SIN-DO7013 Electrochemical dissolved oxygen sensor

Range: 0-20mg/L

Resolution: 0.01mg/L

Output signal: RS485

Communication protocol: MODBUS-RTU

  • 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.

  • 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
  • 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

 

  • 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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Sinomeasure Automation

Sinomeasure is committed to industrial process automation sensors and instrument since its establishment for decades. The main products are water analysis instrument, recorder, pressure transmitter, flowmeter and other field instruments.