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Introduction
Dissolved Oxygen Electrode is a device that is used to determine the amount of oxygen dissolved in a liquid. It consists of a sensing electrode and a reference electrode, and it works by using an electrochemical process to create a voltage that is proportional to the concentration of dissolved oxygen in the liquid. The sensing electrode is typically made of a material that can react with oxygen, such as platinum or gold. The reference electrode is used as a baseline for the voltage measurements.
When the dissolved oxygen electrode is placed in the liquid, the oxygen in the liquid reacts with the sensing electrode, creating an electrical current. This current produces a voltage between the sensing electrode and the reference electrode. The voltage is measured and is proportional to the concentration of dissolved oxygen in the liquid. Applications of dissolved oxygen electrodes include monitoring the quality of water in aquaculture, wastewater treatment, and environmental monitoring. The dissolved oxygen electrode is a critical tool in ensuring the safety and quality of liquids in various environmental and industrial applications.
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Specification
| Measurement | DO value in water |
| Measure range | 0~40.00mg/l |
| Resolution | 0.01mg/l |
| Temperature range | -20~60°C |
| Type of sensor | Galvanic Cell sensor |
| Measuring accuracy | <0.5mg/l |
| Output mode | RS485 port*1 |
| Communication protocol | Compatible with standard MODBUS-RTU protocol |
| Communication mode | RS485 9600,8,1,N (by default) |
| ID | 1~255 Default ID 01 (0x01) |
| Fixing method | RS485 remote setting calibration and parameters |
| Power supply mode | 12VDC |
| Power consumption | 30 mA @12VDC |
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Smart module communication protocol Introduction
Communication port: RS485
Port setting: 9600, N, 8, 1 (by default)
Device address: 0x01 (by default)
Protocol specifications: Modbus RTU
Commands support: 0x03 read register: 0X06 write register: 0x10 continuous write register
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Information frame format
| 0x03 read data [HEX] | ||||
| 01 | 03 | ×× ×× | ×× ×× | ×× ×× |
| Address | Function code | Data head address | Data length | Check code |
Remarks: The check code is 16CRC with low byte ahead.
| 0x10 Continuous write data [HEX] | |||
| 01 | 10 | ×× ×× | ×××× |
| Address | Function code | Data address | Register number |
| ×× | ×× ×× | ×× ×× | |
| Byte number | Write data | Check code | |
Format of register data
| Address | Data name | Switch coefficient | Status |
| 0 | Temperature | 0.1°C | R |
| 1 | DO | 0.01mg/L | R |
| 2 | Saturability | 0.1%DO | R |
| 3 | Sensor. null point | 0.1% | R |
| 4 | Sensor. slope | 0.1mV | R |
| 5 | Sensor. MV | 0.1%S | R |
| 6 | System status. 01 | Format 4*4bit 0xFFFF | R |
| 7 | System status.02 User command address | Format: 4*4bit 0xFFFF | R/W |
Remarks:Data in each address is a 16-bit signed integer, the length is 2 bytes.
The real result=Register data * switch coefficient
Status:R=only read; R/W= read/write
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