Search store Close
Shopping cart Close

You have no items in your shopping cart.

All Categories
    Menu Close
    Find a Sensor A - Z
    Picture of Oxygen (O2) Gas Sensor, 0~100% Linear Output Picture of Oxygen (O2) Gas Sensor, 0~100% Linear Output Picture of Oxygen (O2) Gas Sensor, 0~100% Linear Output Picture of Oxygen (O2) Gas Sensor, 0~100% Linear Output

    Oxygen (O2) Gas Sensor, 0~100% Linear Output

    1 review(s) | Add your review
    SKU: SUCH-O2S-02
    $66.86
    ● 0–100% oxygen gas sensor with linear output ● Shared-voltage electrochemical O2 detection technology ● 9–13mV air output with Molex 3-pin interface ● Suitable for ventilators, gas analyzers and monitoring instruments
    🚚 Free shipping
    🕒 Delivery date: 6-12 days
    🔁 30-day Returns
    Overview

    This O2 gas sensor is a compact oxygen sensing element for measuring oxygen levels in gas environments. It uses electrochemical detection technology with a Molex 3-pin interface, fast T90 <15s response time, and durable red ABS housing for easy device integration. Suitable for oxygen analyzers, gas detection instruments, industrial safety systems, laboratory testing equipment, and environmental protection applications.

    Feature

    O2 gas sensor feature

    • SUCH oxygen gas sensors feature full-range 0-100% linear output, professionally calibrated and temperature-compensated at the factory.
    • The oxygen sensor is an electrochemical sensor designed to detect oxygen concentration. Featuring a Molex 3-pin connector and a molded body design, it offers rapid response and extended service life.
    • Operating without an external power source, this oxygen sensor is suitable for various instruments requiring oxygen concentration monitoring. It finds extensive application in automotive, environmental protection, coal mining, petrochemical, and other industries.

    Dimension (unit: mm)

    O2 gas sensor dimension

    Application Circuit Diagram

    O2 gas sensor application circuit diagram

    • Short-circuit the positive and negative terminals (Vsensor+ and Vsensor-) of the oxygen gas sensor. The ADC value (MCU−ADC) read at this point is recorded as A0.
    • Place the gas sensor in air. The ADC value read at this point is recorded as A1.
    • Next, place the sensor in the target environment. The ADC value read at this point is recorded as Ax.
    • The formula for calculating oxygen concentration in the target environment is: Oxygen Concentration = (Ax - A0) × 20.9÷(A1 - A0) × 100%

    Pin Definition

    O2 gas sensor pin definition
    Pin Definition
    1 Positive Pin
    2 Negative Pin
    3 Negative Pin
    Specs
    Working Principle Shared-voltage electrochemical
    Output Voltage 9–13 mV (in air)
    Measurement Range 0–100%
    Response Time T₉₀<15 s
    Linearity Full-range linearity
    Temperature Compensation <2% O₂ equivalent (0–40°C)
    Load Resistance ≥10 kΩ
    Interface Molex 3-pin connector (2.54 mm)
    Operating Temperature Range 0–50°C
    Operating Pressure Range 0.5–2.0bar
    Operating Humidity Range 0–99%RH (non-condensing)
    Long-Term Drift in 100% O₂ Environment <10% (voltage decay/year)
    Service Life 3.6×10⁵ %O₂ hours (20°C)
    2.86×10⁵ %O₂ hours (40°C)
    Housing Material Red ABS
    Weight Approx. 40g
    Application
    O2 gas sensor of automotive emissions testing

    Automotive Emissions Testing

    O2 gas sensor of waste gas emission testing

    Waste Gas Emission Testing

    O2 gas sensor of oxygen index testing

    Oxygen Index Testing

    FAQ
    ❯

    Oxygen is one of the essential elements for life, but higher concentrations aren't necessarily better. Normal human oxygen intake typically ranges between 20% and 30%. Exceeding this range can easily lead to oxygen poisoning.

    ❯

    Oxygen sensors are crucial tools for measuring oxygen concentration. Common types include electrochemical oxygen sensors, fluorescent oxygen sensors, and zirconia oxygen sensors. Each possesses distinct characteristics suited for different applications.

    ❯

    During storage, installation, and operation, oxygen sensors must be shielded from exposure to high concentrations of organic solvent vapors. When using oxygen sensors with printed circuit boards (PCBs), clean the PCB with a degreaser before sensor installation to prevent volatilized flux residues like rosin from condensing and clogging the oxygen sensor's permeable membrane. Never apply organic solvents to the sensor housing, as they may cause plastic cracking.

    1 review(s)
    5.0 1
    Write your own review Close
    *
    *
    Jason Morgan | 7/7/2026 9:44 AM
    o2 gas sensor reliable for air monitoring
    bought an O2 Gas Sensor for an indoor air monitoring project in a small workshop. installation was pretty straightforward, just connected it to the controller and checked the output. the O2 Gas Sensor responds steadily during normal tests and the readings stay consistent. had to do a little calibration at first, but after that it’s been working fine for routine oxygen level checks.
    Related products

    Electrochemical O2 Sensor, 0~25% Vol, TTL/RS485

    ● 0~25%Vol electrochemical oxygen sensor ● Dual-electrode design for stable O2 measurement ● Optional TTL/RS485 module, easy to connect ● Reliable O2 detection in industrial and medical systems
    $91.59

    Fluorescent Oxygen Sensor, 0-25%/0-300mbar/500-1200mbar

    ● Fluorescent oxygen sensor with 0–25% O2 range ● Optical sensing design for stable, low-drift measurement ● Built-in pressure readings from 500–1200mbar ● 5V low-power UART output for O2 monitoring devices
    $100.31

    High Pressure Oxygen Sensor, 0-100% Linear, 3 Pin Interface

    ● High pressure oxygen sensor for O2 monitoring ● 0–100% linear output with electrochemical sensing ● 0.8–7.0 bar pressure range and T90<10s response ● Molex 3-pin interface for stable signal connection
    $211.42

    Ultrasonic Oxygen Flow Sensor, 0-15L/min, 21-95.6%

    ● Detect: Oxygen (O2) ● Concentration: 21-95.6% ● Flow: 0 to 15 L/min ● Serial port UART/9600 bps
    $49.87

    Ultrasonic Oxygen Sensor, 21-95.6%, Long/Short Type

    ● Detect: Oxygen (O2) ● Concentration: 21-95.6% ● Flow: 0 to 10 L/min ● Long/short type optional
    $48.99

    Oxygen Gas Transmitter with Display, 0-30%Vol/0-25%Vol

    ● Oxygen gas transmitter with OLED display ● 0-25%Vol / 0-30%Vol range for O2 monitoring ● RS485, 4-20mA, 0-5V and 0-10V outputs ● Fast detection in warehouses, farms and food storage
    $117.58
    Information
    Customer service
    Payment options
    Copyright © 2026 SUCH.com. All rights reserved.