The DSP-101B is a high-tech ORP digital sensor that was made to measure the oxidation and reduction of water. parts that are very strong and precise. It is perfect for ORP monitoring in chemical solutions, swimming pool water, industrial wastewater, municipal water treatment, and more since it has a steady signal output, changes the temperature on its own, and is easy to set up and keep up. It gives you exact information on how to follow the oxidation-reduction cycle of the water quality.
★★★★★
Parameters
| Item | Specification |
|---|---|
| Measuring Range | -1999~1999MV |
| Resolution | 1MV |
| Calibration Method | One-point Calibration |
| Temperature Compensation | Automatic Temperature Compensation (PT1000) |
| Operating Temperature | 0-50℃ |
| Working Pressure | ＜0.2MPa |
| Power Supply | 24VDC |
| Signal Output | RS485(Modbus/RTU) + 4-20mA |
| Installation Interface | 3/4″ G Thread |
| Cable Length | 5m standard, other lengths customizable |
| Communication Protocol | Modbus RTU |
| Default Communication Parameters | 9600 N 8 1 |
| Address Range | 1-255 (Modifiable via broadcast address 255) |
| Functional Codes Supported | 0x03 (Read data), 0x06 (Modify parameters) |
| Power Supply Range (Optional) | 9-24VDC |
Why choose DSP-101B digital sensor?
- High precision measurement: 1mV high resolution, one point calibration mode, precise capture of ORP values, reflecting the true state of water quality oxidation-reduction
- Intelligent temperature compensation: Built in PT1000 thermistor, automatic temperature compensation, offsets the interference of temperature on measurement, and ensures more stable data
- Dual signal output: RS485 (Modbus/RTU)+4-20mA dual signal, compatible with industrial automation systems and conventional display instruments, with strong adaptability
- Standardized installation: 3/4 “G-threaded universal interface, easy to install, suitable for various water treatment pipelines and equipment
- Industrial grade protection: able to withstand working temperatures of 0-50 ℃ and working pressures of less than 0.2MPa, suitable for complex working conditions in industrial sites
Featured Applications
- Industrial wastewater: ORP testing for chemical, electroplating, and printing and dyeing wastewater, guiding the addition of chemicals and process adjustments
- Civil water quality: monitoring of redox balance in swimming pool, landscape water, and drinking water supply pipelines
- Chemical production: online control of oxidation-reduction status of chemical solutions and process water
- Aquaculture: Real time monitoring of ORP in aquaculture water bodies to ensure ecological balance of water bodies
Installation and wiring
Installation requirements
- 3/4 “G thread interface, directly connected to pipelines/equipment, firmly installed and anti loose
- The probe is completely submerged in the water being measured, avoiding areas with dense bubbles, impurities, and strong electromagnetic interference sources
- Suggest installing in areas with gentle water flow, separating wiring from power lines to reduce signal interference
Electrical wiring (four wire system, color coded)
| Wire Color | Definition | Description |
|---|---|---|
| Red | V+ | 24VDC Power Positive |
| Black | V- | 24VDC Power Negative/GND |
| White | A | RS485A Signal Terminal |
| Blue | B | RS485B Signal Terminal |
| Extension Wire | 4-20mA | 4-20mA Analog Output |
After the wiring is completed, it is necessary to carefully check to confirm that there is no reverse or virtual connection, in order to avoid damaging the sensor after power on; Keep the wiring connections dry to prevent moisture.
Maintenance and Care
Calibration Specification
- Using one point calibration, factory pre calibration, no calibration required for non measurement errors exceeding the range
- During calibration, immerse the probe in a standard ORP buffer and send a Modbus calibration command after the value stabilizes
- After calibration, rinse the probe with distilled water, dry it, and put it into use
Routine Maintenance
- Regularly wipe the probe attachment with a soft damp cloth, and prohibit scratching the detection surface with hard objects
- When the probe scales, gently wash it with dilute hydrochloric acid and rinse it with distilled water to avoid residual reagents affecting the measurement
- When idle for a long time, the probe should be cleaned and soaked in a special protective solution, sealed and stored to prevent aging
- Regularly check the sealing of cables and joints to prevent abnormal signals caused by water ingress and corrosion
Technical Support
Top 6 Industrial Gas Analyzers Manufacturers 2025
6 Best Industrial Gas Detector Manufacturers in the World
9 Best Portable Carbon Dioxide Detector 2025 – Complete Buying Guide
Top 7 portable combustion analyzer Tested
The DSP-101B is a high-tech ORP sensor that makes industrial ORP monitoring less expensive. It can discover minor variations in ORP and delivers accurate, real-time information for controlling water quality and making modifications to processes in municipal water treatment, industrial wastewater management, swimming pool water, and aquaculture water quality tracking. The DSP-101B is the ideal option for keeping an eye on water quality safety without having to worry about it because it has the best sensor technology, performs well, and is extremely cheap.
Request a Quote
