PRECISE pH/ORP SENSOR GRT1120PD

The GRT1120PD differential pH sensor is based on innovative differential technology and features a durable structural design, making it easy to overcome monitoring pain points in harsh environments. It reduces the risk of data drift and frequent maintenance in complex chemical media such as acidic substances, organic solvents, and hydrocarbons that traditional dual electrode pH sensors often suffer from reference contamination and closed-loop interference. Provide stable and reliable solutions for industrial precision measurement.

★★★★★

  • Short delivery time
  • Better price
  • Customizable parameters

Features

  • Using differential measurement technology with excellent accuracy and reliability – replacing traditional pH with three electrodes
    Dual sensors of sensors.
  • The replaceable salt bridge extends the service life of the sensor (limited to 3/4 “plastic shell electrodes only)

Specifications

ParameterValue
pH Range0-14
ORP Range-1500—+1500mV
SensitivitypH：±0.01pH ORP：±0.5mV
Temperature Range0-60℃
Pressure resistance3bar

Core product advantages

Differential three electrode technology:

replacing traditional dual sensors, reducing reference pollution, and eliminating closed-loop circulation

Salt bridge replaceable design:

3/4 “plastic shell model supports salt bridge replacement, extending service life

Ultra high measurement accuracy:

pH ± 0.01pH, ORP ± 0.5mV, more accurate data

Universal compatibility:

PG13.5 threaded interface, can be flexibly installed with protective sleeve

Accurately adapting to the scene

  • Chemical production scenario: real-time monitoring of pH/ORP for acid-base synthesis reactions, organic solvent preparation, chemical reagent production and other processes, resistant to corrosion from various chemical media, and avoiding the problems of traditional sensor contamination and data drift;
  • Industrial wastewater treatment scenario: For severe water quality such as high concentration organic wastewater, acid-base wastewater, and residual solvent wastewater, precise monitoring of parameter changes in key processes such as biochemical treatment and neutralization reactions can be carried out to assist in process optimization and regulation;
  • Fine Chemicals and Pharmaceutical Intermediates Scenario: This is helpful for producing aromatic compounds because it enables you change pH and ORP very precisely. It is also used to make certain solvents, pure chemicals, and other things. It meets rigorous quality control standards since it can find variations in pH levels within a range of ±0.01pH.
  • Petrochemical scenario: It can be used to keep a watch on the production, separation, and recovery of hydrocarbons and ketones. It can also keep operating successfully even when the solvents are quite strong and the circumstances are bad.

Usage and Maintenance Guide

  • Daily cleaning: Rinse the electrodes with distilled water before and after measurement to avoid residual media
  • Idle storage: Cover with a protective cover containing 3.3mol/L KCL solution and store in a dry and ventilated place
  • Salt bridge replacement: Operate the 3/4 “plastic shell model according to the instructions, soak and activate for 24 hours after replacement, and then calibrate again
  • Calibration cycle: It is recommended to calibrate once a month, and for high pollution conditions, it should be shortened to once a week

Sensor diagram illustration

  1. After opening the packaging, check whether there is mechanical damage to the sensitive bulb and electrode body of the electrode;
  2. 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;
  3. Select the corresponding sensor sleeve or cable head for installation according to different electrodes;
  4. 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.

Technical Support

There are three key pain spots, and the fundamental answer to these problems is to reduce the amount of contamination on the reference electrodes and to avoid any distortion of the data. Second, the elimination of closed-loop loops and the improvement of signal stability are both potential solutions. There is a third method that involves reducing maintenance by more than fifty percent, adjusting to continuous production in industrial settings, and doing away with the requirement for frequent cleaning and calibrating responsibilities.

The use of anhydrous ethanol is recommended for the removal of organic sediments, such as oil stains and lipids. On the other hand, inorganic sediments, such as scale and salt crystals, should be soaked in either citric acid or dilute hydrochloric acid. Soak in the KCL solution for a period of twelve hours after cleaning. A two-point calibration was performed, and the error was found to be ≤± 0.02pH. This indicates that the electrode has regained its previous level of performance.

When electrodes are used in such organic solvents for a long time, in addition to maintaining stable measurement performance, attention should also be paid to the temperature and concentration of the medium – if the medium temperature is close to the rated upper limit of 60 ℃ or the concentration is extremely high, the maintenance cycle should be shortened to avoid accelerating material aging.

Its service life will not be significantly shortened by the use of conventional organic solvents. Under normal working conditions, the theoretical service life can reach 1-2 years. If maintained properly (regular cleaning, calibration, timely replacement of salt bridges for 3/4 “plastic shell models), the service life can be further extended. However, it should be noted that the electrode should not be immersed in strong oxidizing organic solvents for a long time, as such media may corrode the surface material of the electrode and affect the salt bridge performance. It is recommended to use it with a dedicated protective sheath.

First, ensure that the power is turned off and the protective sleeve is removed. Next, remove the old salt bridge and clean the residue that is on the interface. Finally, install a new salt bridge and make sure that it is tightened. Activate by soaking in a solution of 3.3mol/L potassium chloride for a period of twenty-four hours, and then calibrate using a standard solution. Unplugged operation, an interface that has not been cleaned, and insufficient activation time are all misconceptions that can impact the accuracy of measurements or cause harm to electrodes.

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In harsh environments including chemical engineering, wastewater treatment, and fine chemical processing, the GRT1120PD differential pH electrode solves contamination and drift issues with three electrodes. The data is accurate, with a margin of error of only ± 0.01 pH. The flexible PG13.5 interface can be configured in many ways. Replace the salt bridge to save money. It is reliable, durable, and easy to maintain, whether you are monitoring production or quality. Exclusive selection, full installation guidelines, and expert assistance are now available from Consultation. This simplifies pH/ORP monitoring in challenging work conditions and ensures production and quality.

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