensitivities to gases such as hydrogen sulfide, carbon monoxide, nitric oxide, nitrogen dioxide, hydrogen, and ammonia, but the values are small.

Application Fields:

• Environmental Protection: Used for monitoring ambient air quality, detecting the concentration of SO₂ in the atmosphere, providing data support for environmental protection departments, and assisting in evaluating environmental pollution status and formulating environmental protection policies.
• Industrial Fields: In industries such as metallurgy, power, petrochemicals, and mining, it is used to monitor waste gas emissions during industrial production and the concentration of SO₂ in the production environment to ensure production safety and environmental compliance.
• Flue Gas Desulfurization Systems: Used for the automatic control of flue gas desulfurization processes. By real-time monitoring of SO₂ concentration, it optimizes reaction conditions, improves desulfurization efficiency, and reduces sulfur dioxide emissions.
• Fire Rescue and Emergency Detection: Detects the concentration of SO₂ in the air at fire scenes or other emergency scenarios, providing safety guidance for rescue personnel and ensuring the smooth progress of rescue work.

Yijiajie Electronics is a full range of silicon pressure sensors from the United States, FREESCALE/, GE, MEAS, SMI, and a full range of sensing and control products from the United States pressure, temperature and humidity, gas flow, current, Hall effect, etc., Japan HAMAMATSU flame, UV sensors, photodiodes, Japan FIGARO, UK CITY, ALPHASENSE full range of semiconductors, catalytic, electrochemical gas sensors, French HUMIREL/MEAS humidity sensors and other international well-known companies authorized agents or distributors, to provide customers with product information, products Solutions, product selection, supply guarantee and logistics services, etc.