ABB 100 ULTRA pH/ORP analog sensor

Overview

The ABB 100 ULTRA is a high-performance analog pH/ORP sensor designed for low-conductivity water within ABB’s 100-series family, with a high-volume electrolyte chamber and a large porous PTFE junction. Where the 100 GP and 100E are sized for routine and space-constrained applications respectively, the 100 ULTRA is the choice when the water has low conductivity.

Seven Star LLC supplies the ABB 100 ULTRA sensor to industrial operators across Oman and the wider GCC as an experienced supply partner for genuine ABB instrumentation. Every unit is supplied on request with manufacturer documentation, and supported locally with application guidance for demanding process chemistries.

Operating Principle

The 100 ULTRA measures pH or ORP through a glass-membrane or metal electrode paired with an advanced reference system, generating a standard analog signal fully compatible with existing transmitters and control systems – preserving the integration simplicity of ABB’s 100-series while adding a design for low-conductivity water. Its design suits low-conductivity water measurement.

The sensor has no electrolyte to top up, which reduces the maintenance usually associated with pure water applications. This reduces maintenance effort in low-conductivity water applications.

Engineering Design of the ABB 100 ULTRA

Built for low-conductivity water such as boiler water, the 100 ULTRA’s electrolyte and junction design is the key differentiator within the 100-series lineup – the same general sensor architecture as the 100 GP, but with a junction and electrolyte system selected for low-conductivity water.

Plug-and-play installation design ensures quick deployment and easy calibration despite the sensor’s upgraded materials, so plants gain the durability benefit without a more complex commissioning process than the standard-duty 100 GP would require. Confirm suitability for the measurement point against the ABB operating instruction before ordering.

Key Features

• High-performance analog pH and ORP measurement
• Designed for low-conductivity water, down to 2 µS/cm
• No electrolyte to top up, reducing maintenance in pure water applications
• Analog output for seamless compatibility with existing transmitters
• High-volume electrolyte chamber with a large porous PTFE junction
• Plug-and-play installation and easy calibration
• Digital version 100 ULTRA-D available for ABB digital transmitters
• For water below its range, ABB offers the 700 ULTRA (down to 0.05 µS/cm)

Industrial Applications

The 100 ULTRA is used in power and process plants where the water has low conductivity, for example boiler water corrosion control so that routine maintenance is reduced.

Across Oman’s petrochemical, wastewater treatment, and food processing sectors, and throughout the wider GCC, Seven Star LLC supplies the 100 ULTRA as a trusted supplier of ABB products to facilities in Muscat, Sohar, and Salalah that need dependable, factory-genuine harsh-duty pH/ORP sensors with full local support.

Technical Specifications

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

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

Choosing the Right 100 ULTRA Variant

Sensors in this family are ordered by measurement type and construction, so check the model code on the existing sensor body or cable tag before re-ordering. Confirm whether the loop measures pH or ORP, the electrode and reference options, the mounting style (insertion, submersion or flow-through), the process connection, the integral cable length and the transmitter it connects to. Also note the water conductivity, because low conductivity is the condition the 100 ULTRA is designed for.

Installation and Commissioning

• Mount the sensor so the electrode stays wetted at all times, typically angled above horizontal so air bubbles do not collect on the glass.
• Choose a point with representative flow; avoid dead legs, and places directly after chemical injection where mixing is incomplete.
• Keep the analog sensor cable in its own conduit, away from power cables and VFD outputs, as high-impedance pH signals are sensitive to noise.
• Remove the protective cap only at installation and never let the electrode dry out.
• Perform a two-point buffer calibration (pH) or a reference-solution check (ORP) on the transmitter before placing the loop in control.

Maintenance and Troubleshooting

Set the cleaning and calibration interval from experience on the actual process, starting frequently and extending as data allows. Typical symptoms and causes:

• Slow response: coating on the glass or a fouled reference junction; clean with a solution suited to the deposit (acid for scale, detergent for oils).
• Drifting reading: reference poisoning or depletion, often from sulfides or heavy metals in the process.
• Low slope or offset at calibration: aged or damaged glass; replace the sensor if cleaning does not restore performance.
• Noisy signal: check cable integrity, grounding and the solution ground connection if used.

Applications in Oman and the GCC

pH and ORP sensors are used in refinery sour water and caustic treatment, produced water handling, cooling water and boiler chemistry at power plants, seawater reverse osmosis pretreatment and chlorination control, and industrial wastewater neutralization across Oman and the wider region.

Sourcing Through Seven Star LLC

Share the sensor model code and process conditions with Seven Star LLC for a quotation on genuine ABB sensors, supplied with available manufacturer documentation to sites across Oman and the GCC.

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