266AST-C-K-P-N-B-1-L1 selection: absolute pressure measurement and configuration checks
The ABB 266AST-C-K-P-N-B-1-L1 is an absolute-pressure transmitter designation within the 266AST family. ABB describes the family for liquid, gas and steam pressure applications, with a 0.04% base-accuracy reference. The C sensor-span code is associated with a 0.3–6 kPa family span in ABB configuration literature; the configured lower and upper range values must still be checked against the unit’s nameplate and order documentation.
Key technical data
| Technical item | Verified value / selection note |
|---|---|
| Complete designation | 266AST-C-K-P-N-B-1-L1 |
| Measurement | Absolute pressure for liquid, gas or steam applications |
| Sensor span code | C code family reference: 0.3–6 kPa span; verify the exact calibrated range |
| Base accuracy | ±0.04% family reference; confirm installed configuration and conditions |
| Process connection | Code-dependent; verify connection standard and wetted material from full designation |
| Output and communication | Options depend on complete order code; confirm HART or fieldbus version |
| Configuration check | Confirm range, overpressure, approvals, display and accessories before replacement |
The table summarizes family or catalog values for identification and initial selection. Confirm the nameplate, environmental limits, standards, revision and options for the exact device before procurement or engineering approval.
Application and system selection
Absolute pressure measurement uses a vacuum reference and is therefore distinct from gauge or differential pressure measurement. Typical selection work includes vessel pressure, evaporator or condenser monitoring and other processes where atmospheric-pressure variation must not be part of the measurement reference. Confirm the required range, static and overload conditions, process temperature, fluid compatibility and response time before selecting the transmitter.
Configuration and compatibility
Read the complete designation character by character against the applicable ABB configuration guide. Verify the sensor span, calibrated range, process connection, wetted materials, output protocol, enclosure, approvals, display and accessories. The suffix alone should not be used to infer a feature when a revision or market-specific code table may differ. Check the exact order record and nameplate when assessing a replacement.
Related models and order-code references
The following designations are related catalog references, not automatic substitutes. Check each complete code, rating, connection, revision and application requirement before selecting a variant.
- 266AST.R.K.T.N.B.1-E2.L5.B7.M5.I1.C1.C6.H3.A1.W03 + M26.P.A.S.2.V.S.P.N.F.F.1.N.N.2
Installation and commissioning
Install the transmitter using pressure-rated fittings and an orientation suitable for the process connection. Isolate and depressurize the line before maintenance, follow the approved wiring and grounding practice, then commission zero and span with a traceable reference. Validate loop scaling, diagnostics and control-system engineering units under the site procedure, and document the final range and installed configuration.
Replacement and procurement information
For a quotation or replacement review, provide the complete designation 266AST-C-K-P-N-B-1-L1, the order code where applicable, serial or hardware revision, quantity, operating environment, connected equipment and required delivery date. Include a legible nameplate image and relevant wiring, loop or switchgear drawing so the exact interface and configuration can be checked.
Ask the supplier to confirm accessories, revision compatibility and any approved successor in writing. Do not select solely from a family name or product photograph. Follow the current ABB installation and safety instructions for the exact unit.
