Sporlan 700130 SA-13S Moisture Indicator

Professional grade moisture monitoring for high-pressure refrigeration systems relies on the Sporlan 700130 SA-13S. This 3/8" ODF moisture indicator, often referred to as the See-All sight glass, features dual-function capabilities that allow technicians to simultaneously monitor refrigerant liquid levels and detect presence of moisture. The unit utilizes a highly sensitive moisture indicator element made of porous filter paper impregnated with chemical salts. A deep green color signifies a dry system, while a bright yellow warns of wet conditions that could lead to compressor damage or acid formation. Engineered for high-pressure refrigeration systems, it has a maximum operating pressure of 650 psi (44.8 bar) and is compatible with modern refrigerants, including R-134a, R-22, R-404A, R-407C, R-410A, and R-507. The ODF solder connection and extended steel fittings facilitate rapid installation without the need for disassembly, protecting the crystal-clear glass disc from excessive heat during the brazing process.

• Universal Compatibility: One indicator element is precisely calibrated for multiple common refrigerants, eliminating the need for separate components for different gas types.
• Enhanced Visibility: Features an extra-large sight glass for easy identification of bubbles, indicating refrigerant shortage or liquid line restrictions.
• Replaceable Element: Maintenance is simplified with a replaceable indicator element (kit K-SA-4) that can be swapped through the bottom of the unit without removing the assembly from the line.
• Contamination Protection: A built-in filter pad and screen protect the sensitive paper from system dirt and turbulence, ensuring accurate readings over the lifespan of the system.
• Robust Construction: The polyester-coated steel body offers superior corrosion resistance, rated for up to 500 hours of salt spray protection.

What do the color changes signify on the Sporlan SA-13S?
The internal paper changes from dark green (dry) to bright yellow (wet). These color changes are fully reversible, reflecting real-time moisture fluctuations within the refrigerant piping.

Does the SA-13S need to be disassembled before brazing?
No. The extended fittings on this 3/8" ODF model conduct only minimal heat, allowing for direct installation. However, wrapping the body with a damp cloth or using a thermal heat sink during brazing is still recommended as a best practice.

How are bubbles in the sight glass interpreted?
A consistent stream of bubbles usually indicates a low refrigerant charge or a restriction in the liquid line upstream of the indicator, such as a clogged filter-drier.

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.