Sporlan 700078 SA-13 3/8 SAE Sight Glass

The Sporlan 700078 SA-13 See-All Sight Glass is a critical diagnostic component for commercial refrigeration and air conditioning systems, featuring 3/8 SAE Male Flare connections for secure integration into the liquid line. As a veteran technician knows, the "See-All" design provides a dual-function monitoring solution, allowing for the immediate visual detection of refrigerant flash gas and precise moisture level analysis. This model is engineered with a high-sensitivity moisture indicator paper that is accurately calibrated to reflect moisture concentrations in parts per million (PPM) for a wide range of refrigerants, including R-410A, R-404A, R-407C, R-134a, and R-22. The indicator element is notably reversible and protected by a filter pad and screen to prevent discoloration from system debris or oil turbulence. Constructed with a robust fused glass-to-metal seal and a heavily copper-plated steel body, the SA-13 moisture indicator handles maximum working pressures up to 650 PSI, ensuring long-term reliability in high-pressure ASHRAE applications without the risk of leaks.

Key Benefits

• Multi-Refrigerant Compatibility: Single indicator provides accurate readings for R-410A, R-134a, R-404A, R-407C, R-507, and R-22, eliminating the need for refrigerant-specific sight glasses.
• Liquid Line Diagnostics: The large, crystal-clear sight glass allows technicians to verify a solid column of liquid at the expansion valve, identifying refrigerant shortages or liquid line restrictions.
• Field-Replaceable Element: The internal color indicator paper can be serviced on fused glass models, allowing for maintenance without removing the SA-13 3/8 SAE body from the piping.
• Simplified Color Interpretation: Deep green indicates a dry system, while bright yellow signals a wet condition, providing clear, reversible feedback on filter-drier performance.
• Durable Construction: Features a fused glass-to-metal joint for a permanent leak-free seal and includes a plastic cap to protect the glass from grease and job-site grit.

Common Questions

Where is the best location to install the SA-13 sight glass?
For the most accurate assessment of the refrigerant state entering the metering device, install the Sporlan SA-13 as close to the thermostatic expansion valve (TEV) as possible. This ensures any bubbles seen represent actual flash gas at the valve inlet.

Does the color change immediately upon system startup?
The moisture indicator responds to the relative saturation of the refrigerant. While the color change is highly reliable, it may take several hours of operation for the indicator to stabilize and reflect the true moisture content after a filter-drier change or system opening.

Can the SA-13 be used with POE and PVE oils?
Yes, the Sporlan 700078 is designed to work with all standard synthetic and mineral oils. The protective filter pad around the indicator element prevents oil-borne contaminants from staining the moisture indicator paper.

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.