ABB 266DRH / 2600T Differential Pressure Transmitter with Remote Seal

Overview: Remote-Seal Precision for Severe Process Conditions

The ABB 266DRH is a differential pressure transmitter from ABB 2600T Series, purpose-built for measuring liquid, gas, or steam flow as well as level, pressure, and density in applications where the process media makes a direct-mount transmitter impractical. Characterized by its remote seal construction, the 266DRH inherits Taylor All-Welded remote seal manufacturing technology, giving it unmatched total performance and a wide selection of fill fluid, diaphragm material, capillary protection, and mounting connection options to match the most demanding process conditions.

As an authorized supplier of ABB process instrumentation, Seven Star LLC sources and supplies the 266DRH pressure transmitter to refineries, gas processing facilities, and petrochemical plants across Oman and the wider GCC. Because remote-seal transmitters are frequently specified for severe, high-temperature, or contamination-sensitive process media, Seven Star LLC helps engineering teams configure the correct seal, fill fluid, and connection combination for their application.

Measurement Principle

The 266DRH measures differential pressure by transmitting process pressure through a remote diaphragm seal and capillary system filled with a specified fill fluid, isolating the transmitter sensing module from direct contact with the process medium. This remote-seal approach is essential where the process fluid is corrosive, viscous, prone to crystallization, or simply too hot for a direct-mount sensor to survive reliably, since the capillary and seal assembly can be positioned at the process connection point while the electronics and sensing module remain in a more benign location.

The transmitter delivers a base accuracy from plus or minus 0.06%, with span limits ranging from 4 to 16,000 kPa (16 inH2O to 2,000 psi) depending on the specific sensor configuration ordered, and an overall pressure range spanning 0.2 to 2,330 psi across the 266DRH model family. Replacement plug-and-play electronics with auto-configuration capability reduce maintenance time, and an Easy Set-up menu allows configuration and zero trim in minutes without requiring an expensive handheld communicator.

Engineering Design of the 266DRH

The 266DRH supports multiple digital protocol options, HART, PROFIBUS PA, FOUNDATION Fieldbus, and WirelessHART, giving specifiers integration flexibility and transmitter upgrade capability across different plant communication architectures. The WirelessHART variant in particular eliminates complex wired infrastructure, shortening installation time and lowering overall implementation cost, with a battery life of approximately 10 years at 32-second update rates for a cost-effective, reliable process monitoring solution.

SIL2/SIL3 certification issued by TUV Nord according to IEC 61508 makes the 266DRH a suitable fit for safety-critical loops, and the transmitter stainless steel construction with All-Welded remote seal technology is engineered for long-term stability and proven reliability even under extreme ambient and process conditions. Options for capillary protection, diaphragm material, and mounting connection allow the transmitter to be tailored precisely to the process media and installation geometry required.

Key Features

The ABB 266DRH Differential Pressure Transmitter delivers precision measurement for the most demanding process applications. Key characteristics include:

• Remote diaphragm seal construction using Taylor All-Welded seal manufacturing technology.
• Base accuracy from plus or minus 0.06%; pressure range 0.2 to 2,330 psi across the model family.
• Multiple protocol support: HART, PROFIBUS PA, FOUNDATION Fieldbus, and WirelessHART.
• SIL2/SIL3 certified per IEC 61508 for safety-critical loop applications.
• Plug-and-play replacement electronics with auto-configuration for reduced maintenance time.
• WirelessHART battery life of approximately 10 years at 32-second update rates.
• Wide selection of fill fluid, diaphragm material, and mounting connection options.

Industrial Applications

The 266DRH is deployed across refinery process units, gas processing facilities, and petrochemical plants wherever differential pressure measurement of liquid, gas, or steam flow, level, or density is required on process media too hot, corrosive, or contaminating for a direct-mount transmitter. Its SIL2/SIL3 certification also makes it a preferred choice for safety instrumented systems monitoring critical process variables.

Seven Star LLC supports refinery instrumentation teams, gas processing operators, and petrochemical maintenance departments across Oman, Muscat, Sohar, and the broader GCC region with sourcing of ABB 2600T Series pressure transmitters, helping projects achieve reliable differential pressure measurement on their most severe process applications.

Technical Specifications

The table below summarizes the core specifications of the ABB 266DRH Differential Pressure Transmitter as supplied by Seven Star LLC.

Call To Action

Seven Star LLC supplies the ABB 266DRH differential pressure transmitter with full manufacturer documentation and regional technical support. Contact our instrumentation division for a formal B2B quotation, to configure the correct seal, fill fluid, and protocol for your application, or to obtain the complete technical datasheet. Seven Star LLC ensures every unit shipped across Oman and the GCC is genuine ABB hardware, correctly specified, and backed by local support.