What the order code actually configures
The ABB 266DSHHSMA1B1L1C1H4 is the 266DSH Differential Pressure Transmitter ordered for differential measurement at standard static pressure (S), paired with HART and 4 to 20 mA output on the advanced-functionality firmware — the protocol stack that drops straight into a DCS or asset-management host without a separate gateway. Sensor span runs from 1.6 to 160 kPa (16 to 1600 mbar, 6.4 to 642 inH2O), which puts this build in the low-to-mid DP range — the workhorse span for filter ΔP, vessel level via DP on a wet leg, and small-bore flow-element differentials rather than very high static line pressures.
Diaphragm, fill fluid, and process side
The wetted diaphragm is Monel 400 with silicone-oil fill, listed NACE — a corrosion-resistant build for hydrocarbon, offshore, and mildly sour-service lines where 316L is marginal, and the silicone fill keeps the span stable across the typical process-temperature swing. Process flanges and adapters are AISI 316L stainless with a horizontal 1/4 in. – 18 NPT-f direct connection, and the bolt/gasket set is 316 ss with Viton — the standard static-pressure configuration for a horizontal impulse line on a separator or filter housing.
Housing, display, and field-side hardware
The housing is the aluminium-alloy barrel with an M20 x 1.5 (CM 20) conduit entry — the variant specified for WirelessHART installations where the barrel form factor routes cleanly into a pole- or pipe-mount antenna bracket. An integral digital LCD with integrated keypad is included on the front face, so commissioning, span re-range, and trim happen at the instrument without a handheld — useful on a crowded skid where bringing a 375 communicator out is the slow part of the loop check.
Documentation the buyer receives
The build ships with an EN 10204-3.1 inspection certificate covering a 9-point calibration, plus an EN 10204-2.2 test report on the pressure-bearing and process-wetted parts (gaskets excluded) — the paper pack a QA reviewer expects when a DP transmitter lands on a pressure-boundary BOM line.
Sourcing and lead-time posture
Lifecycle is recorded as current on the ABB 266DSH line, with an estimated 4–6 week lead time — the part is configured-to-order against the order-code string rather than pulled off a shelf, so quoting and confirmation run through an RFQ on this exact suffix.