Emerson Alco 065391 Moisture Indicator

The Emerson Alco 065391 (Model HMI-1MM2) is a high-sensitivity hermetic moisture indicator designed for a wide range of cooling applications. This 1/4" male flare sight glass features a rugged, all-brass corrosion-resistant body and solid copper connections to ensure a leak-free installation in the liquid line. Engineered with a 680 PSI maximum working pressure, it is compatible with CFC, HCFC, and HFC refrigerants, making it a versatile choice for technicians working with varied system architectures. The fused glass eyepiece provides a wide-angle view, allowing for immediate visual detection of flash gas or bubbles, which often indicates an insufficient refrigerant charge or a restriction in the liquid line. Its unique high-accuracy moisture indicator element offers superior color calibration at low ppm levels, helping contractors identify moisture contamination before acid formation leads to compressor failure. This HLI series moisture indicator is a critical diagnostic component for maintaining industrial refrigeration reliability and preventing long-term system degradation.

Key Benefits:

• Broad Compatibility: Fully optimized for CFC, HCFC, and HFC refrigerants, reducing the need for multiple inventory variants.
• Hermetic Integrity: Features leak-free construction and a robust 680 psig rating to withstand high-pressure environments.
• Precision Calibration: High-visibility chemical element provides accurate color transition even at elevated temperatures and low moisture concentrations.
• Enhanced Diagnostics: The transparent window allows for real-time flow observation to identify circulation problems or undercharged systems.
• Durable Infrastructure: Constructed with solid copper connections and corrosion-resistant brass for long-term field durability.

Common Questions:

What do the different colors on the indicator signify?
The indicator element changes color based on the moisture concentration in the refrigerant. Typically, green indicates a "dry" system, while a shift toward yellow warns of moisture contamination, signaling that a filter-drier replacement is necessary.

Can the HMI-1MM2 be installed in any orientation?
Yes, this 1/4" flare moisture indicator can be installed in any position within the liquid line, provided the technician ensures clear visibility of the sight glass for monitoring.

Is this moisture indicator suitable for high-pressure systems?
With a 680 PSI max working pressure, the 065391 is suitable for most standard HFC and HCFC systems, though always verify your specific system peak pressures against the technical ratings.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.