RS-485 Turbidity Probe AT-SB-PROBE-T-P
Datasheet
1. Introduction
SENSBLUE RS-485 Turbidity Probe AT-SB-PROBE-T-P is used in environmental water quality monitoring, acid/alkali/salt solutions, chemical reaction processes, and industrial production processes. It can meet the requirements of online pH measurement for most industrial applications.
2. Features
- 90° angle scattered light principle, built-in temperature sensor
- Support RS-485, Modbus/RTU protocol
- Optical fiber structure, strong resistance to external light interference
- Infrared LED light source with high stability
- IP68 protection, water depth within 20 meters
- Convenient, fast, stable and easy to maintain
3. Technical Specifications
| Model | KWS-960 | |
|---|---|---|
| Measuring Range | Turbidity PPR AT-SB-PROBE-T-P | |
| Principle | Light scattering method | |
| Range/Resolution | 0～20.00NTU | 0.01NTU/0.1℃ |
| 0～200.0NTU | 0.01NTU/0.1℃ | |
| 0～1000.0NTU | 0.1NTU/0.1℃ | |
| Precision | ±3% or ±1.5NTU(0～20.00NTU) ±3% or ±2NTU(0～200.0NTU) ±5% or ±3NTU(0～1000.0NTU) | |
| Response Time (T90) | ＜60s | |
| Lowest Detection Limit | 0.01 (0-20NTU) | |
| 0.3NTU | ||
| Calibration Mode | Two-point calibration | |
| Temperature Compensation | Automatic temperature compensation (Pt1000) | |
| Output | RS-485 (Modbus/RTU) | |
| Working Conditions | 0～50℃，<0.2MPa | |
| Storage Temperature | - 5 ～ 65 ℃ | |
| Installation | Immersion mount with 3/4NPT pipe thread | |
| Cable Length | 5 meters, other lengths can be customized | |
| Power Consumption | 0.2W@12V | |
| Power Supply | 12～24VDC | |
| Protection Grade | IP68 | |
4. Dimensions
Note: The sensor joint is M16-5 core waterproof joint male head
5. Installation and Pinouts
5.1 Installation
Installation distance requirements: keep above 5cm with side wall and above 10cm with bottom.
| Pinouts | |
|---|---|
| 1 - Pin 12-24V DC | 4 - RS485 B- |
| 2 - GND | 5 – NA |
| 3 - RS485 A+ | 6 - NA |
| 7 - NA | |
6. Maintenance
6.1 Use and maintenance
a) Maintenance schedule
The cleanliness of the measuring window is very important for maintaining accurate readings.
| Maintenance task | Recommended maintenance frequency |
|---|---|
| Calibrate sensors
(if required, by the competent authority) |
According to the maintenance schedule required by the competent department |
b) Maintenance method
- Sensor outer surface: Clean the outer surface of the sensor with tap water. If debris remains, wipe it with a soft, wet cloth. For stubborn dirt, you can add some household detergent to the tap water, but rinse thoroughly with clean water afterwards.
- Check the cable of the sensor: The cable should not be tightened while the sensor is operating, as this may cause the internal wires to break and prevent the sensor from functioning properly.
- Check the sensor’s measurement window to see if there is any dirt. Use a normal cleaning brush if there is some.
c) Matters that require attention
- The probe contains sensitive optical and electronic components. Make sure the probe is not subjected to severe mechanical impact. There are no components inside the probe that need to be maintained by the user; open it only when specifically instructed by ATRONIA, as opening it may damage the internal components.
d) Sensor’s Calibration
- Zero calibration: Take an appropriate amount of zero‑turbidity solution in a large beaker. Place the sensor vertically in the solution, ensuring that the front end of the sensor is at least 10 cm from the bottom of the beaker. Perform the zero calibration after the reading has stabilized for 3 minutes. For instructions, refer to the appendix.
- Slope calibration: Place the sensor probe in the standard solution, ensuring that the front end of the sensor is at least 10 cm from the bottom of the beaker. Perform the slope calibration after the reading has stabilized for 3 to 5 minutes. For instructions, refer to the appendix.
6.2 Frequently Asked Questions
| Problem | Probable cause | Solution |
|---|---|---|
| The operating interface cannot connect or does not display the measurement results | The measured value is too
high, too low, or the numerical value remains unstable. |
Reconnect the controller and cable |
| Cable failure | Please contact us. | |
| The measured value is too
high, too low, or the numerical value remains unstable. |
The sensor window is attached to the external object | Clean the window surface of the sensor |