Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Detection Principle	Electrochemical
Measurement Range	0-25% VOL
Resolution	0.1% VOL
Accuracy	±3% F.S.
Response Time	≤30 seconds
Communication Interface	TTL / RS485 (Modbus)
Operating Voltage	DC 5V - 24V
Sensor Lifespan	2 years in air
Operating Temperature	-20°C to 50°C
Dimensions	45mm x 30mm x 15mm

6 reviews

Anonymous

Mar 31, 2026

Rating: 4/5

Reliable but needs calibration check

Solid build quality and the housing protects the sensor well. We recommend performing a fresh air calibration upon receipt. Once calibrated, it has been running continuously for three months without drift issues.

Anonymous

Mar 28, 2026

Rating: 5/5

Excellent Modbus implementation

The Modbus register map is standard and easy to implement in SCADA systems. Response time is quick enough for real-time alarms. Very satisfied with the consistency across the batch we ordered.

Anonymous

Mar 14, 2026

Rating: 4/5

Good value, accurate enough for general use

We purchased five units for our ventilation testing rigs. They perform well in standard atmospheric conditions. The TTL output is convenient for direct microcontroller integration. Just ensure you allow the warm-up time specified in the manual.

Anonymous

Mar 10, 2026

Rating: 3/5

Works well but documentation could be better

The sensor itself is accurate, but the pinout diagram in the datasheet was slightly unclear regarding the voltage selection jumper. After contacting support, I got it working. Would give 5 stars if the manual was more detailed.

Anonymous

Mar 09, 2026

Rating: 5/5

Easy to integrate with Arduino

I used the UART mode to connect this to an ESP32. The data stream is clean and easy to parse. It correctly identifies normal oxygen levels around 20.9%. Great module for safety monitoring projects.

Anonymous

Mar 08, 2026

Rating: 5/5

Perfect for my greenhouse monitoring system

The RS485 communication works flawlessly with my PLC. The readings are stable and match my calibrated reference meter within the stated accuracy. Setup was straightforward using the provided protocol documentation.

5 FAQ

Q: Can this sensor detect oxygen levels below 19.5% for confined space entry alerts?

A: Yes, the module measures from 0% to 25% VOL. It is suitable for detecting oxygen deficiency environments, but please note it is a monitoring component and should be integrated into a certified safety alarm system for critical applications.

Q: What is the default baud rate for the serial communication?

A: The default baud rate is 9600 bps, 8 data bits, no parity, and 1 stop bit. This can be modified via command if your system requires a different speed, as detailed in the communication protocol manual.

Q: Does this come with the connecting cables or just the board?

A: The package includes the sensor module only. Connection wires for VCC, GND, TX, and RX are not included, allowing you to customize the cable length for your specific installation needs.

Q: Is this module waterproof for outdoor installation?

A: The module itself is not waterproof. It should be installed inside an IP-rated enclosure if used outdoors or in humid environments to protect the electronics and ensure accurate readings.

Q: How often does the electrochemical sensor need replacement?

A: Under normal atmospheric conditions, the sensor lifespan is approximately 2 years. In environments with extreme temperatures or contaminants, the lifespan may be shorter. The module design allows for easy sensor replacement.

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