- Multi-parameter Water Analyzer
- Single-Parameter Water Aalyzer
- DO Sensor
- Trace DO Sensor
- CO₂ Sensor
- COD Sensor
- EC TDS Sensor
- Salinity EC TDS Sensor
- TSS Sensor
- Turbidity Sensor
- PH Sensor
- ORP
- Ion Selective Sensor
- Ammonia Nitrogen Sensor
- Oil in Water Sensor
- Blue-Green Algae Sensor
- Chlorophyll Sensor
- Residual Chlorine Sensor
- Marine Current Sensor
0102030405
High-Precision RS485 pH Sensor for Water Quality Monitoring - Reliable China Suppliers & Factory Solution
Product Parameters
| Product Name | PH Sensor |
| Range | 0-14 PH |
| Accuracy | ±0.02 PH |
| Power | DC 9-24V, current <50 mA |
| Material | Polymer Plastic |
| Size | 31mm × 140mm |
| Output | RS-485, MODBUS Protocol |
Product Features
⚡
① Isolated Power Supply & Anti-Interference
The sensor's isolated power design minimizes electrical noise, ensuring stable data transmission in environments with strong electromagnetic interference.
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② Dual Temperature Compensation
Supports automatic or manual temperature compensation to maintain accuracy across varying operating conditions (0–60°C).
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③ Multi-Calibration Compatibility
Calibrate effortlessly using USA, NIST, or custom pH/ORP solutions for tailored measurement scenarios.
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④ Flat Bubble Structure
The smooth, flat surface prevents air bubble accumulation and simplifies cleaning, reducing maintenance downtime.
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⑤ Ceramic Sand Core Liquid Junction
A single salt bridge with a ceramic sand core ensures consistent electrolyte flow and long-term measurement stability.
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⑥ Compact & Durable Design
Constructed from corrosion-resistant polymer plastic, the sensor withstands harsh chemicals and physical stress while occupying minimal space.
Application
1
Water Treatment Plants
Monitor pH levels in real time to optimize neutralization, coagulation, and disinfection processes.
2
Environmental Monitoring
Deploy in rivers, lakes, or reservoirs to track acidity changes caused by pollution or natural factors.
3
Aquaculture Systems
Maintain optimal pH for aquatic life health and prevent stress or mortality in fish and shrimp farms.
4
Industrial Process Control
Integrate into chemical manufacturing, pharmaceuticals, or food production to ensure compliance with quality standards.
5
Laboratory Research
Deliver precise pH data for scientific studies on water chemistry, soil analysis, or biological systems.
6
Hydroponics & Agriculture
Manage nutrient solutions and irrigation water to enhance crop growth and yield.
Digital RS485 Water Quality Sensors Technical Data
| Parameter | Model | Range | Accuracy |
| DO sensor | LMS-DO10B | 0-20mg/L, 0-60℃ | ±0.1-0.3mg/L |
| DO sensor | LMS-DO10C | 0-20mg/L, 0-60℃ | ±0.3mg/L |
| Trace DO sensor | LMS-TDO100 | 0-2000ppb, 0-50℃ | ±1ppb |
| PH sensor | LMS-PH100 | 0-14pH | ±0.02pH |
| ORP sensor | LMS-ORP100 | ±1000.0 mV | ±0.2 mV |
| EC/TDS sensor | LMS-TDS102 | CT: 0-9999uS/cm; 0-100mS/cm; TDS: 0-10000ppm |
±2.5%FS |
| Salinity/EC/TDS sensor | LMS-SAL104 | Conductivity: 0.1-500 mS/cm TDS: 0-60000ppm Salinity: 0-500.00ppt |
±1.5%FS |
| COD sensor | LMS-COD100 | COD: 0.1-1500mg/L TOC: 0.1-750mg/L BOD: 0.1-900mg/L Turbidity: 0.1-4000NTU Temperature: 0-50℃ |
±5% equiv.KHP Temperature: ±0.5℃ |
| TSS sensor | LMS-TSS100 | 0-50000mg/L / 0-120000mg/L | ±10%FS or 10 mg/L |
| Turbidity sensor | LMS-TUR10L | 0-100NTU | ±10%FS or 0.3 NTU |
| Turbidity sensor | LMS-TUR10H | 0-3000NTU | ±10%FS or 0.3 NTU |
| CO2 sensor | LMS-CO2100 | 2000PPM / 10000PPM / 50000PPM | ±5%FS |
| Ammonia Nitrogen sensor | LMS-NH4100 | 0-1000 mg/L | ±5%FS |
| Ion Selective sensor | LMS-ION100 | 0-1000 mg/L | ±5%FS |
| Oil in Water sensor | LMS-OIL100 | 0-50 mg/L; 0-5 mg/L | ±3%FS |
| Chlorophyll sensor | LMS-CHL100 | 0-500ug/L | ±3%FS |
| Blue-Green Algae sensor | LMS-BGA100 | 0-2000,000 cells/ml | ±3%FS |
| Residual Chlorine sensor | LMS-HCLO100 | 0-20.00 ppm | ±5%FS |
| Marine Current sensor | LMS-Current100 | Temperature: -3℃ - 45℃ Velocity of flow: 0-500 cm/s Flow direction: 0-359.9° |
±0.05℃ ±1 cm/s or ±2% ±2° |
Frequently Asked Questions (FAQ)
Q
What is the measurement range and accuracy of this PH sensor?The PH sensor covers a full range of 0–14 pH with a high accuracy of ±0.02 pH, making it suitable for both acidic and alkaline environments across a wide variety of industrial and scientific applications.
Q
What communication protocol does the PH sensor use?The sensor outputs data via RS-485 interface using the MODBUS protocol, which allows easy integration with PLCs, data loggers, and SCADA systems over long cable runs with excellent noise immunity.
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Does the sensor support temperature compensation?Yes. The sensor supports both automatic and manual temperature compensation, maintaining measurement accuracy across a wide temperature range of 0–60°C without requiring manual recalibration for each temperature change.
Q
How do I calibrate the PH sensor?The sensor is compatible with USA standard, NIST standard, and custom pH/ORP buffer solutions, providing flexible calibration options to suit different laboratory or field measurement requirements.
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Is this PH sensor suitable for outdoor or harsh industrial environments?Absolutely. The sensor is constructed from corrosion-resistant polymer plastic and features an isolated power supply design that minimizes electromagnetic interference. Its compact and durable build makes it well-suited for water treatment plants, aquaculture, and outdoor environmental monitoring.
Q
What other water quality sensors are available in the same RS485 MODBUS series?The RS485 MODBUS water quality sensor series includes a wide range of parameters: DO, Trace DO, ORP, EC/TDS, Salinity, COD, TSS, Turbidity, CO2, Ammonia Nitrogen, Ion Selective, Oil in Water, Chlorophyll, Blue-Green Algae, Residual Chlorine, and Marine Current sensors — all sharing the same communication protocol for seamless system integration.