GRT1030J pH electrode is an industrial monitoring device specially built by Apure for online sewage detection scenarios. Equipped with anti pollution ring PTFE liquid interface and solid gel dielectric, it can not only effectively resist the erosion of toxic ions such as S ² ⁻ and CN ² ⁻, but also avoid the blockage of suspended solids, which can achieve long-term online stable monitoring. The electrode combines the performance advantages of low internal resistance and fast response with the characteristics of convenient installation and low maintenance, making it a cost-effective choice for wastewater pH monitoring.
★★★★★
Features
Specifications
| Parameter | Value |
|---|---|
| Measurement Range | 0-14 pH |
| Theoretical percentage slope | ≥95% |
| Zero potential | 7±0.5 |
| Temperature Range | 0-130℃ |
| Pressure Range | 0-0.3 M Pa |
| Thread Size | 3/4 inch NPT |
Scope of Application
- Suitable for online detection of sewage.
Core advantages define industrial grade reliability
Anti pollution and anti blocking design:
The annular polytetrafluoroethylene liquid interface and solid gel dielectric are used, which are not easy to be blocked by suspended solids in sewage, can meet the long-term online detection needs, and significantly reduce the frequency of cleaning and maintenance.
Strong anti poisoning:
Gel dielectric salt bridge can effectively block S ² ⁻, CN ⁻ and other toxic ions, avoid electrode “poisoning” failure from the root, extend the service life of equipment, and adapt to complex composition sewage monitoring.
Full working condition adaptation:
The special glass sensitive film can cope with the measurement of the entire pH range from 0-14, and can withstand high temperature conditions from 0-130 ℃. At the same time, it has a pressure resistance of ≤ 0.3MPa and is suitable for various industrial wastewater monitoring scenarios.
Excellent response performance:
Low electrode internal resistance, fast pH value response speed, strong data stability, theoretical percentage slope ≥ 95%, ensuring accurate and reliable monitoring data, providing effective data support for sewage treatment.
Convenient installation and maintenance:
Using terminal connection method, equipped with standard 3/4 inch NPT thread, can quickly complete installation; Solid gel dielectrics do not need to supplement dielectrics, only need to be cleaned and calibrated regularly every week, and the maintenance amount is extremely low.
Core application

Municipal sewage treatment: adaptable to water inflow and aeration tank nodes, suspended solids-resistant, long-term online pH monitoring, and discharge standard compliance.
Industrial wastewater testing: tolerant to S ² ⁻/CN ⁻ toxic water, high suspended solids wastewater, and supports high temperature conditions from 0-130 ℃, with auxiliary process temperature control.
Wastewater recycling: Real time capture of small changes in pH of recycled water to avoid corrosion of the circulation system and meet reuse standards.
Environmental supervision and monitoring: Accurate data (theoretical percentage slope ≥ 95%), can be connected to regulatory platforms, and meets the requirements for reporting pollution data.

Installation and Maintenance Guide
Measurement operation specifications
- Before measurement, the electrode should be washed in distilled water or deionized water, and the surface moisture should be absorbed by filter paper to prevent impurities from contaminating the measured water sample; Ensure that the electrode bubbles and liquid network are immersed in the water sample simultaneously during measurement to avoid data deviation.
- The connection between the electrode wire and the electrode is not waterproof, and sealing and waterproof treatment should be done during installation to avoid sewage infiltration.
Maintain standards
- Before you begin the process of taking measurements, you should clean the electrode by rinsing it with distilled water and then pat it dry using a piece of filter paper.
- In order to maintain a full protective cap, it is necessary to keep it filled with a 3.3mol/L solution of potassium chloride when it is not being used.
- Avoid leaving yourself in distilled water, protein solutions, or acidic chloride solutions for an extended period of time.
- Use a small amount of an acidic solution of hydrochloric to cleanse If you notice that the glass membrane has become foggy or has deposits on it, clean it with water.
- In order to ensure optimal functioning, the pH meter should be cleaned and calibrated on a weekly basis. When it comes to the consistent application of lime slurry, this is quite crucial.
- The sensor will be unable to regain its response if you are unable to carry out the calibration procedure on the sensor by employing the aforementioned procedures for maintenance and upkeep. Could you please buy a new sensor?
Sensor diagram illustration

- After opening the packaging, check whether there is mechanical damage to the sensitive bulb and electrode body of the electrode.
- Remove the sensor protective cover and check if there are any bubbles in the sensitive bulb of the electrode. If so, gently shake the sensor in a vertical plane to remove the bubbles.
- Select the corresponding sensor sleeve or cable head for installation according to different electrodes.
- The connection between the sensor wire and the electrode is not waterproof, please make sure to do a good job of waterproofing.
Wire stripping instructions

Attention
- The outer layer of the transparent central axis is covered with a conductive rubber layer and a metal mesh layer. When stripping, first strip the metal mesh layer into the metal mesh as shown in the picture, and be sure to removal of conductive black skin on the transparent central axis;
- The cable extends to the host without any contact points except for a dedicated junction box.
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If you are looking for a “durable and worry free” pH electrode for online sewage monitoring, GRT1030J is definitely the ideal choice! It comes with an anti fouling annular PTFE liquid interface, which is not afraid of blockage even in high suspended wastewater; The gel dielectric salt bridge can block toxic ions such as S ² ⁻ and CN ⁻ to avoid electrode “poisoning” strike; It can withstand high temperature conditions ranging from 0-130 ℃, and can handle complex scenarios from municipal sewage to industrial toxic water.
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