ABB Insertion / submersion / hot-tap, stainless steel electrodes TB26

Overview

The ABB TB26 electrode is a two-electrode contacting conductivity sensor engineered for insertion, submersion, or hot-tap installation, making it the most installation-flexible member of ABB’s stainless steel TB2 conductivity sensor range. Where the TB254 covers in-line/dip duty and the TB264 is dedicated to in-line mounting, the TB26 is built specifically to support all three of insertion, submersion, and live hot-tap installation on a single sensor body.

Seven Star LLC supplies the ABB TB26 to wastewater treatment, chemical processing, and industrial process 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 TB26 measures conductivity by applying a small AC voltage across its two contacting stainless steel electrodes and measuring the resulting current, which is proportional to the ionic conductivity of the solution. Its hot-tap capability – installing or removing the sensor through a ball valve while the process line remains live and pressurized – is the feature that most distinguishes it from the simpler TB254, letting maintenance teams service or replace the sensor without shutting down the process.

The sensor is rated to a maximum process temperature of 200°C (392°F), with a maximum pressure of 1551 kPa at 200°C for fixed insertion mounting or 690 kPa for hot-tap service (where the ball-valve assembly itself becomes the limiting pressure-rated component), and connects via a ¾-inch NPT process connection.

Engineering Design of the ABB TB26

Robust stainless steel electrode construction resists fouling and corrosion across a wide range of process chemistries, and the sensor’s rated temperature and pressure envelope covers everything from ambient wastewater streams to hot process condensate lines. Analog output ensures straightforward compatibility with standard ABB transmitters and control systems.

The three-way mounting flexibility – insertion, submersion, or hot-tap – lets a single sensor model be specified across a plant’s varied measurement points, reducing the spare-parts inventory a maintenance team needs to carry compared with stocking a different sensor for each mounting style.

Key Features

• Two-electrode contacting conductivity measurement
• Insertion, submersion, or live hot-tap installation on one sensor body
• Rated to 200°C (392°F); up to 1551 kPa at 200°C (insertion) or 690 kPa (hot-tap)
• ¾-inch NPT process connection
• Stainless steel electrode construction, fouling- and corrosion-resistant
• Hot-tap installation/removal without process shutdown
• Analog output compatible with standard ABB transmitters
• Reduces spare-parts inventory versus mounting-specific sensor models

Industrial Applications

The TB26 is used across wastewater treatment, chemical processing, and general industrial process lines in Muscat, Sohar, Salalah, and the wider GCC wherever a facility needs conductivity monitoring on a line that cannot easily be taken out of service for sensor installation or replacement.

Seven Star LLC supplies the TB26 correctly configured for the customer’s actual mounting style and process conditions, with full local support from specification through commissioning.

Technical Specifications

Choosing the Right Mounting Configuration

The TB26 supports insertion, submersion and hot-tap mounting, so the configuration must be defined before ordering. Insertion suits pipes that can be isolated for sensor removal, submersion suits open channels, basins and tanks, and hot-tap suits lines that must remain in service while the sensor is withdrawn through an isolation valve. Also confirm the conductivity range, process temperature and pressure, pipe size and the transmitter the sensor will connect to.

Installation and Commissioning

• For submersion, mount the sensor on a rigid pole and position it where it stays fully immersed at the lowest liquid level.
• For insertion and hot-tap, place the electrodes near the pipe centre line in a section with steady flow.
• Check that the hot-tap valve and retraction assembly are rated for the line conditions before live insertion.
• Enter the cell constant and temperature compensation in the transmitter, then compare with a portable meter or laboratory sample.

Maintenance and Troubleshooting

In wastewater and process water, grease, biological film and scale are the main causes of drift. Remove and clean the sensor at planned intervals, inspect the electrodes and seals, and verify the reading after reinstallation. Erratic readings often come from air bubbles, a damaged cable or moisture in the junction box rather than a faulty sensor, so check these first.

Applications in Oman and the GCC

Across Oman and the GCC the ABB TB26 electrode is suited to aeration basins and effluent channels in sewage treatment plants, cooling water systems, industrial wastewater neutralisation and chemical process lines. The hot-tap option is valuable in plants that run continuously and cannot stop a line for routine sensor service.

Planning Spares and Service Intervals

Where several TB26 sensors are installed across a plant, keeping them in the same mounting configuration simplifies spares. Record the installation date and cleaning history of each sensor, and adjust the cleaning interval to the fouling rate seen in practice rather than a fixed calendar.

Sourcing from Seven Star LLC

Seven Star LLC supplies the TB26 in the mounting configuration that fits your site and can help review process conditions before ordering.

Request a Quote for ABB Insertion / submersion / hot-tap, stainless steel electrodes TB26

Contact Seven Star LLC for a quotation on the ABB TB26 insertion/submersion/hot-tap conductivity sensor, with manufacturer documentation and local support across Oman and the GCC.

Related Products

• ABB Tri-clamp stainless steel electrodes TB25
• ABB-In-line or dip-type, stainless steel electrodes TB254
• ABB-High pressure, hot-tap, stainless steel electrodes TB27
• ABB-Toroidal, electrodeless sensor TB404
• ABB-500 PRO-D pH/ORP digital sensor
• ABB-100E general purpose 12 mm pH/redox (ORP) sensor