Product Description:

YJJ A3EF A3E/F AB005-D09 Filter Carbon Monoxide 0-2000PPM Gas Sensor Electrode Sensor

Features:

A3EF is an electrochemical carbon monoxide (CO) gas sensor of the CITY Technology brand. Its core function is to serve as the core sensing element for industrial safety monitoring and fixed gas detection equipment. Here are its detailed parameters and key information:

1. Core Technical Parameters

Detection Target: Carbon Monoxide (CO), with hydrogen gas (H₂) cross-interference compensation function.

Measurement Range: Standard range 0~2000 ppm, maximum overload concentration 4000 ppm (short-term tolerance).

Resolution: 1 ppm (minimum detectable concentration change).

Output Signal: 75 ± 25 nA/ppm (equivalent to 0.075 ± 0.025 μA/ppm), output shows a linear relationship.

Response Time: T90 < 40 seconds (time for the signal to reach 90% of the stable value after a concentration change).

Baseline Range: In a pure air environment, the baseline equivalent value is -2 ~ +17 ppm, with excellent zero-point stability.

Accuracy Related:

Repeatability: ±2% of the signal (consistency of multiple measurements);

Long-term Drift: Annual signal loss < 10% (stability performance).

Operating Voltage: Bias voltage selectable 20 mV or +250 mV, recommended gain range 0.5~2.5.

2. Environmental Adaptation Parameters

Temperature Range: Working temperature -20℃ ~ +50℃, meeting the needs of most industrial and outdoor scenarios.

Humidity Range: 15% ~ 90% RH (non-condensing), avoiding the impact of condensation on performance.

Pressure Range: Working and storage pressure both 800~1200 mbar (approximately equivalent to 0.8~1.2 atmospheres);

Maximum Pressure Difference (capillary and environment): ±100 mbar;

Pressure Coefficient: 0.02% signal / mbar (the impact of pressure change on measurement is small).

3. Physical and Structural Parameters

Size Specification: Belongs to the CITY standard 3 series size (industry-standard compatible specifications).

Weight: 26 g (lightweight design, facilitating integration into portable or fixed detection equipment).

Built-in Filtration: Equipped with acidic gas/alcohol filtration device, and compensates for H₂ interference through auxiliary electrodes, improving detection accuracy in complex environments.

Electrode Structure: Four-electrode design (including auxiliary compensation electrode), optimizing anti-interference ability and long-term stability.

4. Lifespan and Storage

Expected Working Life: Airborne lifespan > 3 years (conventional usage environment).

Storage Conditions: Requires storage in an environment of 800~1200 mbar pressure, sealed and dry, avoiding exposure to high temperature and high humidity.

5. Product Features and Applications

Core Advantages: Linear output characteristic, H₂ interference compensation, built-in acidic gas filtration, suitable for complex industrial environments;

Compatible Equipment: Can be integrated into fixed gas detectors, portable CO alarms, industrial safety monitoring systems, supporting the use of 4-20 mA transducer or mV output board;

Typical Applications: Industrial workshop ventilation safety monitoring, gas equipment leakage warning, CO concentration detection in underground spaces (such as mines, tunnels), emissions monitoring, etc.

Specifications: