ABB MEASUREMENT & ANALY TICS | DATA SHEET 266DSH Differential pressure transmitters

Measurement made easy

Engineered solutions for all applications

Base accuracy

• from 0.06 % of calibrated span (optional 0.04 %)

Reliable sensing system coupled with very latest digital technologies

• provides large turn down ratio up to 100:1

Comprehensive sensor choice

• optimize in-use total performance and stability

10–year stability

• 0.15 % of URL

Flexible configuration facilities

• provided locally via local LCD keypad

TTG (Through-The-Glass) keypad technology

• allows quick and easy local configuration without opening the cover, 

even in explosion proof environments

IEC 61508 certification 

• version for SIL2 (1oo1) and SIL3 (1oo2) applications

PED compliance

• Category III for PS > 20 MPa, 200 bar

• Sound Engineering Practice (SEP) for PS ≤ 20 MPa, 200 bar

WirelessHART version 

• the battery powered solution compliant to IEC 62591

Best-in-class battery life

• up to 10 years @ 32 s update time

• in-field replaceable

Product in compliance with Directive 2011/65/UE (RoHS II)

In-built advanced diagnostics

Specification – functional

Range and span limits

Sensor 

code

Upper range limit

(URL)

Lower range limit 

(LRL)

Minimum 

measuring span

A 1 kPa

10 mbar

4 inH2O

–1 kPa

–10 mbar

–4 inH2O

0.05 kPa

0.5 mbar

0.2 inH2O

B 4 kPa

40 mbar

16 inH2O

–4 kPa

–40 mbar

–16 inH2O

0.2 kPa

2 mbar

0.8 inH2O

E 16 kPa

160 mbar

64 inH2O

–16 kPa

–160 mbar

–64 inH2O

0.54 kPa

5.4 mbar

2.16 inH2O

F 40 kPa

400 mbar

160 inH2O

–40 kPa

–400 mbar

–160 inH2O

0.4 kPa

4 mbar

1.6 inH2O

H* 160 kPa

1600 mbar

642 inH2O

–160 kPa

–1600 mbar

–642 inH2O

1.6 kPa

16 mbar

6.4 inH2O

M* 600 kPa

6 bar

87 psi

–600 kPa

–6 bar

–87 psi

6 kPa

0.06 bar

0.87 psi

P* 2400 kPa

24 bar

348 psi

–2400 kPa

–24 bar

–348 psi

24 kPa

0.24 bar

3.5 psi

Q* 8000 kPa

80 bar

1160 psi

–8000 kPa

–80 bar

–1160 psi

80 kPa

0.8 bar

11.6 psi

S* 16000 kPa

160 bar

2320 psi

–16000 kPa

–160 bar

–2320 psi

160 kPa

1.6 bar

23.2 psi

* For 266DSH gauge version the LRL for sensors H, M, P, Q, S is 1 kPa abs / 

10 mbar abs / 0.15 psia

Span limit

Maximum span = URL

(can be further adjusted up to ± URL (TD = 0.5) for 

differential models, within the range limits)

IT IS RECOMMENDED TO SELECT THE TRANSMITTER 

SENSOR CODE PROVIDING THE TURNDOWN VALUE AS 

LOWEST AS POSSIBLE TO OPTIMIZE PERFORMANCE 

CHARACTERISTICS.

Zero suppression and elevation

Zero and span can be adjusted to any value within the 

range limits detailed in the table as long as:

– calibrated span ≥ minimum span

Damping (feature not available for WirelessHART version)

Selectable time constant : between 0 and 60 s

This is in addition to sensor response time.

Turn on time

Operation within specification in less than 10 s with 

minimum damping.

Insulation resistance 

> 100 MΩ at 500 V DC (terminals to earth)

Specification – operative limits

Pressure limits

Overpressure limits

The differential pressure transmitters, models 266DSH, 

work without damage within the following pressure limits:

Sensors Fill fluid Overpressure limits

Sensor F to S Silicone oil 0.07 kPa abs, 0.7 mbar abs, 0.5 mmHg 

and 21 MPa, 210 bar, 3045 psi *, **

Sensor E Silicone oil 0.07 kPa abs, 0.7 mbar abs, 0.5 mmHg 

and 16 MPa, 160 bar, 2320 psi * 

Sensor B Silicone oil 0.07 kPa abs, 0.7 mbar abs, 0.5 mmHg 

and 7 MPa, 70 bar, 1015 psi * 

Sensor A Silicone oil 0.07 kPa abs, 0.7 mbar abs, 0.5 mmHg 

and 2 MPa, 20 bar, 290 psi * 

Sensor F to S Inert 

(Galden)

0.135 kPa abs, 1.35 mbar abs, 1 mmHg 

and 21 MPa, 210 bar, 3045 psi *, **

Sensor E Inert 

(Galden)

0.135 kPa abs, 1.35 mbar abs, 1 mmHg 

and 16 MPa, 160 bar, 2320 psi * 

* 1 MPa, 10 bar, 145 psi for Kynar-PVDF

** 16 MPa, 160 bar, 2320 psi for AISI 316 ss NACE “exposed bolting“

For flange mounted version

Flange Fill fluid Overpressure limits

ASME B16.5 

Class 150

Silicone oil 0.07 kPa abs, 0.7 mbar abs, 0.5 mmHg 

and 230 psi

ASME B16.5 

Class 300

Silicone oil 0.07 kPa abs, 0.7 mbar abs, 0.5 mmHg 

and 600 psi

EN 1092-1 PN 16 Silicone oil 0.07 kPa abs, 0.7 mbar abs, 0.5 mmHg 

and 13.5 bar

EN 1092-1 PN 40 Silicone oil 0.07 kPa abs, 0.7 mbar abs, 0.5 mmHg 

and 33.8 bar

ASME B16.5 

Class 150

Inert 

(Galden)

0.135 kPa abs, 1.35 mbar abs, 1 mmHg 

and 230 psi

ASME B16.5 

Class 300

Inert 

(Galden)

0.135 kPa abs, 1.35 mbar abs, 1 mmHg 

and 600 psi

EN 1092-1 PN 16 Inert 

(Galden)

0.135 kPa abs, 1.35 mbar abs, 1 mmHg 

and 13.5 bar

EN 1092-1 PN 40 Inert 

(Galden)

0.135 kPa abs, 1.35 mbar abs, 1 mmHg 

and 33.8 bar

Static pressure limits

The differential pressure transmitters, models 266DSH 

work within specifications between the following limits:

Sensors Static pressure limits

Sensor F to S 1.3 kPa abs, 13 mbar abs, 0.2 psia 

and 21 MPa, 210 bar, 3045 psi *, ** 

Sensor E 1.3 kPa abs, 13 mbar abs, 0.2 psia 

and 16 MPa, 160 bar, 2320 psi * 

Sensor B 1.3 kPa abs, 13 mbar abs, 0.2 psia 

and 7 MPa, 70 bar, 1015 psi * 

Sensor A 1.3 kPa abs, 13 mbar abs, 0.2 psia 

and 2 MPa, 20 bar, 290 psi * 

* 1 MPa, 10 bar, 145 psi for Kynar-PVDF

** 16 MPa, 160 bar, 2320 psi for AISI 316 ss NACE “exposed bolting“

Flange Static pressure limits

ASME B16.5 Class 150 1.3 kPa abs, 13 mbar abs, 0.2 psia and 230 psi

ASME B16.5 Class 300 1.3 kPa abs, 13 mbar abs, 0.2 psia and 600 psi