ABB 100 GP pH/ORP analog sensor

Overview

The ABB 100 GP is a general-purpose analog pH/ORP sensor designed for reliable, stable measurement in standard-duty industrial applications where cost-effectiveness matters as much as accuracy. It occupies the entry point of ABB’s 100-series sensor family – positioned below the compact 100E and the harsh-duty 100 ULTRA – giving plants a dependable, straightforward option for routine pH/ORP measurement points that don’t require specialized form factors or extreme chemical resistance.

Seven Star LLC supplies the ABB 100 GP sensor to industrial operators across Oman and the wider GCC.Seven Star LLC supplies this item on request with the manufacturer documentation, and availability and lead time are confirmed at quotation.

Operating Principle

The 100 GP uses a conventional glass-membrane pH electrode (or a metal ORP electrode) paired with a reference junction to generate a millivolt signal proportional to hydrogen-ion activity or redox potential, which a connected analog transmitter converts into a process reading. Its analog output ensures straightforward compatibility with existing control systems, allowing it to be dropped into legacy instrumentation without requiring a transmitter upgrade.

Chemical-resistant construction protects the sensor body against the moderate range of chemicals typical of general water treatment and food processing duty, while the sensor’s design minimizes drift, reducing how often operators need to pull it for recalibration compared to lower-grade alternatives.

Engineering Design of the ABB 100 GP

Built with robust materials, the 100 GP is designed to perform reliably across water treatment plants, food processing lines, and general chemical manufacturing without the specialized sealing or exotic materials that add cost to ABB’s higher-tier sensors. Its high-quality reference junction and durable membrane maintain measurement integrity through normal process variation.

Installation is quick and straightforward, and the sensor’s analog signal path keeps it compatible with the broadest possible range of existing transmitters and control systems – a practical advantage for plants standardizing on a familiar signal type rather than introducing digital sensor infrastructure.

Key Features

• General-purpose analog pH and ORP measurement
• Cost-effective entry point in ABB’s 100-series sensor family
• Chemical-resistant construction for standard-duty environments
• Analog output for seamless integration with existing control systems
• Minimized drift reduces recalibration frequency
• High-quality reference junction and durable membrane
• Quick, straightforward installation
• Long service life with low maintenance requirements

Industrial Applications

The 100 GP is commonly used for routine pH and ORP monitoring in water treatment plants, food processing lines, and general chemical manufacturing – applications where standard-duty performance and analog compatibility matter more than compact form factor or extreme chemical resistance. It is a practical choice for plants with many measurement points where cost-effective standardization is a priority.

Across Oman’s water treatment, food processing, and general industrial sectors, and throughout the wider GCC, Seven Star LLC supplies the 100 GP to facilities in Muscat, Sohar, and Salalah that require dependable, factory-genuine general-purpose pH/ORP sensors with full local support.

Technical Specifications

Selecting pH or ORP for Your Measuring Point

The 100 GP family covers both pH and ORP measurement, so the first step is to confirm which variable the process needs. pH is used for neutralisation, dosing control and effluent compliance; ORP is used where the oxidising or reducing strength matters, such as chlorination, dechlorination or cyanide and chromate treatment. Also confirm the mounting style, the cable length to the transmitter and the process temperature range, and check that the process does not contain strong solvents, hydrofluoric acid or heavy solids, which are better served by ABB’s harsh-duty sensors.

Installation and Commissioning

• Install the sensor at an angle with the tip pointing downward so the internal electrolyte stays in contact with the glass bulb.
• Keep the sensor wet at all times after removing the protective cap; a dried-out glass membrane responds slowly.
• Choose a location with steady flow and representative sample, away from chemical dosing points.
• Perform a two-point buffer calibration for pH, or check ORP against a reference solution, before placing the loop in service.

Maintenance and Troubleshooting

Slow response, a reduced slope or an offset that keeps growing are typical signs that the glass is coated or the reference junction is blocked. Clean the sensor with a solution suited to the deposit, rinse, and recalibrate. Keep calibration records so you can see when slope and offset trends indicate the end of sensor life, and plan replacement before the measurement becomes unreliable. Store spare sensors in their caps with storage solution, not dry and not in pure water.

Applications in Oman and the GCC

In Oman and the GCC the ABB 100 GP sensor is well suited to municipal water and wastewater plants, desalination post-treatment, cooling water treatment, and food and beverage utilities, where many standard measuring points need a dependable sensor that is simple to maintain.

Sourcing from Seven Star LLC

Seven Star LLC supplies the 100 GP sensor with compatible ABB transmitters, buffer solutions and accessories, and helps plants standardise sensor types across their measuring points.

Request a Quote for ABB 100 GP pH/ORP analog sensor

Contact Seven Star LLC for a quotation on the ABB 100 GP pH/ORP analog sensor, with manufacturer documentation and local support across Oman and the GCC.

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