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    Formaldehyde (CH2O) Gas Sensor, 0-10ppm

    $165.71
    ATO formaldehyde (CH2O) gas sensor, now on sale, offers precise detection with a 50 ppm load concentration and 0.55 ± 0.15 μA/ppm sensitivity at 20°C. Engineered for stability with <1 ppm baseline drift and 0.1 ppm resolution, it operates from -20°C to +50°C, ideal for home environmental monitoring and industrial safety. Act now to secure this high-quality CH2O sensor at a competitive price.
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    SKU: ATO-FGS-CH2O
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    This formaldehyde sensor is designed to meet a range of specifications and is available with or without a module. The module offers RS485 or TTL communication interface options, allowing customers to select the best fit for their needs.

    Features

    • Engineered in accordance with electrochemical principles, it is more compact and precise than comparable items on the market.
    • The use of high-precision, dense integrated circuits ensures the reliable, interference-free processing of signals, offering enhanced stability.
    • It is designed with anti-interference, short circuit, and reverse polarity protection.High-sensitivity gas detection probe with stable signal and high accuracy.

    Specification

    Model ATO-S4-CH2O
    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℃~+50℃
    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


    Cross-Interference Gas Table

    Interfering Gas Concentration (ppm) Output Signal (μA)
    Carbon Monoxide (CO) 50 0.6 
    Ethanol (C2H5OH) 2000 0.2
    Acetic Acid (CH3COOH) 2000 -0.3
    Ethylene (C2H4) 100 0.6
    Methanol (CH3OH) 100 0.3
    Isopropylene (C3H6) 100 0.2


    Dimension (unit: mm)

    CH2O gas sensor dimension

    Basic Test Circuit

    CH2O gas sensor basic test circuit

    Application

    CH2O gas sensor applications

    Tips:6 precautions when using CH2O gas sensors

    1. The CH2O gas sensor pins must be connected through a PCB socket and should not be bent; soldering may cause damage.
    2. When storing the sensor, the working electrode and the reference electrode should be in a short-circuited state.
    3. The sensor should be kept away from organic solvents, alcohol, paints, oils, and high-concentration gases, including silicone and other adhesives.
    4. The sensor should not be used for extended periods in environments containing corrosive gases.
    5. Calibration with the target gas is recommended; cross-sensitivity may vary by up to 30%. Calibration with cross-sensitive gases (e.g. carbon monoxide, acetic acid, ethylene, methanol, etc.) does not guarantee measurement accuracy.
    6. It is not advised to test the formaldehyde gas sensor using non-standard methods, such as submerging it in concentrated ammonia, spraying smoke towards the sensor, or bringing the sensor close to alcohol.
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