{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"266MSTFCSB3B1E1L1B1C1M5","brand":"ABB","brandSlug":"abb","productSlug":"266MSTFCSB3B1E1L1B1C1M5","canonicalUrl":"https://aoctrl.com/abb/266MSTFCSB3B1E1L1B1C1M5","factsUrl":"https://aoctrl.com/api/mcp/products/266MSTFCSB3B1E1L1B1C1M5","rawCanonicalId":null},"summary":{"shortDescription":"ABB 266MST Differential Pressure Transmitter, order code 266MSTFCSB3B1E1L1B1C1M5, HART digital communication and 4 to 20 mA output, sensor span 0.4 to 40 kPa, max working pressure 160 bar, ATEX Intrinsic Safety Ex ia, with integral LCD display.","salesMarkdown":"## What this transmitter brings to a process line The 266MSTFCSB3B1E1L1B1C1M5 is a differential pressure transmitter from ABB's 266MST series, delivering a 4 to 20 mA output with HART digital communication — so the loop carries both the analog process variable and digital diagnostics to a DCS or PLC without extra wiring. Sensor span limits run from 0.4 kPa up to 40 kPa (4 to 400 mbar), and the maximum working pressure hits 16 MPa / 160 bar / 2320 psi — sized for medium-differential applications like filter monitoring, flow measurement across an orifice plate, or level on a pressurized vessel. The integral LCD display (code L1) gives a local readout for commissioning and spot checks without needing a handheld communicator. ## Materials and certifications for hazardous-area and oxygen service Explosion protection is ATEX Intrinsic Safety Ex ia (code), so this unit can be wired into a Zone 0 or Zone 1 loop with an appropriate barrier — no flameproof enclosure needed. Diaphragm material is AISI 316L SST (1.4435) with silicone oil fill, NACE compliant for sour-gas environments. Bolts are AISI 316 SST (NACE, not exposed to H2S), and the gaskets are Viton — explicitly suitable for oxygen applications, though the max pressure on the gasket side is 41 MPa / 410 bar / 5945 psi. Process flanges and adapters are AISI 316L SST (1.4404 / 1.4408) with 1/2 in –14 NPT female through adapter, horizontal connection. Housing is aluminum alloy barrel type with M20 x 1.5 electrical connection. An inspection certificate 3.1 per EN 10204 of calibration ships with the unit — that's the mill-test-report-level traceability that quality-doc control wants for a FAT package. Estimated lead time from the factory runs 10 to 12 weeks.","metaTitle":"266MSTFCSB3B1E1L1B1C1M5 Differential Pressure Transmitter, H","metaDescription":"266MSTFCSB3B1E1L1B1C1M5 differential pressure transmitter with HART digital communication and 4-20 mA output. Sensor span 0.4-40 kPa, max working pressure 160 bar, ATEX Ex ia. Sour","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Differential Pressure Transmitters"],"specifications":{"title":"266MSTFCSB3B1E1L1B1C1M5","Output":"1 - HART digital communication and 4 to 20 mA","Weight":"4.35 kg","Product No.":"266MSTFCSB3B1E1L1B1C1M5","description":"266MST Differential Pressure Transmitters","Certificates":"C1 - Inspection certificate 3.1 acc. EN 10204 of calibration","Integral LCD":"L1 - With integral LCD display","Product Type":"266MST Differential Pressure Transmitters","Shipping Weight":"8 kg","lifecycle_stage":"current","Sensor Span Limits":"F - 0.4 and 40 kPa (4 and 400 mbar, 1.6 and 160 inH2O)","Estimated Lead Time":"10 - 12 weeks.","Maximum Working Pressure":"C - 16 MPa / 160 bar / 2320 psi (Not available with Sensor Span Limits code A)","Operating Instruction Language":"M5 - English","Diaphragm Material / Fill Fluid":"S - AISI 316L SST (1.4435) / Silicone oil (NACE)","Bolts Material / Gaskets Material":"3 - AISI 316 SST (NACE – not exposed to H2S) / Viton (Suitable for oxygen applications) (Max. 41 MPa / 410 bar / 5945 psi)","Mounting Bracket Shape / Material":"B1 - For pipe mounting / Carbon steel (Not suitable for AISI housing)","Explosion Protection Certification":"E1 - ATEX Intrinsic Safety Ex ia","Housing Material / Electrical Connection":"B - Aluminum alloy (Barrel type) / M20 x 1.5","Process Flanges and Adapters Material / Connection":"B - AISI 316L SST (1.4404 / 1.4408) / 1/2 in –14 NPT female through adapter (horizontal connection) (NACE)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3,264.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/48043aaf6dc9efa60ca318542047b9e0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the output of 266MSTFCSB3B1E1L1B1C1M5?","answer":"The output is 1 – HART digital communication and 4 to 20 mA analog signal, giving both the process variable and digital diagnostics on the same two wires."},{"question":"What is the sensor span and max working pressure?","answer":"Sensor span limits are 0.4 to 40 kPa (4 to 400 mbar, 1.6 to 160 inH2O). Maximum working pressure is 16 MPa / 160 bar / 2320 psi."},{"question":"What hazardous-area approvals does this transmitter carry?","answer":"Explosion protection certification is ATEX Intrinsic Safety Ex ia (code), suitable for Zone 0/1 loops with an appropriate barrier."},{"question":"Where can I buy 266MSTFCSB3B1E1L1B1C1M5 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/266MSTFCSB3B1E1L1B1C1M5","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/abb/266MSTFCSB3B1E1L1B1C1M5 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}