GRT1020JP SENSOR-IDEAL HELPER

The GRT1020JP ORP sensor, made of PTFE corrosion-resistant material, wide range response, and standard installation design, optimizes the precise monitoring of oxidation-reduction potential (ORP) in circuit boards and chromium containing wastewater treatment scenarios, which directly affects the water quality treatment effect. It has become an exclusive detection device for such highly corrosive media, providing stable potential data for wastewater treatment process regulation.

★★★★★

  • Short delivery time
  • Better price
  • Customizable parameters

Features

  • Composed of platinum indicator electrode and silver chloride reference electrode composite, suitable for temperatures ranging from 0-60 ℃ .
  • PTFE material, excellent corrosion resistance.
  • Adopting terminal block method, equipped with standard 3/4 inch thread;

Specifications

ParameterValue
Measurement Range-1999~1999mV
MaterialPTFE
Temperature Range0-60℃
Pressure Range0-0.3M Pa
Potential range245-270mV
Thread Size3/4 inch NPT
Stable range±8mV/24h

Scope of application

  • The electrode can be used with various pH meters and is suitable for online wastewater detection;
  • The electrode’s lifespan is six months under normal use, but harsh environments or improper maintenance will shorten its lifespan.

Core Product Advantages

  • Strong corrosion resistance: Using PTFE material shell, it can withstand strong corrosive media such as chromium containing wastewater, and is suitable for long-term use in harsh working conditions;
  • Wide range and high stability: ORP range covers -1999~1999mV, potential stable at 245-270mV, 24-hour drift ≤ 8mV, reliable data;
  • Easy installation: equipped with 3/4 inch NPT standard thread, compatible with conventional electrode sheaths/connectors, and compatible with existing monitoring equipment;
  • Easy maintenance: Platinum stains can be cleaned with acetone/alcohol, insoluble organic matter can be wiped with dilute hydrochloric acid, and the daily maintenance threshold is low.

Scope of Application

Wastewater treatment of circuit boards: ORP monitoring of wastewater containing chromium and heavy metals during the production process of circuit boards to assist in precise control of redox processes;

Chromium containing wastewater treatment: Potential detection in the industrial chromium containing wastewater treatment process to ensure the reduction/precipitation effect of chromium ions and ensure that the effluent meets the standard;

Monitoring of oxidation-reduction in highly corrosive media: Suitable for ORP detection in water containing other highly corrosive components, such as chemical acid wastewater treatment and other scenarios.

sewage
sewer

Usage, maintenance and precautions

Measurement requirements:

The sensor testing part and the reference liquid network part need to be immersed in the measured liquid at the same time, otherwise it will cause incomplete detection circuit and data distortion;

Standard solution management:

ORP standard solution (hydroquinone saturated solution) should be stored for no more than 48 hours after preparation. If it exceeds the time limit, it will become invalid and needs to be replaced in a timely manner;

Cleaning method:

Gently wipe platinum stains with acetone/alcohol; Wipe with 30-50% hydrochloric acid to avoid scratching platinum stains when exposed to insoluble organic matter;

Waterproof and wiring:

The connection between sensor wires and electrodes is not waterproof, and sealing treatment should be done during installation; When stripping the wire, the conductive black skin on the transparent central axis must be removed. It is forbidden to add contacts in the middle of the cable to prevent signal interference.

Sensor diagram illustration

168 Electrode length
  1. After opening the packaging, check whether there is mechanical damage to the sensitive bulb and electrode body of the sensor;
  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 sensors;
  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

The corrosiveness of wastewater that contains chromium is quite effective. At the same time, the wide ORP range covers the potential variation range of chromium-containing wastewater treatment, with high stability and accurate feedback of process status. The sensor is made of PTFE, which is a material that is resistant to corrosion and can withstand the erosion of strong corrosive media such as chromium ions for example.

The PTFE material of GRT1020JP belongs to polytetrafluoroethylene and has the characteristics of being the “king of acid and alkali resistance”. It can withstand strong corrosive media such as concentrated hydrochloric acid, concentrated sulfuric acid, and chromic acid, and is particularly suitable for scenarios such as chromium containing wastewater (containing Cr ⁶⁺, acidic components) and chemical acidic wastewater from circuit boards.

However, ordinary plastic sensors (such as PP and PVC) in chromium containing wastewater may experience problems such as shell aging and cracking due to the strong oxidizing properties of chromium ions and acidic media erosion. Short term use may result in sealing failure, leading to internal reference liquid leakage and direct electrode scrapping; Long term use may cause swelling of the material, which can damage the stability of the electrode structure and result in the inability to continuously output reliable data.

The active ingredients in the saturated solution of hydroquinone are prone to oxidation and failure. After more than 48 hours, the potential reference of the standard solution will deviate, and using it to calibrate the electrode will increase the error of the detection data. Therefore, it is necessary to prepare and replace it in a timely manner.

When scrubbing with hydrochloric acid, two points should be noted: ① The concentration of hydrochloric acid should not exceed 50%, otherwise it will corrode the platinum surface and damage its sensitive activity; ② The scrubbing time should be controlled within 10-15 seconds to avoid prolonged contact of hydrochloric acid with the electrode housing (although PTFE is corrosion-resistant, long-term immersion may still affect the sealing performance).

After scrubbing, it is necessary to rinse the sensor surface with a large amount of distilled water/deionized water to ensure that residual hydrochloric acid is completely removed. If hydrochloric acid remains, it will be carried into the measured liquid, changing the actual ORP value of the medium and causing distortion of the detection data; After rinsing, filter paper should be used to absorb the moisture before calibration or use.

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GRT1020JP is a unique ORP electrode used for chromium containing circuit boards and wastewater treatment. Due to its corrosion-resistant PTFE material and wide range of reliable responses, it is highly suitable for monitoring highly corrosive media. It can provide reliable testing services at low maintenance costs, from daily wastewater treatment potential control to process improvement data, and ensure that wastewater treatment operations are stable and comply with all standards. According to the electrode usage method and nursing practice, its lifespan will be extended.

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