GRT1120 pH electrode is a “stable monitoring tool” for easily clogged working conditions! When dealing with high viscosity suspensions, emulsions, protein containing viscous liquids, or monitoring wastewater and electroplating solutions, ordinary electrodes are often frequently maintained due to interface blockage, either incompatible and difficult to replace interfaces, or poorly adapted due to fixed length. It is equipped with a gel dielectric+two-point ceramic core anti blocking structure, which can directly replace foreign electrodes without repairing electrolyte. Multi length+double sheath flexible configuration perfectly covers the monitoring needs of complex media in environmental protection, chemical industry, electroplating and other industries, making the measurement of viscous working conditions accurate and painless.
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Features
Specifications
| Parameter | Value |
|---|---|
| pH Range | 0-14 |
| Temperature Range | 0-60℃ |
| Pressure Range | 0-0.3 M Pa |
| Zero potential | 7±0.5 |
| Theoretical percentage slope | ≥ 95% |
Core product advantages
Corrosion resistance to strong alkali: specially designed for the treatment of strong alkali wastewater, the electrode body and key components have excellent alkali resistance, and can withstand high concentration alkaline solution erosion for a long time
Anti blocking and anti sticking strength: Two point ceramic core liquid interface, uniform pores and anti sticking, not easily blocked by viscous substances and suspended particles, suitable for high viscosity suspensions and emulsions
Electrolyte free: gel dielectrics are pre charged at one time, and there is no need to supplement in the whole process, so the maintenance amount is greatly reduced and the operation and maintenance cost is reduced
Wide adaptability: supports multiple length options of 120/150/200/250/300mm, can be paired with 316L stainless steel or PVC sheath, suitable for different installation scenarios
Universal interchangeability: Standard PG13.5 threaded socket, can be directly exchanged with foreign electrodes, replacing old equipment without additional modification
Accurately adapting to the scene
- Online monitoring of sewage treatment: continuous monitoring of pH in industrial and biochemical wastewater, anti clogging design to deal with suspended impurities in water, and dual protective sleeves suitable for different corrosive environments;
- Application in the electroplating industry: monitoring of plating solution, online monitoring of chromium removal process, resistance to medium impurity erosion, and optional length to adapt to different plating tank depths;
- Production of viscous media: pH measurement of viscous liquids such as pulp, starch, mud, sugar, etc., with anti sticking and anti blocking properties to avoid medium adhesion and ensure continuous measurement;
- Multi scenario adaptation in the chemical industry: monitoring complex media in industries such as chemical drugs, dyes, and mining, combining multiple lengths and double sheaths to adapt to different installation requirements such as pipelines and containers;

Usage and Maintenance Guide
Installation key points
- Open box inspection: Confirm that the electrode sensitive bulb has no mechanical damage or bubbles. If there are bubbles, they can be removed by gently shaking vertically; Select the corresponding length of electrode according to installation requirements;
- Sheath matching: Choose 316L stainless steel sheath (strong corrosive medium) or PVC sheath (conventional medium) according to the characteristics of the medium to ensure compatibility;
- Interface installation: Fixed with PG13.5 threaded interface, can be paired with protective sleeve or cable head, choose pipeline or container installation method, tighten and fix to avoid shaking;
- Waterproof protection: If the connection between the electrode wire and the electrode is not waterproof, it needs to be sealed with sealant, waterproof joint or heat shrink tubing to prevent the invasion of medium or water vapor;
Maintain
- Daily cleaning: Rinse the electrode with distilled water and dry the filter paper before and after measuring. This will keep dirt and other things from entering into the measured medium. Once a week, clean the liquid interface to keep everything working well.
- Idle storage: After washing, cover it with a 3.3mol/L KCL solution and preserve it in a dry, well-ventilated spot so the delicate bubbles don’t dry out.
- Sediment treatment: Soak the glass film in weak hydrochloric acid for 5 to 10 minutes, then rinse it off if it looks foggy or glued together. Don’t scratch the delicate film with a brush that has strong bristles;
- Calibration cycle:It is best to calibrate the instrument once a week, especially when it is used in strong acids or thick liquids, to make sure the measurements are correct. Stick to the calibration frequency; don’t linger in distilled water, protein solutions, or acidic chloride solutions for too long, and don’t touch organic silicone oils because they could damage the electrodes.
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 sensor 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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The GRT1120 pH electrode, with its core advantages of anti clogging, anti sticking, maintenance free, and high adaptability, has become a reliable choice for viscous media and complex industrial conditions. Multiple lengths and dual protective sleeves are suitable for different installation needs. The standard thread supports the exchange of foreign electrodes, which not only solves the pain points of ordinary electrodes being easily blocked and difficult to maintain in viscous media, but also reduces the cost of replacing imported electrodes.
Consultation now provides exclusive selection solutions, installation guidance, and maintenance skills, allowing complex media pH measurement to overcome blockages and adaptation difficulties, and helping to efficiently operate production processes and accurately implement quality control!
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