The LD290 Series are an economical alternative gage pressure transmitter. It is based on a field-proven capacitive sensor that provides reliable operation and high performance.

Features:

• 0 ~ 125 Pa to 0 ~ 25 MPa
• 0 ~ 0.5 inH20 to 0 ~ 3600 psi
• ± 0.075% Accuracy
• 40:1 Rageability
• Wetted parts in 316 SS, Hastelloy
• Totally digital; including sensor, electronics and communication (Except LD290 - Pressure Transmitter)
• Digital LCD display
• Weather proof, explosion proof and intrinsically safe
• Self diagnostics
• Four options of technology

	LD290 Pressure Transmitter - 4 a 20 mA

• Updating time of output current in 100 ms;
• With high performance mathematical co-processor;
• Digital electronics and sensor;
• Weather proof, explosion proof and intrinsically safe;
• 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.

	LD291 - HART® - 4 a 20 mA Pressure Transmitter

• 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 FOUNDATION^TM fieldbus and PROFIBUS PA technologies.

	LD292 - FOUNDATIONTM fieldbus Pressure Transmitter

• Instantiation and deletion of function blocks;
• Network master capability;
• Easy update for HART^® and Profibus PA technologies.

	LD293 - PROFIBUS PA Pressure Transmitter

• Use of the Analog Input function;
• Easy firmware upgrade (via Flash Memory Interface);
• Easy update to FOUNDATION^TM fieldbus and HART^® protocol.

Transmitters Types:

• Gage Pressure – LD290:
  The model LD290 is a pure 4-20 mA transmitter. Even though it has only analog input, its microprocessor-based electronics allow for total interchangeability with SMAR capacitive sensors. It automatically corrects sensor characteristics changes caused by temperature fluctuations.

• Gage Pressure - LD291, LD292 e LD293:
  The models LD291, LD292 and LD293 offer digital communication based in HART^®, FOUNDATION^TM fieldbus and PROFIBUS PA - protocols, simplifying calibration and providing remote diagnostics. Their microprocessor-based electronic circuit allows for total interchangeability with SMAR capacitive sensors.

Applications with Manifold Valves:

SMAR Manifold Valves provide all of the necessary safety for field maintenance of LD290 Series transmitters. Working at pressures up to 6,000 psi, they are easy to handle and lighter than others in the market.

Pressure and leakage tests carried out in 100% of the valves, also for models mounted on the transmitter. For further information, please see the SMAR Manifold Valves Catalog.

Applications with Sanitary Transmitters:

LD290S, LD291S, LD292S and LD293S are specially designed for food and other applications where sanitary connections are required. With threaded or “tri-clamp” connections, it allows for easy and quick maintenance and cleaning. Tri-clamp and other connections are compliant to 3A-7403 standard for food grade applications. For further information, see the SMAR SR301 Series Catalog.