ABB 266DSH Differential Pressure Transmitter

The ABB 266DSH Differential Pressure Transmitter is a state-of-the-art process instrument designed to meet the rigorous demands of industrial automation and measurement. Engineered for precision and durability, this transmitter accurately measures differential pressure, level, flow, and density across a wide spectrum of industrial media, including liquids, gases, and steam.

Advanced Sensor Technology and High Precision

At the core of the 266DSH lies ABB’s proven sensor technology, which combines micro-machined silicon piezoresistive and capacitive measurement cells. This design delivers an exceptional base accuracy starting from 0.06% of the calibrated span. It features remarkable turndown capability up to 100:1, allowing users to scale the instrument to diverse process ranges without sacrificing measurement fidelity. Furthermore, excellent long-term stability ensures minimal drift over extended operational cycles, reducing maintenance overhead and calibration frequency.

Robust Overload and Environmental Performance

Industrial environments demand resilience, and the 266DSH excels with high static pressure limits (up to 41 MPa / 5945 psi for standard or high static models) and exceptional overpressure capability. Built with robust wisted-housing designs and high-grade wetted materials (such as Hastelloy, Monel, and Stainless Steel 316L), the transmitter withstands aggressive chemical media and corrosive atmospheres. It operates reliably across a broad ambient temperature range, supported by advanced thermal error compensation that minimizes temperature-induced drift.

Flexible Digital Communication Protocols

To integrate smoothly into diverse control architectures, the ABB 266DSH supports multiple industry-standard communication protocols:

• HART® Protocol: Enables remote configuration, diagnostic monitoring, and 4 to 20 mA analog output integration.

• PROFIBUS PA®: Provides digital communication tailored for complex process automation networks.

• FOUNDATION Fieldbus™: Facilitates interoperability in advanced, fully digitized plant environments.

• WirelessHART: Offers cable-free installation flexibility for hard-to-reach measurement points.

Applications

• Oil & Gas Industry: Flow measurement, wellhead monitoring, and pipeline pressure differential control.

• Chemical & Petrochemical Plants: Level monitoring in closed or pressurized vessels, reaction tracking, and corrosive media handling.

• Power Generation: Steam boiler control, feedwater monitoring, and condenser vacuum measurement.

• Water & Wastewater Treatment: Filtration monitoring, flow rate tracking, and basin level measurement.

• General Industrial Processes: Differential pressure drop monitoring across filters, heat exchangers, and industrial machinery.

Technical Specifications

• Base Accuracy: From 0.06% of calibrated span (optional high-accuracy versions available).

• Turndown Ratio: Up to 100:1.

• Measurement Span Limits: From 0.5 kPa to 16000 kPa (depending on model range, e.g., 5 mbar to 160 bar / 2 inH2O to 2320 psi).

• Maximum Working Pressure (Static Pressure): Up to 41 MPa (5945 psi).

• Output Protocols: 4 to 20 mA with HART, PROFIBUS PA, FOUNDATION Fieldbus, WirelessHART.

• Power Supply: 10.5 to 42 V DC (varies by protocol; intrinsically safe models operate within specific barrier limits).

• Ambient Temperature Range: -40 °C to 85 °C (-40 °F to 185 °F); LCD indicator operational limits apply.

• Process Temperature Limits: Up to 121 °C (250 °F) standard, with higher limits for remote seal options.

• Wetted Materials: Stainless Steel (316L), Hastelloy C-276, Monel, Tantalum.

• Enclosure Material: High-quality aluminum alloy or stainless steel with polyurethane or epoxy-polyester finish.

• Ingress Protection (IP Rating): IP67 / NEMA 4X.

• Certifications & Approvals: ATEX, IECEx, FM, CSA, SIL 2 / SIL 3 functional safety, NACE MR0175 / MR0103 compliance.

FAQ

Q1: What media can the ABB 266DSH differential pressure transmitter measure? A: The 266DSH is designed to measure liquids, gases, and steam in industrial process applications.

Q2: What communication protocols does the 266DSH support? A: It supports 4 to 20 mA with HART, PROFIBUS PA, FOUNDATION Fieldbus, and WirelessHART protocols.

Q3: Is the ABB 266DSH certified for use in hazardous locations? A: Yes, it holds comprehensive international hazardous area approvals including ATEX, IECEx, FM, and CSA for explosive gas and dust atmospheres.

Q4: What is the base measurement accuracy of the 266DSH? A: The base accuracy starts from 0.06% of the calibrated span.

Q5: Can the transmitter be used in functional safety loops? A: Yes, the 266DSH is certified for functional safety applications up to SIL 2 and SIL 3 (IEC 61508).

Product documents

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