Winsen ZE03-O₂
An electrochemical oxygen sensing module in the Winsen ZE03 family, combining a three-electrode sensor, signal processing, and temperature compensation for oxygen concentration monitoring and gas detection equipment.
Technical Specifications
Typical Applications
Portable and fixed oxygen detection equipment, industrial gas monitoring, and oxygen concentration measurement systems.
Official Manufacturer Resources
Review the latest manufacturer product details and ZE03 manual before integrating this module.
AirAlign is an independent informational resource and is not affiliated with the manufacturer. Specifications may change; current manufacturer documentation remains authoritative.
ZE03-O₂ — volume percent and host signal
ZE03-O₂ is an electrochemical oxygen module with conditioning electronics and UART/analog outputs in the listed family. The recorded nominal 0–25% volume measuring span serves oxygen-rich/depleted air assessment, not a CO₂ ppm reading. The receiving host must handle electrode ageing, fresh-air or maker-prescribed calibration, warm-up and sensor-fault conditions. Confirm supplied output mode and calibration at ambient pressure, humidity and temperature; a bare ZE03 sensing module is not a fully certified confined-space safety alarm.
ZE03-O₂: gas-specific output and UART engineering
The ZE03 family combines an electrochemical sensing cell with a microcontroller and temperature compensation. The original manufacturer’s ZE03 v2.5 manual (2018) records oxygen-specific values that cannot be copied across ZE03 CO, NO₂ and other gas variants. Confirm newer shipment-specific calibration with Winsen.
| O₂ variant parameter | OEM documentation | Integration caution |
|---|---|---|
| Gas range and resolution | 0–25% volume oxygen; 0.1 vol% resolution (ZE03 v2.5 manual) | 0.1% volume resolution is 1,000 ppm gas fraction, not 0.1 ppm. |
| Response time T90 | ≤15 s in the 2018 oxygen row | Cell age, sampling inlet and test conditions can change actual installed-system latency. |
| UART voltage and framing | 3 V TTL-level serial logic, 9600 baud, 8 data bits, no parity, one stop bit; default active reporting each second | Use logic-level serial input; 3 V TTL UART does not equal RS-232/RS-485 or Modbus RTU. |
| Analog VO polarity | Older v2.5 O₂ variant lists approximately 1.5 V at 0 vol% and a non-universal output towards 0 V at 25 vol% | Winsen explicitly states that the actual top-end voltage depends on the supplied inspection report; do not hard-code 0 V as the 25% endpoint. |
| DC supply and service | 5 ±0.1 V, <5 mA; nominal 2-year working life; 23.5 mm diameter × 24.5 mm module (current Winsen model page) | Plan end-of-life diagnostics and prescribed oxygen span/zero calibration, not just an arbitrary fixed ppm correction. |
Practical commissioning sequence
Read the label and detection-range suffix, check the supplied report for analog zero/span calibration, and select active UART streaming or request/answer mode. A generic 3 V TTL receiver must handle checksums and gas-specific engineering units. Establish a realistic atmospheric O₂ reference and avoid assuming that a 0–25 vol% cell alone provides safety-compliant oxygen-deficiency alarms or medical-grade oxygen monitoring.
Official Winsen sources: ZE03-O₂ model catalogue; ZE03 electrochemical user manual v2.5 (March 2018), pp. 3–4.