The ABB 266AST is a high-performance absolute pressure transmitter designed for continuous measurement in industrial processes. It measures absolute pressure in liquids, gases, and steam, offering stable performance, flexible configuration, and advanced local operation features.
Key Features
- Absolute pressure measurement for liquids, gases, and steam
- Base accuracy of ±0.04%
- Span limits from 0.3 to 10,000 kPa absolute
- 4–20 mA with HART, PROFIBUS PA 3.01, or FOUNDATION Fieldbus ITK 6.x
- LCD with Through-The-Glass (TTG) configuration
- Replaceable electronics module with automatic configuration
- Flexible wetted materials and fill-fluid options for demanding process media
- SIL2 capability in a single-transmitter configuration and SIL3 in a redundant configuration, according to IEC 61508
- PED Category III compliance
Applications
Suitable for absolute pressure monitoring in chemical processing, oil and gas, power generation, industrial utilities, and other process industries involving liquids, gases, or steam. The appropriate pressure range, wetted materials, communication protocol, and certifications should be selected according to the actual process requirements.
Why Choose the ABB 266AST?
The 266AST combines high measurement accuracy, long-term stability, flexible communication options, and convenient field configuration to support reliable pressure measurement in demanding industrial applications.
Q1: What is the ABB 266AST Absolute Pressure Transmitter used for?
It measures absolute pressure in liquid, gas, and steam applications for industrial process monitoring and control.
Q2: What is the accuracy of the 266AST?
Its specified base accuracy is ±0.04%.
Q3: What is the measuring range of the ABB 266AST?
The published span limits range from 0.3 to 10,000 kPa absolute, depending on the selected configuration.
Q4: Which communication protocols are available?
The 266AST offers 4–20 mA with HART, PROFIBUS PA 3.01, and FOUNDATION Fieldbus ITK 6.x options.
Q5: What is Through-The-Glass (TTG) technology?
TTG allows field configuration through the transmitter's front window without removing the windowed cover.
Q6: Can the electronics module be replaced in the field?
Yes. The replaceable electronics module uses automatic configuration to simplify replacement and reduce maintenance downtime.
Q7: Is the ABB 266AST suitable for safety instrumented systems?
ABB states that it meets SIL2 requirements in a single-transmitter configuration (1oo1) and SIL3 requirements in a redundant configuration (1oo2), according to IEC 61508.
Q8: Can the 266AST be used with corrosive process media?
Material options are available for different process conditions. Confirm the compatibility of wetted materials with the specific medium before ordering.
Q9: Is the 266AST suitable for hazardous industrial environments?
The transmitter offers options for demanding applications. Verify the exact hazardous-area approval and installation requirements for the selected configuration.
Q10: How can I request a quotation for the ABB 266AST?
Provide the required absolute pressure range, process medium, communication protocol, wetted-material requirements, electrical connection, and applicable certifications.
