GRT1120A pH electrode is specially designed for complex working conditions with high viscosity and strong corrosion! When measuring viscous suspensions, strong acid wastewater, and protein containing viscous liquids, are they always plagued by problems such as interface blockage, difficult electrode adaptation, and frequent maintenance? Ordinary electrodes cannot withstand strong acid corrosion and are easily blocked by viscous substances, making it troublesome to replenish electrolytes.
It is equipped with two-point ceramic core fluid for anti blocking and anti sticking, and gel electrolyte is free of supplementation. It also supports flexible adaptation of multi length and multi sheath, which can easily solve the pH monitoring pain points of highly viscous and corrosive media, so that the measurement of complex working conditions is no longer difficult.
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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
Anti blocking and anti sticking strength: Two point ceramic core liquid interface, specially designed for high viscosity suspensions and emulsions, not easily blocked by viscous substances or suspended particles
Electrolyte free: gel dielectrics are pre charged at one time, and there is no need to supplement in the whole process. The amount of maintenance is greatly reduced, which saves worry and effort
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: The standard PG13.5 threaded socket can be used interchangeably with foreign electrodes, and old equipment can be replaced without additional modification
Strong corrosion resistance: specially designed for strong acid wastewater and chemical corrosive media, it can withstand the erosion of most strong acids and complex chemical media
Accurately adapting to the scene

- Monitoring Electroplating/Chromium Removal: This is good for monitoring plating solutions and chromium removal operations in the electroplating sector. It is resistant to corrosion from plating solutions and stops impurities from blocking the process.
- In the chemical business, there are many possible situations: pH measurement of complex media in industries including chemical medicines, dyes, pigments, and mining that can handle a wide range of working circumstances, including high viscosity and strong corrosion;
- Strong acid wastewater treatment: made to keep an eye on strong acid wastewater, can handle large concentrations of acid corrosion, and is good for pH online monitoring throughout the treatment of strong acid wastewater in industries like chemical and electroplating;
- How to measure high viscosity media: Correctly measure the pH of high-viscosity suspensions, emulsions, and protein-rich liquids, such keeping an eye on the formation of starch, sugar, mud, and pulp;

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 GRT1120A pH electrode, with its core advantages of anti clogging, anti sticking, corrosion resistance, and maintenance free, has become a reliable choice for pH monitoring of high viscosity and highly corrosive media. Multi length and multi sheath adaptation meet different installation needs. PG13.5 thread supports foreign electrode exchange, greatly reducing replacement costs. Whether it is strong acid wastewater, high viscosity suspension, or complex working conditions in industries such as chemical and electroplating, it can stably output accurate data.
By consulting now, you can obtain exclusive selection solutions and be escorted throughout the entire process, making pH measurement in complex working conditions more worry free and efficient, helping to ensure smooth production processes and precise quality control! Choosing GRT1120A means choosing stable measurement and convenient operation and maintenance under complex working conditions!
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