Online Monitoring Digital Soil PH Probe RS485 Modbus PH Sensor IP68 Waterproof

Digital Soil pH Probe RS485 pH Sensor

>>Technical Parameter

Power Supply: 9~36VDC
Output: RS485 MODBUS RTU

Measuring Material: Glass/Silver + Silver Chloride
Housing Material: PP
Waterproof Rating: IP68

Measuring Range: 0-14pH
Accuracy: ±0.05pH
Pressure Range: ≤0.3MPa

Temperature Compensation: NTC10K
Temperature Range: 0-80℃

Calibration: Sample Calibration, Standard Solution Calibration

Connection: 4-core Cable
Cable Length: Standard 10m cable, extendable up to 100m
Installation Thread: PG13.5

Application: Soil Online Monitoring

>>Overview

The core theory of pH electrode measurement is the Nernst equation. The sensor used in potentiometric analysis is called a galvanic cell. A galvanic cell is a system that converts chemical reaction energy into electrical energy. The voltage of this cell is referred to as the electromotive force (EMF). This EMF consists of two half-cells. One half-cell is the measuring sensor, whose potential is related to the activity of specific ions; the other is the reference half-cell, often called the reference sensor, which is typically connected to the measurement solution and the instrument.

>>Electrode Maintenance and Care

○ Before use, unscrew the protective cap and immerse the electrode bulb and liquid junction in the sample.

○ If salt crystals form near the electrode tip or inside the cap due to electrolyte evaporation, rinse with water. This indicates normal dialysis membrane function.

○ Check for air bubbles in the glass bulb by shaking the electrode vertically.

○ Keep the glass membrane hydrated for fast response. After measurement or calibration: Rinse the electrode thoroughly. Add storage solution (3 mol/L KCl) to the protective cap.

○ Ensure terminal connections remain dry. Clean with anhydrous alcohol if contaminated.

○ Avoid prolonged immersion in distilled water, protein solutions, or contact with silicone grease.

○ For aged electrodes with cloudy membranes or deposits, soak in 10% HCl, then rinse.

○ Regularly clean and calibrate the electrode. If calibration fails after maintenance, replace the electrode.

>>Lifespan

Under normal conditions with proper maintenance, electrodes last over 12 months. Even unused electrodes have a shelf life of 12–24 months (if stored correctly). Exposure to strong acids, bases, high temperatures, or corrosive liquids shortens lifespan. Electrodes are consumables and generally not covered by warranty.

>>Electrode Calibration

○ Use fresh pH/ORP standard buffer solutions of appropriate concentrations.

○ Remove the protective cap and rinse the electrode with distilled water.

○ Set the instrument to calibration mode (refer to the instrument manual for details).

○ After calibration, measure actual samples.

Founded in 2015, Juge focuses on the field of environmental online monitoring and has gathered outstanding talents who have been engaged in environmental online monitoring for many years. At the same time, it cooperates with some key professional universities and research institutes in China, and is a national high-tech enterprise that integrates research and development, production, sales, and after-sales service with environmental online monitoring systems as its core. It is a provider of overall solutions for smart environmental online monitoring systems.

Main business focuse on water quality monitoring instruments, flue gas analyzers, VOC online monitoring systems, CEMS flue gas continuous monitoring systems, and flue gas particulate matter monitoring systems. Widely used in safety, environmental protection, petroleum, chemical, pharmaceutical, metallurgical, coal chemical, warehousing and other fields

With a pragmatic enterprise management team, high-end R&D talents, experienced manufacturing experts, and enterprising marketing elites, we have developed a leading position among domestic peers and have always adhered to the business philosophy of providing users with higher quality products and more intimate services. We have made a vision of being responsible and doing our best to create an environmentally friendly and healthy work and living environment, and our goal is to pursue the interests of our customers.