Table of Contents:

• 1. DR-ECK Water EC Probe
  • 1.1 Specification:
  • 1.2 Application for Different Range
  • 1.3 Wiring
  • 1.4 Mechinical Drawing
  • 1.5 Installation
  • 1.6 Maintain
  • 1.7 RS485 Commands
    • 1.7.1 Query data
    • 1.7.2 Calibration Method
• 2. DR-PH01 Water PH Sensor
  • 2.7 RS485 Commands
• 3. DR-ORP1 Water ORP Sensor
  • 3.7 RS485 Commands
• 4. DR-DO1 Dissolved Oxygen Sensor
  • 4.7 RS485 Commands
• 5. DR-TS1 Water Turbidity Sensor
  • 5.7 RS485 Commands

1. DR-ECK Water EC Probe

1.1 Specification:

• Power Input: DC7~30
• Power Consumption : < 0.5W
• Interface: RS485. 9600 Baud Rate
• EC Range & Resolution:
  • ECK0.01 : 0.02 ~ 20 μS/cm
  • ECK0.1: 0.2 ~ 200.0 μS/cm
  • ECK1.0 : 2 ~ 2,000 μS/cm  Resolution: 1 μS/cm
  • ECK10.0 : 20 ~ 20,000 μS/cm  Resolution: 10 μS/cm
• EC Accuracy: ±1% FS
• Temperature Measure Range: -20 ~ 60 °C
• Temperature Accuracy: ±0.5 °C
• IP Rated: IP68
• Max Pressure: 0.6MPa

1.2 Application for Different Range

1.3 Wiring

1.4 Mechinical Drawing

1.5 Installation

1.6 Maintain

1.7 RS485 Commands

1.7.1 Query data

The address of the EC K10 sensor is 11

The query data command is 11 03 00 00 00 02 C6 9B

For example, the returned data is 11 03 04 02 AE 01 64 8B D0. 02 AE is converted to decimal 686,  K=10, EC: 6860uS/cm

The address of the EC K1 sensor is 12

The query data command is 12 03 00 00 00 02 C6 A8

For example, the returned data is 12 03 04 02 AE 01 64 B8 D0. 02 AE is converted to decimal 686,   K=1, EC: 686uS/cm.

1.7.2 Calibration Method

This device uses one-point calibration, and you need to prepare a known E standard solution. When mileage K=1, 1~2000 uses 1413uS/cm standard solution, and when mileage K=10, 10~20000 uses 12.88mS/cm standard solution. The calibration steps are as follows:
(1) Place the electrode in distilled water and clean it. When mileage 1~2000 uses 1413HS/cm standard solution, enter the following calibration command after the data is stable.

return

(2) Place the electrode in distilled water to clean it. Use 12.88mS/cm standard solution for the range of 10~20000. After the data is stable, enter the following calibration command

Return

2. DR-PH01 Water PH Sensor

2.7 RS485 Commands

The address of the pH  sensor is 10

The query data command is 10 03 00 00 00 01 87 4B. After the query, 7 bytes will be returned.

For example, the returned data is 10 03 02 02 AE C4 9B.

02 AE is the pH value, which is converted into decimal to get 686, and then two decimal places are added to get the actual value. 02 AE means the current pH value is 6.86.

3. DR-ORP1 Water ORP Sensor

3.7 RS485 Commands

The address of the ORP sensor is 13

The query data command is 13 03 00 00 00 01 87 78

For example, the returned data is 13 03 02 02 AE 80 9B.

02 AE is the ORP value, converted to decimal, the actual value is 686, 02 AE means the current ORP value is 686mV

4. DR-DO1 Dissolved Oxygen Sensor

4.7 RS485 Commands

The address of the dissolved oxygen sensor is 14

The query data command is 14 03 00 14 00 01 C6 CB

After the query, 7 bytes will be returned. For example, the returned data is 14 03 02 03 78 B5 55. 03 78 is the value of dissolved oxygen.

Converted to decimal, it is 888. Add two decimal places to get the actual value. 03 78 means the current dissolved oxygen is 8.88mg/L

5. DR-TS1 Water Turbidity Sensor

5.7 RS485 Commands

The address of the dissolved oxygen sensor is 15

The query data command is 15 03 00 00 00 01 87 1E

For example, the returned data is 15 03 02 02 9A 09 4C

02 9A is the turbidity value, converted to decimal, it is 666, and then divided by 10, the actual value is 66.6, 02 9A means the current turbidity value is 66.6 NTU