HONEYWELL LG1093AA26 Analog Output Module

1. Product Description

A Honeywell pressure transmitter is an electronic device used to measure the pressure of a fluid (liquid or gas) and convert this measurement into a standardized electrical signal (most commonly 4-20 mA, but also available in digital formats like HART, Foundation Fieldbus, or Profibus). This signal can then be transmitted over a distance to a control system, monitor, or indicator for process control, monitoring, or data logging. Honeywell offers a diverse portfolio of pressure transmitters suitable for various industrial applications, covering ranges from low pressure to high pressure, absolute, gauge, and differential pressure measurements. They are known for their reliability, accuracy, and robust construction.

2. Product Parameters (Typical Examples - Vary by Model)

• Measurement Type: Gauge, Absolute, Differential, Sealed Gauge

• Pressure Range: Highly variable, examples: -1 to 1 psi, 0 to 30 psi, 0 to 1000 psi, 0 to 5000 psi, up to 10,000 psi or higher depending on the model.

• Accuracy: Typically specified as a percentage of the measured value or full scale (e.g., ±0.07% FS, ±0.1% FS, ±0.2% FS).

• Output Signal: 4-20 mA DC (standard), with optional HART protocol communication; also available in digital bus protocols (Fieldbus, Profibus).

• Supply Voltage: Typically 12-42 VDC or 15-30 VDC (check specific model).

• Temperature Range:

• Operating Temperature: Often -40°C to +85°C (-40°F to +185°F), but can vary significantly (e.g., -25°C to +70°C).

• Compensation Range: The range over which the accuracy is guaranteed (may be narrower than the operating range).

• Process Connection: Various options like 1/4" NPT, 1/2" NPT, 3/4" NPT, or other metric threads, depending on the model and series.

• Sensor Technology: Commonly uses piezoresistive silicon, ceramic, or capacitive sensing elements.

• Material Compatibility: Wetted parts (in contact with the process fluid) are often made of 316 Stainless Steel, Hastelloy, Titanium, or other materials depending on the model and application requirements (e.g., for corrosive media).

• Calibration: Often includes features like zero and span adjustment, sometimes field-adjustable or factory-calibrated.

• Environmental Protection: IP rating (e.g., IP65, IP67, IP68) indicating protection against dust and water ingress.

3. Product Advantages

• Reliability: Honeywell is a well-established brand known for manufacturing durable and dependable industrial sensors.

• Accuracy and Stability: Offers high accuracy and long-term stability across a wide range of operating conditions.

• Robust Construction: Designed to withstand harsh industrial environments, often featuring overpressure protection and vibration resistance.

• Wide Range of Options: Available in various pressure ranges, measurement types, connection types, and materials to suit diverse applications.

• Integration Capabilities: Supports common process control signals (4-20 mA) and digital communication protocols (HART, Fieldbus) for easy integration into existing systems.

• Compliance: Often meets industry standards and certifications (e.g., ATEX, IECEx for hazardous areas, FM approval).

• Global Support: Benefit from Honeywell’s global presence, technical support, and service network.

4. Precautions

• Correct Pressure Range: Never expose the transmitter to pressures exceeding its maximum rated pressure or overpressure protection limit. This can cause permanent damage.

• Media Compatibility: Ensure the wetted parts (diaphragm, housing) are compatible with the process fluid (chemical resistance, temperature). Consult the datasheet for material compatibility charts.

• Installation: Install the transmitter correctly according to the manual. Consider orientation (especially for gauge pressure) and potential for condensation or vapor lock. Use appropriate seals and fittings.

• Temperature Limits: Operate within the specified temperature range. Exceeding the compensation range can lead to reduced accuracy or damage.

• Electrical Safety: Follow proper electrical wiring procedures. Ensure the power supply voltage matches the transmitter’s requirements. Isolate power before performing maintenance.

• Hazardous Areas: Use only transmitters specifically certified for the hazardous area classification where they will be installed (e.g., Class/Division, Group/Temp).

• Vibration and Shock: Mount the transmitter securely to minimize the effects of vibration and mechanical shock, which can affect readings or cause damage.

• Cavitation and Flashing: Avoid installing the transmitter in locations where the process fluid might experience cavitation or flashing, as this can damage the sensing element.

5. Product Applications

Honeywell pressure transmitters are used in a vast array of industries and applications, including:

• Oil & Gas: Monitoring pressures in pipelines, wellheads, separators, tanks, and processing units.

• Chemical & Petrochemical: Controlling pressures in reactors, storage tanks, pumps, and pipelines handling various chemicals.

• Water & Wastewater: Measuring tank levels (via hydrostatic pressure), filter differentials, pump discharge pressures, and flow rates.

• Power Generation: Monitoring boiler pressures, steam lines, condenser levels, and fuel delivery systems.

• Food & Beverage: Measuring pressures in processing tanks, CIP (Clean-In-Place) systems, and packaging lines, often requiring hygienic designs.

• Pharmaceuticals: Ensuring precise pressure control in reactors, storage tanks, and filtration systems in cleanroom environments.

• Manufacturing & Automation: Monitoring hydraulic and pneumatic pressures, tank levels, and machine performance.

• HVAC/R: Measuring refrigerant pressures, chilled water pressures, and air pressures in building systems.

• Pulp & Paper: Monitoring pressures in stock preparation, refining, and paper machine processes.

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