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    Formaldehyde (CH2O) Gas Sensor, RS485/TTL

    SKU: SUCH-GAS-CH2O
    $165.71
    ● Detect: Formaldehyde (CH2O) ● Rang: 0-10ppm ● Interface: RS485, TTL ● Resolution: 0.1 ppm
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    🚚 Free shipping
    🕒 Delivery date: 6-12 days
    🔁 30-day Returns
    Overview

    Professional formaldehyde gas sensors for sale, featuring high measurement accuracy and rapid response. Excellent linearity across 0-10ppm concentration range (extendable to 200ppm) with 0.1ppm resolution. Gas sensor interfaces support optional RS485/TTL connectivity, enabling seamless integration into air monitoring systems, smart devices, and environmental instruments.

    Feature

    • High-Precision Detection: The Formaldehyde (CH₂O) gas sensor measures 0-10ppm with 0.1ppm resolution, enabling users to effortlessly monitor air quality changes.
    • Rapid Response Performance: Response time ≤90s, baseline drift <1ppm, repeatability error <±2%. Swiftly captures formaldehyde concentration fluctuations, ensuring real-time accuracy and stability.
    • Multi-Interface Communication: Supports RS485 and TTL interfaces for strong compatibility, facilitating integration into diverse monitoring systems to flexibly meet varied application needs.
    • Durability and Stability: Operates reliably within -20°C to +50°C and 15-90% RH, offering rugged construction and delivering high cost-effectiveness.

    Dimension (unit: mm)

    Formaldehyde gas sensor dimension

    Electrochemical Principle

    Electrochemical principle of gas sensor

    Formaldehyde and oxygen undergo corresponding redox reactions at the working electrode and counter electrode, respectively, generating an induced current. This induced current is proportional to the concentration, thereby determining the concentration of the target gas.

    Response Recovery Curve

    Formaldehyde sensors response recovery curve

    Baseline Temperature Dependency Curve

    Formaldehyde sensor baseline temperature dependence curve

    Cross Interference

    Interference Gas Gas Concentration Used (ppm) Displayed Value (ppm CH₂O)
    CO 100 8
    H₂ 100 1.5
    H₂S 1 2
    CO₂ 5000 0
    NO₂ 10 -5
    SO₂ 10 4
    NH₃ 100 0
    Specs
    Measurement Range 0-10ppm
    Load Concentration 50ppm
    Sensitivity (20℃) 0.55±0.15μA/ppm
    Baseline Drift <1ppm
    Resolution 0.1ppm
    Response Time ≤90s
    Operating Pressure 90-110kPa
    Communication Interface (optional) RS485, TTL (optional)
    Operating Temperature -20°C~+50°C
    Operating Humidity 15~90%RH (non-condensing)  
    Repeatability <±2% of signal value per month
    Long-term Stability <2% of signal value per month
    Linearity Linearity up to 200ppm
    Service Life 2 years
    Application
    Industrial site formaldehyde detection

    Industrial Site CH2O Detection

    Smart municipal formaldehyde detection

    Smart Municipal CH2O Detection

    Renovation sector formaldehyde detections

    Renovation Sector CH2O Detection

    FAQ

    Maintaining detection accuracy requires regular gas sensor calibration and avoiding prolonged operation in high-humidity or heavily polluted environments. Additionally, pay attention to installation location—keep formaldehyde gas sensors away from windows, air vents, and direct sunlight to prevent external interference with data. Some high-end sensors feature temperature and humidity compensation, reducing errors caused by environmental fluctuations. Users should prioritize these products when purchasing to achieve more stable measurement results.

    Formaldehyde sensors generally last between 2 to 5 years, depending on sensor type and usage environment. Electrochemical sensors have relatively limited lifespans due to gradual electrolyte depletion; semiconductor sensors are more durable but susceptible to temperature and humidity fluctuations. Prolonged use in highly polluted environments may shorten sensor lifespan. Regular maintenance and proper usage extend operational cycles, ensuring reliable detection.

    Household formaldehyde sensors are typically compact, easy to operate, and feature screens or mobile app connectivity for convenient real-time data access. Industrial sensors offer higher precision and richer signal outputs—such as RS485 or TTL—enabling integration into environmental monitoring systems for large-scale air safety management in factory workshops, warehouses, or laboratories. Users should select sensor types based on their specific application scenarios.

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