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Seeed Studio RS485-H2S MODBUS Dissolved Oxygen Sensor


RS485 Modbus Dissolved Oxygen Sensor is based on the fluorescence quenching method, which can quickly measure dissolved oxygen in water, it has a built-in temperature sensor and salinity compensation to make the measurement more accurate. It has a long service life due to its unmatched chemical and abrasion resistance. And the sensor will not be affected by flow rate and chemical substances, resists interference from complex environments, and can be used in various scenarios such as aquaculture and wastewater treatment with simple deployment.

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Key Features:

  • Measuring ranges: 0~20mg/L or 0-200% saturation
  • Temperature compensation/salinity compensation: Makes the measurement more accurate
  • No electrolyte storage, easy maintenance
  • Fluorescence method principle
  • No oxygen consumption
  • Anti-interference: No interference from chemicals such as sulfides.


Measurement Range 0~20.00mg/L(0~200% saturation,25℃)
Accuracy ±2%F.S.,±0.3℃
Resolution 0.01mg/L,0.1℃
Calibration Two-point calibration
Temperature Compensation Automatic temperature compensation (Pt1000)
Output RS485(Modbus/RTU)
Working Conditions 0~50℃,<0.2MPa
Storage Temperature -5~65℃
Material PC, stainless steel
Cable Length 5 meters
Power Consumption 0.3W@12V
Power Supply 12~24VDC(@typical 12VDC)
IP Rating IP68
Product Details
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