Product details
Moisture Liquid Indicator 1.1/8″ Copper Braze 3940/9 Castel
The Castel 3940/9 moisture liquid indicator is engineered for accurate visual monitoring of refrigerant flow and moisture content in HVAC and refrigeration systems. Installed in the liquid line, it allows technicians to quickly check system condition during operation. The 1.1/8″ copper braze connections provide secure installation and long-term durability in commercial refrigeration applications.
Key Benefits
Monitors refrigerant flow condition
Detects moisture presence in the system
1.1/8″ copper braze connections for secure installation
Clear visual indicator for easy inspection
Suitable for commercial refrigeration and HVAC systems
Specifications
Brand: Castel
Model: 3940/9
Product Type: Moisture Liquid Indicator
Connection Type: Copper Braze
Connection Size: 1.1/8″
Application: Refrigeration and air-conditioning systems
Installation: Liquid line mounting
Applications
Commercial refrigeration systems
Air-conditioning liquid line monitoring
Cold storage installations
HVAC system maintenance and diagnostics
FAQs
What is a moisture liquid indicator used for:
It is used to visually monitor refrigerant condition and detect moisture in refrigeration systems.
What connection type does this model use:
It uses 1.1/8″ copper braze connections.
Where is this indicator installed:
It is installed in the liquid line of refrigeration and HVAC systems.
Why is moisture detection important:
Moisture can cause system damage, corrosion, and reduced performance, so early detection helps protect the system.






