Smart Digital pH/ORP Sensor for Everyday Industrial Applications

The ABB 100 GP-D Digital pH/ORP Sensor is designed for customers who need reliable online pH and ORP measurement without complicated installation and frequent maintenance.

As part of ABB’s next-generation pH/ORP sensor family, the 100 GP-D combines proven sensor durability with digital communication technology, making it easier to install, configure, and maintain compared with traditional analog sensors.

It is suitable for a wide range of general process applications, including:

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  Drinking water treatment
  
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  Municipal wastewater treatment
  
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  Cooling water systems
  
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  Food & beverage processing
  
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  General industrial water monitoring
  

ABB EZLink™ Digital Connection for Easy Commissioning

One of the main advantages of the 100 GP-D is its integrated EZLink™ digital connection.

Traditional analog pH sensors often require careful wiring, manual configuration, and calibration management. The EZLink™ system simplifies this process through automatic sensor recognition and digital communication.

Benefits include:

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  Plug-and-measure installation
  
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  Automatic sensor identification
  
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  Faster commissioning
  
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  Reduced installation errors
  
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  Improved measurement reliability
  

The sensor can transfer calibration and diagnostic information directly to compatible ABB transmitters, helping reduce maintenance time.

Advanced Double Junction Reference Design

Reference stability is critical for long-term pH measurement performance.

The ABB 100 GP-D uses an extended double junction Ag/AgCl reference design with gel electrolyte and ion trap technology.

This design helps protect the sensor against:

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  Reference poisoning
  
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  Silver ion contamination
  
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  Junction blockage
  
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  Measurement drift
  

The extended diffusion path slows down the penetration of harmful substances, improving sensor lifetime in general industrial applications.

Anti-Fouling PTFE Junction for Reliable Operation

Industrial water and process fluids may contain suspended solids, deposits, or contaminants that can affect sensor performance.

The 100 GP-D features a large porous PTFE reference junction with Viton™ sealing, providing:

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  Better resistance against coating
  
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  Reduced risk of blockage
  
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  Easier cleaning
  
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  More stable reference performance
  

This makes it suitable for applications where sensor contamination is a common challenge.

High Accuracy with Fast Temperature Response

pH measurement accuracy can be affected by rapid temperature changes.

The ABB 100 GP-D integrates the temperature element close to the measuring point, allowing faster temperature compensation and improved measurement accuracy.

Key measurement capability:

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  pH range: 0 to 14 pH
  
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  ORP range: -2000 to +2000 mV
  
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  Temperature range: -5 to 60 °C
  
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  Pressure rating: up to 6 bar
  

Built-In Predictive Maintenance Diagnostics

Unexpected sensor failure can lead to incorrect process control and unnecessary downtime.

The 100 GP-D provides advanced diagnostic functions to help users monitor sensor condition, including:

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  Sensor health monitoring
  
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  End-of-life indication
  
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  Fault analysis
  
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  Maintenance planning support
  

These functions allow operators to replace sensors based on actual condition rather than fixed replacement schedules.

Flexible pH and ORP Electrode Selection

The 100 GP-D supports different electrode configurations to match various process requirements.

Available options include:

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  High-performance pH glass electrode
  
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  Flat glass electrode for in-line applications
  
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  Low-temperature glass electrode
  
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  Platinum ORP electrode
  

This flexibility allows engineers to select the correct sensor configuration according to process conditions and measurement requirements.

Typical Applications

Water Treatment

Used for:

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  Drinking water monitoring
  
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  Wastewater treatment control
  
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  Neutralization processes
  

Industrial Cooling Water

Suitable for:

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  Cooling tower water monitoring
  
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  Chemical dosing control
  
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  Water quality management
  

Food & Beverage Industry

Applied in:

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  Process water monitoring
  
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  Cleaning systems
  
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  Production quality control
  

FAQ

What is ABB 100 GP-D used for?

ABB 100 GP-D is a digital pH/ORP sensor designed for general process applications such as drinking water, wastewater, cooling water, and food & beverage measurement.

What is the difference between ABB 100 GP-D and 100 GP?

The main difference is the communication method:

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  100 GP: Traditional analog pH/ORP sensor.
  
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  100 GP-D: Digital version with EZLink™ connection, automatic recognition, and advanced diagnostics.
  

Does ABB 100 GP-D require regular electrolyte maintenance?

No. The 100 GP-D uses a gel electrolyte double junction reference design, which reduces maintenance requirements compared with traditional refillable reference systems.

Can ABB 100 GP-D measure ORP?

Yes. With the appropriate platinum electrode configuration, the sensor can measure ORP from -2000 to +2000 mV.

What is the difference between ABB 100 GP-D and 100 ULTRA-D?

The application focus is different:

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  100 GP-D: General process applications such as wastewater, drinking water, and cooling water.
  
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  100 ULTRA-D: Low-conductivity and high-purity water applications such as boiler water and demineralized water.
  

Is ABB 100 GP-D suitable for harsh chemical processes?

The 100 GP-D is designed mainly for general industrial applications. For highly aggressive chemical processes, ABB 500 series sensors are typically more suitable due to their enhanced chemical resistance and rugged construction.