HART Pressure Transmitter

More details

New product
More info

The model LD291 - HART® Pressure Transmitter offers digital HART based communication simplifying calibration and providing remote diagnostics. Its microprocessor-based electronics allow for total interchangeability with SMAR capacitive sensor. It automatically corrects sensor characteristic changes caused by temperature fluctuations. 

Parameterization and Diagnostics

LD291 - HART® Pressure Transmitter can be configured by:

  • SMAR CONF401 for Windows;
  • SMAR DDCON100 for Windows;
  • SMAR HPC301 and HPC401 for several models of Palms*;
  • Other manufacturers' configuration tools based on DD (Device Description) or DTM (Device Type Manager), such as AMSTM, FieldCareTM, PACTwareTM, HHT275 and HHT375, PRM Device Viewer. For LD291 management and diagnostics, AssetView ensures continuous information monitoring.

* Requires HPI311.


  • Updating time of output current in 100ms;
  • Improved performance due to dedicated math co-processor;
  • FMEDA (Failure Modes, Effects and Diagnostic) Analysis;
  • MTBF (Mean Time Between Failures) of 239 years;
  • MTTR (Mean Time to Repair) of 18 minutes;
  • MTTF (Mean Time to Failure) of 239 years;
  • Applicable in safety areas according to SIL (Safety Integrity Level) requirements;
  • Write protection by hardware;
  • Designed and manufactured according to ISO 9001 standards.
  • Zero, span and damping adjustment through HART® local switches (only if fitted with display);
  • Easy update for FOUNDATIONTM fieldbus and PROFIBUS PA technologies.


Two-wire, 4-20 mA with HART superimposed digital communication signal


0 to 25 MPa (3600 psi)


Accepts calibration from URL to URL/40


± 0.075% of calibatred span

Power Supply

12-45 Vdc

Update Output Current

100 ms


Analysis done by Exida


239 years




With reference and without reference

Access Protection

Yes, by hardware


Yes, by LCD


Optional 41/2-digit numerical and 5-character alphanumerical LCD indicator

Only Electronic Board

Only electronic board with math co-processor high-performance, interchangeable on all models.

Update for FOUNDATION fieldbus and PROFIBUS PA

With the simple exchange of the main electronic board can be easily converted to these digital protocols.

Temperature Limits

- 40 to 85°C (-40 to 185 °F)

- 40 to 100°C (-40 to 212 °F) (Silicon Oil)
- 0 to 85°C (32 to 185 °F) (Inert Fluorolube Oil)
-25 to 85 ºC (-13 to 185 º F) (Viton O´Ring)

- 40 to 100°C (-40 to 212 °F)

- 10 to 60 ºC (14 to 140 º F) (Operation)
- 20 to 80°C (-4 to 176 °F)
- 40 to 85°C (-40 to 185 °F) (Without Damages)

Process Temperature Limits

-40 to 100 ºC (-40 to 212 ºF) (Silicone Oil)
0 to 85 ºC (32 to 185 ºF) (Fluorolube Oil)

Ambient Humidity Limits

0 to 100% RH


Injected low copper aluminum with polyester painting or 316 stainless steel housing. According to the NEMA 4X, IP66.

Wetted Parts

316L SST, Hastelloy C276

Nonwetted Parts

Injected aluminum with polyester painting or 316 SST

Hazardous Area Certification

Intrinsic Safe (FM, CSA, Nemko, Dekra/EXAM, Cepel and NEPSI), non-incendive (FM, CSA and Cepel), explosion proof (FM, Nemko and Cepel) and dust ignition proof (FM).


Less than 2.0 kg (4 lb)

Contact Us

“Industrial Technical Services is a single source Instrumentation and Automation company. We provide certified calibrations, PLC programming, custom controls and Panels”.


Please fill details below and one of our representative will contact you shortly. 

18 other products in the same category: