BAS98ATEX3008X OTB122 ZELLWEGER Signal Converter/Transmitter

Product Description (Detailed Explanation)

The OTB122 serves as an interface and junction unit for the Searchline Excel gas detection system. Its primary role is to provide a secure environment for terminal connections and to facilitate the communication between the sensor heads (Transmitter/Receiver) and the central control system.

• Integrated Design: It often houses the electronics required to convert raw sensor signals into a standard industrial format (such as 4-20mA or digital signals).

• ATEX Certification: The “X” at the end of the certificate number (BAS98ATEX3008X) indicates that there are “Special Conditions for Safe Use,” typically relating to installation requirements or electrostatic risks.

• Ruggedized Housing: It is built to withstand extreme offshore and onshore industrial environments.

Product Parameters (Technical Specifications)

Product Advantages (Key Benefits)

• Hazardous Area Reliability: Specifically engineered for Zone 1 and Zone 2 environments, ensuring safety in the presence of explosive gases.

• Simplified Maintenance: The OTB122 provides a centralized point for testing and calibration without having to disturb the alignment of the open-path sensor heads.

• Corrosion Resistance: The high-grade material construction makes it ideal for saltwater environments (offshore platforms) and chemical plants.

• Signal Stability: Provides excellent shielding against Electromagnetic Interference (EMI), which is crucial for long-distance signal transmission in industrial sites.

Precautions (Important Notes)

• Special Conditions of Use: As per the “X” suffix in the ATEX certificate, installers must strictly follow the manual regarding cable entry types and potential static charging hazards.

• Flameproof Paths: For “Ex d” versions, ensure that the flameproof joints (threaded covers) are clean and undamaged. Never apply grease that could harden and prevent gas movement to the sensor.

• Seal Integrity: All unused cable entries must be sealed with certified Ex-rated stopping plugs to maintain the explosion-proof integrity.

• Power Down for Service: Always isolate the power before opening the enclosure in a hazardous area to prevent ignition risks.

Product Applications (Typical Use Cases)

The OTB122 is used wherever Searchline Excel systems are installed to protect large areas:

• Oil & Gas Refineries: Monitoring perimeter lines or fence-line detection for escaping hydrocarbon clouds.

• Offshore Platforms: Detecting gas leaks across production decks where point detectors might be impractical due to wind.

• LNG Terminals: Monitoring storage tanks and loading jetties for cryogenic gas leaks.

• Petrochemical Pipelines: Protecting valve stations and compressor stations along long-distance pipelines.