MBW 973-SF6 Chilled Mirror Hygrometer & Gas Analyzer
MBW Model 973-SF6 Dew Point Chilled Mirror Hygrometer: Complete Product Overview
The MBW Model 973-SF6 Dew Point Chilled Mirror Hygrometer is a high-precision analyzer designed specifically for measuring humidity, sulfur hexafluoride (SF6) purity, and sulfur dioxide (SO2) concentration in gas-insulated switchgear (GIS) systems. Built for the demanding needs of professionals in the electrical power industry, this robust and easily transportable instrument utilizes advanced condensation techniques to deliver highly accurate, reliable field measurements essential for GIS preventive maintenance.
Managing low humidity levels in SF6 gas is critical to preventing the formation of harmful corrosive compounds, making the Model 973-SF6 an indispensable tool for asset protection and operational safety.
Key Measurement Specifications & Capabilities
• Frost/Dew Point Range: Measures from -50 to +20 °C, displaying humidity parameters in units such as ppmv, ppmw, and Dew/Frost Point.
• SF6 Purity Analysis: Measures SF6 volume from 80% to 100% with high precision.
• SO2 Concentration: Includes integrated electrochemical sensors providing a specified accuracy of ? ±2% for sulfur dioxide detection.
• Versatile Gas Testing: Capable of measuring nitrogen (\(N_{2}\)) gas environments without requiring internal storage.
Advanced Features for Enhanced Field Efficiency
• Eco-Friendly Gas Recovery System: Safely pumps and stores sampled gas during testing, allowing operators to return the gas to its original compartment to prevent environmental emissions.
• User-Friendly Interface: Equipped with a full-color LCD touchscreen that monitors measuring compartment pressure and supports both automatic and manual test cycles.
• Pre-Test Tube Evacuation: Automatically evacuates the sampling tube before the initial measurement to completely eliminate ambient air contamination.
• Integrated Ice Test Verification: Features a built-in Ice Test function that manipulates sensor temperatures, allowing field technicians to quickly verify measurement accuracy on-site.
Routine Maintenance & Calibration
To maintain optimal measurement accuracy, the MBW 973-SF6 requires straightforward, routine maintenance. Operators can customize mirror heating settings to clear contaminants, but periodic manual cleaning of the measuring head—specifically the mirror—is necessary. Following proper inspection, shutdown, and storage procedures ensures long-term instrument reliability and performance in harsh industrial environments.
