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ABB 266DRHFSRRSA7E8LSB2I2 Differential Pressure Transmitter with Remote Seals | F-Range 0-40kPa | Dual Remote Seals | 1m Capillary | HART | Order Available

Original ABB 266DRHFSRRSA7E8LSB2I2 differential pressure transmitter with remote diaphragm seals, F-range sensor, 0.4-40kPa differential pressure range, max 0-2m water column for level measurement. Equipped with dual remote seals (high side S26WAHD5FSM1ACSNNN + low side S26WALD5FSM1ACSNNN thin diaphragm), 1m capillary length. Base accuracy ±0.06%, 4-20mA+HART output, 316L stainless steel wetted parts, PED Category III compliant. Suitable for flow, level, density measurement of liquids, gases, s

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Product Details

1. Product Overview

The ABB 266DRHFSRRSA7E8LSB2I2 is a differential pressure transmitter with remote diaphragm seals from the ABB 266 series, model 266DRH, designed for differential pressure, level, and flow measurement applications requiring remote mount installation. This transmitter is equipped with a dual remote seal system, transferring process pressure to the transmitter sensor via capillary tubes, suitable for measuring high-temperature, corrosive, high-viscosity, crystallizing, or solids-containing media.

This transmitter uses an F-range sensor with a differential pressure measurement range of 0.4-40 kPa (4-400 mbar), and a maximum level measurement range of 0-2 meters water column (depending on medium density). Base accuracy is as high as ±0.06%, with a 100:1 turndown, providing excellent measurement stability and long-term reliability.

The transmitter is equipped with a dual remote seal system: high side S26WAHD5FSM1ACSNNN standard diaphragm remote seal, low side S26WALD5FSM1ACSNNN thin diaphragm remote seal, both with 1-meter capillary length. Wetted materials are 316L stainless steel with silicone oil fill fluid, suitable for most industrial process media.

Important Model Change Notice: According to the Shanghai ABB production line notification, the original remote seal models (SL version, such as S26WAHD5FSL1ACSNNN, S26WALD5FSL1ACSNNN) have been discontinued and are now uniformly changed to the SM version (S26WAHD5FSM1ACSNNN, S26WALD5FSM1ACSNNN). The new model has a capillary length of 1 meter, and the transmitter maximum range is 0-2 meters water column (level measurement) or 0-40 kPa (differential pressure measurement, F-range).

This transmitter outputs a 4-20mA signal superimposed with HART protocol, supporting HART communication, remote configuration, and diagnostics, and complies with PED (Pressure Equipment Directive) Category III requirements. It is widely used in process measurement and control in industries such as petrochemical, power, metallurgy, pharmaceutical, and food & beverage.

2. Specifications

表格

Parameter	Value
Brand	ABB (Switzerland/Germany)
Model	266DRHFSRRSA7E8LSB2I2
Product Type	Differential Pressure Transmitter with Remote Diaphragm Seals
Series	266 Series
Sensor Code	F-range
Differential Pressure Range	0.4 - 40 kPa (4 - 400 mbar, 1.6 - 160 inH2O)
Max Level Measurement Range	0 - 2 m water column (depending on medium density)
Lower Range Limit (LRL)	-40 kPa
Upper Range Limit (URL)	+40 kPa
Minimum Span	0.4 kPa
Base Accuracy	±0.06% (±0.04% optional)
Turndown	100:1
Stability	0.2% URL / 10 years (to be confirmed)
Output Signal	4-20mA + HART protocol
Communication Protocol	HART 7 (PROFIBUS PA, FOUNDATION Fieldbus, WirelessHART optional)
Supply Voltage	12 - 42 V DC (typical 24V DC)
Load Resistance	0 - 1350 Ω (@24V DC)
Ambient Temperature	-40°C ~ +85°C (to be confirmed, may be reduced with display)
Process Temperature	Depends on remote seal and fill fluid, typically -40°C ~ +200°C (to be confirmed)
Static/Working Pressure	Depends on remote seal pressure rating (to be confirmed)
Wetted Material (Diaphragm)	316L stainless steel
Wetted Material (Flange)	316/316L stainless steel (to be confirmed)
Fill Fluid	Silicone oil
Remote Seal (High Side)	S26WAHD5FSM1ACSNNN (standard diaphragm)
Remote Seal (Low Side)	S26WALD5FSM1ACSNNN (thin diaphragm)
Capillary Length	1 meter (both sides)
Capillary Material	316L stainless steel (to be confirmed)
Housing Material	Aluminum alloy (standard), stainless steel optional
Housing Protection	IP66 / IP67 / NEMA 4X
Explosion-proof Certification	ATEX, IECEx, FM, CSA, NEPSI optional (whether this model includes certification to be confirmed)
Display	Local LCD display optional (to be confirmed)
Certifications	PED Category III, CE
Weight	To be confirmed (transmitter approx. 1.5-2 kg, remote seals additional)
Country of Origin	Shanghai, China (Shanghai ABB factory)
Model Change Note	Original SL remote seals discontinued, changed to SM
Stock Status	Order available

3. Key Features

High Precision Measurement — Base accuracy up to ±0.06%, 100:1 turndown, excellent measurement accuracy and long-term stability, suitable for industrial process control applications requiring high measurement precision.
Dual Remote Seal Design — Equipped with dual remote diaphragm seal system (high side standard diaphragm + low side thin diaphragm), connected to transmitter via 1-meter capillary, can be directly installed on tanks, pipes, and reactors, suitable for high-temperature, corrosive, high-viscosity, crystallizing media.
F-Range Low DP Sensor — F-range sensor with 0.4-40 kPa range, designed for low differential pressure and low level measurement, max level 0-2 meters water column, suitable for small tanks, closed vessels, and low DP flow measurement.
Thin Diaphragm Low Side Design — Low side uses thin diaphragm (S26WALD5) design, reducing static pressure influence, improving level measurement accuracy, especially suitable for closed vessel level and interface measurement.
HART Communication Protocol — 4-20mA superimposed with HART protocol output, supports HART communicator and asset management software for remote configuration, calibration, and diagnostics, facilitating system integration and maintenance.
Stainless Steel Wetted Materials — Wetted parts use 316L stainless steel diaphragms and flanges with silicone oil fill, resistant to most corrosive media, suitable for petrochemical, pharmaceutical, food industries.
Wide Temperature Range High Protection — Wide ambient temperature range, housing protection IP66/IP67/NEMA 4X, reliable operation in outdoor, humid, dusty harsh environments.
PED Category III Certification — Complies with Pressure Equipment Directive (PED) Category III requirements, meets EU pressure equipment safety standards, can be used in pressurized systems.
Smooth Model Change Transition — Original SL remote seals discontinued, new SM model fully replaces, compatible in function and mounting dimensions, 1m capillary, ensuring spare parts replacement for existing systems and new project selection unaffected.
ABB Original Quality — Manufactured by Shanghai ABB factory, ABB is a global leading industrial automation and measurement product manufacturer, products passed strict quality inspection, comprehensive global after-sales service network.

4. Typical Applications

Tank Level Measurement: Level, interface, and density measurement in petroleum, chemical, pharmaceutical industry tanks, especially suitable for small tanks (0-2m range)
Closed Vessel Level: Level measurement in pressurized vessels such as reactors, separators, columns, dual remote seals directly mounted
Flow Measurement: Differential pressure flow measurement with orifice plates, Venturi tubes, V-cone flow elements for liquids, gases, steam
Filter Differential Pressure Monitoring: Differential pressure monitoring of pipeline filters and cartridges, determining clogging and replacement timing
Pump Inlet/Outlet Differential Pressure: Inlet/outlet differential pressure measurement of centrifugal and positive displacement pumps, monitoring pump operating status
High Temperature Media Measurement: High-temperature media isolated via remote seals and capillary, transmitter can be installed away from high-temperature points
Corrosive Media Measurement: 316L stainless steel wetted materials, suitable for level and differential pressure measurement of acids, alkalis, and other corrosive media
High Viscosity/Crystallizing Media: Remote seals directly mounted, no impulse line clogging issues, suitable for high-viscosity, crystallizing, solids-containing media
Food & Beverage Industry: Hygienic applications (need to confirm if remote seals are hygienic type), level and flow measurement
Power Industry: Boiler drum water level, deaerator level, condenser vacuum measurement
Metallurgy Industry: Cooling water systems, hydraulic system level and differential pressure measurement
Other differential pressure/level measurement applications requiring remote mount installation

5. Model Explanation

Complete Model: 266DRHFSRRSA7E8LSB2I2

Model code breakdown (main parts):

266: 266 series pressure transmitter
D: Differential pressure measurement
R: With remote seal
H: HART communication protocol
F: Sensor code F = 0.4-40 kPa range
S: Diaphragm material 316L stainless steel
R: Fill fluid (silicone oil)
RSA7E8LSB2I2: Remote seal system configuration code (dual remote seals, capillary, mounting, etc.)

配套 Remote Seal Models (New, SM Version):

High side: S26WAHD5FSM1ACSNNN (standard diaphragm remote seal)
Low side: S26WALD5FSM1ACSNNN (thin diaphragm remote seal)

Original Remote Seal Models (Discontinued, SL Version):

High side: S26WAHD5FSL1ACSNNN
Low side: S26WALD5FSL1ACSNNN (thin diaphragm, Shanghai ABB factory already produced)

Model Change Key Points:

Reason: Original SL remote seals discontinued
Change: SL → SM
Capillary length: 1 meter
Max range: 0-2m water column (level) / 0-40 kPa (differential pressure, F-range)

6. Installation & Usage Instructions

Installation Notes:

Dual remote seals should be installed at the same horizontal level (for level measurement), or as required by process
Capillary should avoid high-temperature sources, mechanical damage, and sharp bending, bending radius not less than specified
Transmitter should be installed in a location convenient for maintenance and reading, within specified ambient temperature range
High side (H) connects to lower part of vessel or high pressure end, low side (L) connects to upper part or low pressure end
Before installation, confirm remote seal pressure rating and process connection dimensions match process piping

Range Setting:

For level measurement, set transmitter range based on medium density, installation height, and range requirements
For differential pressure measurement, set based on actual DP range, recommended to use 30%-80% of range
F-range max DP range 40 kPa, max level 2 meters water column (water as reference medium)
Range setting and zero calibration can be performed via HART communicator or local buttons

Maintenance Recommendations:

Regularly inspect remote seals and capillary for leaks and damage
Periodically perform zero calibration and range verification (recommended annually)
Avoid mechanical damage and excessive bending of capillary
Use new SM version remote seals for spare parts replacement

7. Why Choose Us

Factory Order, Quality Guaranteed — All products sourced directly from ABB factory or authorized channels, ensuring genuine originals with factory packaging, certificates, and quality documents. Standard lead time 4-8 weeks, rush orders can be coordinated for expedited delivery.
Worldwide Delivery — Supports DHL, FedEx, UPS and other international couriers. Can also ship via your designated freight forwarder to 200+ countries.
Professional Technical Support — Selection consultation (range confirmation, remote seal configuration, capillary length selection), model change confirmation (SL→SM), technical parameter answers, and alternative model recommendation services to help you quickly identify the correct transmitter model and configuration.
Flexible Procurement — Supports small-batch sample orders and large-volume project orders with tiered pricing discounts. Project-specific quotations available.
Pre-shipment Inspection — Appearance check, packaging verification, model confirmation, and power-on test performed before shipment to ensure delivered products are intact, model-accurate, and functional.

8. Frequently Asked Questions (FAQ)

Q1: Is this model a zirconia oxygen analyzer?

A: No. The 266DRHFSRRSA7E8LSB2I2 is an ABB 266 series differential pressure transmitter with remote seals, used for measuring differential pressure, level, and flow — it is NOT a zirconia oxygen analyzer. ABB's zirconia oxygen analyzers are typically the AZ series (such as AZ20, AZ25, EasyLine O2, etc.), used for measuring oxygen content in flue gas or gases. If you need a zirconia oxygen analyzer, please provide the specific model or application scenario, and we can recommend a suitable product.

Q2: What does the model change in the documentation mean? Can I still use my original SL model?

A: According to the Shanghai ABB production line notification, the original remote seal SL models (such as S26WAHD5FSL1ACSNNN, S26WALD5FSL1ACSNNN) have been discontinued and are now uniformly changed to SM models (S26WAHD5FSM1ACSNNN, S26WALD5FSM1ACSNNN). The new SM model is a replacement for the SL version, compatible in function and mounting dimensions, with a capillary length of 1 meter. If you still have stock of the original SL model, you can continue to use it, but new purchases can only provide the SM model. It is recommended to use the new SM model for spare parts replacement and new projects.

Q3: What is the range of this transmitter? Can it measure level above 2 meters?

A: According to the documentation and model code, this transmitter uses an F-range sensor with a differential pressure measurement range of 0.4-40 kPa. For level measurement, the maximum range is 0-2 meters water column (with water as reference medium, density 1 g/cm³). If the medium density is less than water, the maximum level height will be greater than 2 meters; if the density is greater than water, the maximum level height will be less than 2 meters. If you need to measure level above 2 meters (water medium), you need to select a sensor code with a larger range (such as G-range 0-160 kPa or higher), please contact us to confirm the appropriate model.

Q4: What types are the dual remote seals? What is the difference?

A: This transmitter is equipped with dual remote seals:

High side (H): S26WAHD5FSM1ACSNNN — Standard diaphragm remote seal, for connecting to the lower part of the vessel or high pressure end, withstanding higher process pressure
Low side (L): S26WALD5FSM1ACSNNN — Thin diaphragm remote seal, for connecting to the upper part of the vessel or low pressure end (gas phase side), thin diaphragm design reduces static pressure influence and improves level measurement accuracy Both sides have 1-meter capillary length, wetted material 316L stainless steel, silicone oil fill fluid. This configuration (standard diaphragm + thin diaphragm) is especially suitable for level and interface measurement in closed vessels.

Q5: What is the output signal? Can it connect to a DCS system?

A: This transmitter output signal is 4-20mA superimposed with HART protocol. This is the most commonly used output method in industrial process control, and can be directly connected to analog input modules of most DCS, PLC, and single-loop controllers. The HART protocol allows remote configuration, calibration, and diagnostics via a HART communicator or asset management software. If your system requires PROFIBUS PA or FOUNDATION Fieldbus protocol, you can select a model with the corresponding communication protocol (need to confirm availability or lead time).

Q6: Does this product have explosion-proof certification? Can it be used in hazardous areas?

A: The 266 series transmitters can be optionally equipped with various explosion-proof certifications, including ATEX, IECEx, FM, CSA, NEPSI, etc., for use in explosive hazardous environments. However, whether this specific model (266DRHFSRRSA7E8LSB2I2) includes explosion-proof certification needs to be confirmed based on the complete model code (the model does not explicitly show an explosion-proof code). If you need to use it in a hazardous area, please specify the required explosion-proof certification type (such as intrinsic safety Ex ia, explosion-proof Ex d, etc.) and zone classification when inquiring, and we will confirm or recommend a model with explosion-proof certification.

Q7: What is the lead time? Can you provide stock?

A: This model is currently in order available status, standard lead time 4-8 weeks (ordered from ABB Shanghai factory). Differential pressure transmitters with remote seals are typically custom configurations (range, remote seals, capillary length, explosion-proof, etc.), with limited stock inventory. If you have urgent needs, we can try to coordinate stock inventory or expedited ordering. Please indicate required quantity and desired delivery time when inquiring, and we will do our best to coordinate the fastest delivery solution. For large-volume project orders, advance procurement planning is recommended.

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