Reliable pH/ORP Sensor for Low-Conductivity Water Applications
The ABB 100 ULTRA pH/ORP Analog Sensor is designed for industrial water measurement applications where conventional pH sensors may experience unstable readings due to low ionic concentration.
In high-purity water systems, maintaining a stable reference signal is critical for accurate pH measurement. The 100 ULTRA uses ABB’s specialized electrolyte matrix technology to reduce measurement drift and provide dependable long-term operation without frequent maintenance.
Typical applications include:
Boiler water monitoring
Demineralized water systems
Steam and water analysis systems (SWAS)
Reverse osmosis (RO) systems
Condensate and feedwater monitoring
Power generation water chemistry control
Maintenance-Free Reference Design
One of the key advantages of the ABB 100 ULTRA is its maintenance-free reference system.
Unlike traditional pH sensors that require regular electrolyte replenishment, the 100 ULTRA uses a super-saturated electrolyte matrix that provides long-term stability without electrolyte top-up.
Benefits include:
Reduced maintenance requirements
Lower operating costs
Longer sensor service life
More stable measurements over time
Stable Measurement Down to 2 μS/cm Conductivity
The ABB 100 ULTRA is optimized for low-conductivity water applications.
It can operate reliably in samples down to approximately 2 μS/cm conductivity, making it suitable for applications where water purity is high but measurement accuracy remains essential.
Compared with standard industrial pH sensors, it provides:
Improved response stability
Reduced measurement drift
Reliable operation in purified water systems
Large Porous PTFE Junction for Better Stability
The reference junction plays an important role in sensor performance.
The 100 ULTRA features a large porous PTFE junction, which helps:
Resist coating and fouling
Reduce the risk of blockage
Improve measurement stability
Maintain consistent reference flow
This makes the sensor more reliable in continuous monitoring applications.
Ion Trap Technology for Longer Sensor Life
The ABB 100 ULTRA incorporates an ion trap design that helps capture silver chloride ions before they can block the reference junction.
This improves:
Reference stability
Sensor lifetime
Resistance to contamination
The result is more dependable pH/ORP measurement in demanding water treatment and power applications.
Flexible Analog Connection and Installation
The 100 ULTRA uses a traditional analog connection, making it suitable for existing ABB analytical systems and conventional pH/ORP transmitters.
Available connection options include:
Tinned leads
BNC connector
VarioPin connector
The modular ¾ inch NPT design allows simplified installation and replacement in different process assemblies.
pH and ORP Measurement Capability
Depending on electrode selection, the ABB 100 ULTRA can measure both pH and redox potential (ORP).
Measurement capability:
pH range: 0 to 14 pH
ORP range: ±2000 mV
Temperature range: -5 to 100 °C (23 to 212 °F)
Pressure rating: Up to 6 bar (90 psi)
Available electrode options include:
High-performance pH glass
Low-temperature pH glass
Platinum ORP electrode
Suitable for Power and Water Treatment Industries
The ABB 100 ULTRA is especially suitable for applications where water quality monitoring directly affects equipment protection and process efficiency.
Power Generation
Used for:
Boiler water chemistry monitoring
Condensate quality control
Steam cycle analysis
Industrial Water Treatment
Suitable for:
Demineralized water systems
RO water monitoring
High-purity process water
General Process Applications
Applied in:
Utility water systems
Cooling water preparation
Industrial water quality monitoring
FAQ
What is ABB 100 ULTRA used for?
ABB 100 ULTRA is an analog pH/ORP sensor designed for low-conductivity and high-purity water applications, especially boiler water, demineralized water, and steam water analysis systems.
What is the difference between ABB 100 ULTRA and 700 ULTRA?
The main difference is the target application:
100 ULTRA: Cost-effective low-conductivity sensor for applications down to approximately 2 μS/cm.
700 ULTRA: High-accuracy sensor designed for ultra-pure applications with conductivity down to approximately 0.2 μS/cm, using a refillable KCl reservoir and triple ceramic junction.
What is the difference between ABB 100 ULTRA and 100 ULTRA-D?
The difference is the communication method:
100 ULTRA: Analog pH/ORP sensor for traditional analyzer systems.
100 ULTRA-D: Digital version with ABB EZLink™ connection and automatic sensor recognition.
Does ABB 100 ULTRA require electrolyte replacement?
No. The 100 ULTRA uses a super-saturated electrolyte matrix designed to reduce maintenance requirements and eliminate regular electrolyte refilling.
Can ABB 100 ULTRA measure ORP?
Yes. With the appropriate electrode configuration, the sensor can measure ORP up to ±2000 mV using a platinum ORP electrode.
Is ABB 100 ULTRA suitable for wastewater applications?
Generally, no. The 100 ULTRA is optimized for low-conductivity and high-purity water applications. For aggressive wastewater or heavily contaminated industrial processes, ABB 500 series sensors are usually more suitable.
