Yokogawa ALR121-S00 Pressure Transmitter | Absolute Pressure, 4-20mA+HART

Yokogawa ALR121-S00 Pressure Transmitter | Absolute Pressure, 4-20mA+HART

Yokogawa ALR121-S00 pressure transmitter specifications. Absolute pressure measurement, 4-20mA+HART output, general purpose.

Product Overview

The Yokogawa ALR121-S00 is an absolute pressure transmitter designed for precise pressure measurement referenced to a perfect vacuum. It converts applied absolute pressure into a standardized 4-20mA analog signal with superimposed HART digital communication. Utilizing Yokogawa's silicon resonant sensor technology, it delivers high accuracy and long-term stability for applications in industrial processes, particularly where measurement is independent of atmospheric pressure changes.

Technical Specifications

Key Features

• Silicon Resonant Sensor:​ Provides high accuracy, stability, and repeatability

• Absolute Pressure Reference:​ Measures pressure relative to a vacuum, unaffected by barometric changes

• HART Communication:​ Enables remote configuration, calibration, and diagnostics

• Robust Construction:​ Durable design for harsh industrial environments

• High Overpressure Protection:​ Withstands high overpressure without damage

• Easy Configuration:​ Local zero and span adjustment or configuration via HART

• Self-Diagnostics:​ Continuous monitoring of transmitter health

• Wide Turndown Ratio:​ High flexibility in range selection

• Global Certifications:​ Approved for use in hazardous areas worldwide

Applications

• Distillation column pressure measurement

• Vacuum system monitoring

• Pressure measurement in closed, non-vented vessels

• Process applications requiring pressure independent of atmospheric conditions

• General industrial absolute pressure monitoring in chemical, pharmaceutical, and semiconductor industries

Important Notes

1. The specific absolute pressure range and process connection are defined by the model suffix

2. Requires a minimum loop resistance (typically 250Ω) for HART communication

3. Measures pressure relative to a vacuum (0 kPa abs)

4. Sensor must be compatible with the process media (corrosion, temperature)

5. Proper mounting and impulse piping are critical for accurate measurement

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About ACH

Founded in 2012, ACH is a top-tier distributor of industrial automation products, supplying genuine devices from leading brands like ABB, P+F, E&H, AB, MTL and EMERSON to emerging markets worldwide. Our mission is to provide 100% Genuine products at the most competitive prices, helping customers reduce costs and strengthen their market position.

Frequently Ask & Questions

Are preferential prices available?

Long-term brand partners can get competitive product prices. At the same time, ACH controls the profit per order to 5%, providing the most competitive prices.

Are the Products Genuine OEM Units?

Yes, all products from ACH are certified genuine OEM units. We acquire our inventory through official OEM channels and trusted third-party suppliers, ensuring every item is authentic and reliable.

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What is the warranty of goods?

One-year Warranty.

How long is the logistics cycle of the product?

Products are divided into spot and futures, and the delivery period of different brands of products is also different. For details, please contact the ACH business manager.