The Castel 3940/3 moisture indicator is engineered to give a dependable visual indication of moisture levels in refrigeration and air conditioning systems. Featuring a 3/8″ copper braze connection, it integrates directly into compatible refrigerant lines and provides a clear viewing window that signals moisture conditions. With durable construction designed for professional use, this indicator is ideal for installation, inspection, and routine maintenance in commercial and industrial cooling environments where early moisture detection helps prevent issues and extend system life.

Key Benefits

Provides clear visual indication of moisture contamination
Helps detect moisture early to protect system components
Supports accurate diagnostics and maintenance
Durable construction for dependable long-term performance
Improves reliability and efficiency of refrigeration systems

Specifications

Product Type: Moisture Indicator
Model: 3940/3
Connection Size: 3/8″ Copper Braze
Category: Refrigeration Valves & Accessories
Sub-Category: Sight Glasses & Moisture Indicators
Application: Refrigeration and air conditioning systems
Function: Visual monitoring of moisture condition
Brand: Castel

Applications

Moisture detection in refrigeration systems
Refrigerant line inspection and diagnostics
Commercial and industrial cooling system maintenance
Professional HVAC and refrigeration servicing

FAQs

What is the purpose of the 3940/3 moisture indicator?
It visually shows moisture levels in the refrigeration or air conditioning system to help identify contamination.

What connection type does this indicator use?
It uses a 3/8″ copper braze connection for secure line integration.

Why is moisture detection important in cooling systems?
Moisture can lead to corrosion, freezing, and reduced performance, so early detection helps prevent issues.

Is this indicator suitable for commercial refrigeration systems?
Yes, it’s designed for commercial and industrial HVAC and refrigeration applications.

Does this indicator support maintenance operations?
Yes, its clear viewing window helps technicians monitor system condition accurately.