Sight Glasses

Sight glasses are essential diagnostic components in refrigeration and air conditioning systems. Installed in the liquid line, these transparent indicators allow technicians and operators to visually monitor refrigerant condition, moisture presence, and system flow. A clear, unobstructed sight glass confirms proper refrigerant charge and flow, while color-coded moisture indicators help detect contamination or the need for system servicing.

At Finstar Industrial Systems Ltd, we supply high-quality refrigeration sight glasses in various sizes and connection types (flare and solder). Our models are compatible with common refrigerants including R134a, R404a, R410a, and R32. Each unit features a durable brass or stainless steel body with a robust inspection window and moisture indicator for accurate system monitoring.

Applications of Sight Glasses

Refrigeration Systems in Cold Rooms
In cold room installations, sight glasses are vital for ensuring proper refrigerant charging. They help identify moisture levels and flow irregularities that may affect system efficiency or damage components.
Display Fridges and Freezer Units
Commercial coolers and display freezers benefit from these glasses during regular service. These units allow quick checks for refrigerant condition and provide early warning for leaks or restrictions in the system.
Chillers and Packaged Systems
In chiller systems, sight glasses enable operators to verify refrigerant flow and dryness before startup and during operation. This reduces the risk of system underperformance or moisture-related failures.
Air Conditioning Systems
The glasses are commonly used in larger HVAC systems to monitor refrigerant flow into the expansion valve. They assist service technicians in diagnosing charging problems and detecting moisture buildup.
Refrigerant Recovery and Charging Stations
During refrigerant recovery or system charging, sight glasses provide real-time confirmation of refrigerant purity and flow condition. This ensures accurate system setup and maintenance.

Why Choose Finstar Industrial Systems Ltd?

Finstar Industrial Systems Ltd supplies durable and accurate glasses for all types of refrigeration and HVAC systems. Our units are designed to withstand high pressure and corrosive conditions, providing long-term reliability in critical system monitoring. Whether you’re installing a new system or performing routine diagnostics, our sight glasses help you keep your equipment performing at its best.