RS485 Oxygen Concentration O₂ Sensor
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The RS485 Oxygen Concentration O2 Sensor continuously measures oxygen concentration, partial pressure, temperature and barometric pressure, with one-second updates and RS485 Modbus RTU connectivity for real-time monitoring.
The Seeed RS485 Oxygen Concentration O2 Sensor is a high-precision, multi-parameter sensor designed for continuous oxygen monitoring. It is widely used in HVAC, laboratories, scientific research, indoor air monitoring, and environmental monitoring.
The sensor measures oxygen concentration, oxygen partial pressure, temperature, and barometric pressure, with readings updated every second. Its non-electrochemical luminescence-quenching technology and long-life SST® O2 sensing element provide accurate and stable measurement across a 0-25% range.
For easy integration, it supports RS485 Modbus RTU communication and low-power 9-28 V DC operation, while its IP50 wall-mounted design allows for convenient installation. Built-in surge, reverse-polarity, TVS, and ESD protection further enhance reliability during long-term operation.
Features
- Comprehensive Oxygen Monitoring: Measures ambient oxygen partial pressure, oxygen concentration, temperature, and barometric pressure in one device. This provides the essential parameters required for evaluating oxygen conditions and understanding how environmental changes affect oxygen concentration.
- Configurable Measurement and Data Output: Provides both original and calibrated values for oxygen partial pressure, oxygen concentration, temperature, and barometric pressure. Configurable measurement offsets, temperature units, and floating-point byte order simplify data adjustment and ensure compatibility with different controllers and data-acquisition systems.
- Flexible RS485 System Integration: Uses RS485 Modbus-RTU for reliable long-distance communication and supports multiple sensors on one bus. Configurable device address, baud rate, parity, stop bits, and data format simplify integration with PLCs, data loggers, controllers, and monitoring systems.
- Reliable Low-Power Indoor Operation: Operates from a 9–28 V DC supply with an average current below 10 mA at 12 V DC. Its compact IP50 wall-mounted design allows for easy installation. In addition, reverse-polarity, surge, and built-in TVS/ESD protection improve reliability against wiring errors and electrical interference.
- SenseCAP S2100 Data Logger can connect to Modbus RS485/Analog/GPIO industrial sensors including the Grow Your Idea and transmit data from sensors to the LoRaWAN network. Benefiting from its high robustness and waterproof and dustproof enclosure, the S2100 data logger can work under harsh environments such as high UV exposure, heavy rain, dusty conditions, etc. which is ideal for outdoor use. Based on LoRaWAN, it can cover a long transmission range of 2km in urban scenes and 10km in line-of-sight while keeping lower power consumption. Equipped with built-in Bluetooth and app service for OTA configuration and remote management, it enables quick setup and update. It can be battery-powered or connected to a 12V external power supply. When the 12V power supply is connected, the replaceable built-in battery is set to be used as the backup power supply.
Specifications
| Sensor Description | RS485 Oxygen Concentration O2 Sensor |
| Output Interface | RS485, Modbus-RTU |
| Default Serial Communication | Slave address: 1; baud rate: 9600 bps; data bits: 8; stop bits: 1; |
| Power Supply | 9-28 V DC |
| Power Consumption | Average Current: <10mA @12V DC Measuring Current : <20mA @12V DC, measurement interval 1000ms |
| Operating Temperature | 10-45°C |
| Operating Humidity | 0-95%RH,, non-condensing |
| IP Rating | IP50 |
| Cable Length | 2 meters |
| Installation | Wall mounting |
| Dimensions | Sensor body: 111 * 25.5 mm (Length * Diameter) |
| Oxygen Partial Pressure | |
| Range | 0-300 mbar |
| Accuracy | <2% FS |
| Resolution | 0.1 mbar |
| Oxygen Concentration | |
| Range | 0-25% |
| Accuracy | Determined by the accuracy of oxygen partial pressure and barometric pressure |
| Resolution | 0.01% |
| Temperature Measurement | |
| Range | -10-60°C |
| Accuracy | ±2°C |
| Resolution | 0.1°C |
| Barometric Pressure Measurement | |
| Range | 500-1200 mbar |
| Accuracy | ±5 mbar |
| Resolution | 1 mbar |
| Supplier Code | 100046309 |
Wiring Diagram
Resources
Package Contents
- 1x RS485 Oxygen Concentration O₂ Sensor
- 1x Mounting bracket
- 2x Plastic screws
- 2x Metal screws
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