The GRT1030JW pH sensor is an industrial grade monitoring device specially designed for online detection of sewage. With its core characteristics of anti pollution, anti blocking, anti toxic and temperature resistant, as well as convenient installation and low maintenance advantages, it can achieve precise and stable monitoring of the entire pH range, making it an ideal choice for municipal and industrial sewage monitoring.
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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, anti blocking and anti toxic:
Equipped with a circular polytetrafluoroethylene liquid interface, not easily blocked by sewage impurities, and can be detected online for a long time; Equipped with solid gel dielectric salt bridge, it can effectively resist sensor poisoning caused by S ²、CN⁻.
Excellent measurement performance:
Using special glass sensitive film, suitable for measuring in the full pH range of 0-14, with low sensor internal resistance, fast response speed, strong data stability, and theoretical percentage slope ≥ 95%.
Easy installation:
Using terminal block connection method, equipped with 3/4 inch standard thread, can be matched with protective sleeve or cable head for installation.
Core application

Municipal sewage treatment monitoring:It can be used for online pH monitoring of water inlet, aeration tank, sedimentation tank, water outlet and other links. Its annular PTFE liquid interface can resist the blockage of high impurity sewage at the water inlet. gel dielectric can prevent sensor poisoning caused by sulfide plasma in the biochemical tank and ensure the stability of the full flow data.
Monitoring of sewage pipeline network in industrial park:Equipped with 3/4 inch standard threads, it can be easily installed in the protective tube of the pipeline monitoring point. The low internal resistance and fast response characteristics can provide real-time feedback on the pH fluctuations of sewage in the pipeline network, timely warning of illegal discharge of high acidity and alkalinity wastewater, and ensure the safety of the pipeline network.
Chemical cyanide/sulfur containing wastewater: gel dielectric salt bridge can effectively resist the poisoning effect of S ² ⁻ and CN ² plasma, and can monitor the pH value of toxic wastewater in electroplating and metallurgy industries for a long time, providing data support for the adjustment of wastewater pretreatment process.
Organic wastewater in the pharmaceutical/food industry: Special glass sensitive membranes can tolerate the complex components of organic wastewater while avoiding damage to sensors from long-term immersion in protein solutions (requiring proper maintenance), and are suitable for pH monitoring of pharmaceutical intermediate wastewater and food processing washing wastewater.

Installation and Maintenance Guide
Measurement operation specifications
- Before measurement, the sensor 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 sensor 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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GRT1030JW, as a core pH electrode specially designed for online sewage detection, has passed rigorous performance tests and meets industrial level monitoring standards in terms of pollution resistance, gas resistance, and high temperature resistance. It has become the mainstream choice for municipal sewage treatment plants and chemical parks. From easy installation to easy maintenance, from precise data to adaptable working conditions, we fully meet the core requirements of sewage monitoring.
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