Where the 266DSH sits on a flow or level loop
The ABB 266DSHMSSA2A1V1E1L1I2 is built into a differential-pressure measurement loop where one side of the cell sits on the line static and the other side reads the element drop — flow across an orifice, level on a sealed vessel, or filter loading across a manifold — with the application letter S here meaning standard static differential pressure. Spanning from 6 kPa to 600 kPa (0.06 bar to 6 bar, 0.87 psi to 87 psi), one transmitter covers a wide turndown on the same body. The 4 to 20 mA analogue output stacks on top of HART for configuration and advanced diagnostics, with an additional ordering-code slot reserved for option R1 and the customer-defined add-ons. In a panel this lands on the differential-pressure transmitter segment of the rack, wired through the 1/2 in. NPT entry on the aluminium barrel housing.
Wetted-parts stack and process-side footprint
Wetted side is full stainless: AISI 316 L diaphragm, AISI 316 L flanges on a horizontal connection with 1/4 in. – 18 NPT-f direct process entries, and an AISI 316 L drain/vent valve on the process axis. The bolts and gasket set is sized for standard static, high static and gauge versions in AISI 316 ss with a PTFE gasket — meaning the same cell installs across standard DP and gauge-pressure mounting kits without a gasket change-out. Silicone oil fills the capillary, which is the standard general-service fluid on hydrocarbon-side processes; applications demanding a different fill (inert, oxygen-clean, high-temperature) sit in a different code letter on this family.
Sourcing posture for an active ABB build
Lifecycle is recorded as current, and lead time on a build of this configuration runs 6 to 8 weeks. No alternative order code sits in the ledger as a second source, so a BOM line keyed to 266DSHMSSA2A1V1E1L1I2 stays on this exact build unless the project explicitly opens a substitution review.