266DDH.H.S.S.A.2.B.1-.EY.L1.I1.H3+S26RA.H.G1.S.F.SM.1.N.1.S.N.N.N: 266DDH transmitter: direct-mount seal selection and installation limits
The ABB 266DDH combines differential-pressure measurement with a direct-mount diaphragm seal. ABB describes direct installation capability and a family span from 0.05 to 16,000 kPa, with ±0.06% base-accuracy reference. The exact sensor, process seal and calibrated span must be established from the complete order code and nameplate.
Key technical data
| Technical item | Verified value / selection note |
|---|---|
| Representative designation | 266DDH.H.S.S.A.2.B.1-.EY.L1.I1.H3+S26RA.H.G1.S.F.SM.1.N.1.S.N.N.N |
| Measurement | Differential pressure with direct-mount diaphragm seal |
| Family span limits | 0.05–16,000 kPa; verify the sensor and calibrated range |
| Base accuracy | ±0.06% family reference |
| Process connection | Seal/flange and connection details depend on the full code |
| Outputs | HART, fieldbus or WirelessHART family options; verify installed protocol |
| Proof pressure | Sensor and seal dependent; consult the matching ABB data sheet |
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
Direct-mount seals can simplify installation where the process connection and seal geometry are compatible. Review the process medium, temperature, pressure, cleaning requirements, seal material and flange standard. The impulse-line arrangement and transmitter elevation still affect measurement behavior, so include the installation layout in the engineering review.
Configuration and compatibility
Verify the model suffix, seal assembly code, wetted materials, gasket/bolt details, fill fluid and communication option. ABB’s family-level proof-pressure data varies by sensor and seal; never assign a proof limit from another 266DDH configuration. Confirm any approval or safety claim against the exact hardware revision and certificate.
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.
- 266DDH.F.S.S.B.R.B.7.E1.LS.R1 + S26RA.H.E1.S.F.HM.1.N.1.S.N.N.N
- 266DDH.M.S.S.A.2.B.1-.EY.L1.I1.H3+S26RA.H.G1.S.F.SM.1.N.1.S.N.N.N
- 266DDHFSSB2A7L912H3
- 266DDHFSSBRB7E1LSR1+S26RAHE1SFHM1N1SNNN
- 266DDHGSSA2B1L1+ 26WAHE5FSM2AJGNNN
- 266DDHGSSB2A1V2E2L1I2H3+S26RAHE1SFSM1N1SNNN
- 266DDHGSSB2B7+S26AHG2S3SM1N1SNNN
- 266DDHHSSB2A1V1E6L1S2 + S26RAHE2SFSM1N1SNNN
- 266DDHHSSB2A1V1E6L1S2+S26RAHE2SFSM1N1SNNN
- 266DDHMSSB2B1L1I2H1
Installation and commissioning
Support the instrument and connected pipework without loading the seal connection. Protect the diaphragm from impact and contamination during installation. Commission by checking equalization, zero, output scaling, damping and diagnostics, then compare readings against a traceable pressure source before opening the process isolation valves.
Replacement and procurement information
For a quotation or replacement review, provide the complete designation 266DDH.H.S.S.A.2.B.1-.EY.L1.I1.H3+S26RA.H.G1.S.F.SM.1.N.1.S.N.N.N, 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.
