ZE25‑O3 Electrochemical Ozone Sensor Module 🧪

The ZE25‑O3 is a compact, general‑purpose electrochemical ozone (O₃) sensor module designed to reliably detect ozone concentration in ambient air. Leveraging a three‑electrode electrochemical cell with integrated temperature compensation, it delivers high selectivity, excellent stability, and consistent linearity. Dual interfaces—UART (3.0 V level) and analog voltage output—make it easy to integrate with Arduino, Raspberry Pi, ESP32, and other microcontroller platforms commonly used by electronics engineers and hobbyists.

Why choose this module? 🌟

• High sensitivity and resolution for low‑level O₃ detection
• Low power consumption ideal for embedded and battery‑powered designs
• Long service life with stable electrochemical performance
• Two output methods: UART digital output and analog voltage signal
• High stability with excellent anti‑interference characteristics
• Built‑in temperature compensation for improved accuracy
• Excellent linear output across the specified measurement span

Technical Specifications 📐

• Detection Gas: O₃ (ozone)
• Interfering Gas: gases such as alcohol
• Output Data:
  Analog (DAC): concentration proportional to voltage 0.4–2.0 V corresponding to 0–4.10 ppm
  UART: digital output, 3.0 V level

• Operating Voltage: 3.7–5.5 V (note: no reverse-voltage protection)
• Warm‑up Time: ≤ 3 minutes
• Response Time (T90): ≤ 90 seconds
• Recovery Time: ≤ 90 seconds
• Measurement Range: 0–10 ppm
• Resolution: 0.01 ppm
• Operating Temperature: −10°C to 55°C
• Operating Humidity: 15% RH to 90% RH (non‑condensing)
• Storage Temperature: −20°C to 55°C

Integration Notes 🔧

• Microcontroller compatibility: Works with Arduino, Raspberry Pi, ESP32, and similar platforms via UART or analog input.
• Logic levels: UART is 3.0 V TTL. Use a level shifter when interfacing with 5 V UART devices (e.g., some Arduino boards).
• Analog measurement: Map the 0.4–2.0 V analog output to 0–4.10 ppm as specified; plan for saturation behavior beyond this analog span if using the 0–10 ppm range.
• Power supply: Provide a clean 3.7–5.5 V supply; observe polarity as there is no reverse‑voltage protection.
• Warm‑up: Allow up to 3 minutes for stabilization before taking measurements.

Typical Applications 🌫️

• Indoor air quality and environmental monitoring
• Ozone leak detection in labs and industrial settings
• Air purifier and sterilization system control
• Smart home and building automation projects
• STEM education, prototyping, and IoT modules

Engineer’s Tips ✅

• Maintain non‑condensing humidity for reliable readings.
• Shield from strong solvent vapors (e.g., alcohols) that may cause interference.
• Calibrate and validate in your target environment for best accuracy.