Ensure the health and efficiency of your refrigeration and HVAC equipment with the Castel Ø 12 mm Humidity Indicator. When moisture enters the system, the indicator shifts from blue to pink/red, giving you an immediate, easy-to-read alert.
Instant Color Alerts: Clear visual change for fast moisture detection.
Ø 12 mm Standard Thread: Seamless integration into refrigerant lines.
Rugged Brass Body: Corrosion-resistant materials for reliable durability.
Models 3940/M12 & 3740/M12: Designed for compatibility and low-maintenance operation.
Rely on Castel’s precision-engineered humidity indicators to simplify maintenance, prevent moisture damage, and extend equipment life—order yours today.
Looking for similar items or different specifications for this Castel Humidity Indicator Ø 12 mm (Models 3940/M12 & 3740/M12)?
Explore our full range in the Horeca, Refrigeration Fittings categories
*
This part is compatible to the original part number. Part numbers are always leading.
This 3/4" SAE nut for ø 18 mm copper pipe is designed for robust, leak-resistant connections in refrigeration and air conditioning systems. Compatible with reference codes from Castel and Olab, it is ideal for professional installations using a wide range of ASHRAE 34:2019 approved refrigerants.
Features
SAE flare: 3/4"
Copper pipe diameter: 18 mm...
The T-fitting 1/4" SAE is ideal for creating secure branch connections in refrigeration and HVAC systems. Designed for easy installation and a leak-free seal, this fitting is compatible with Refco 9884811 for commercial and industrial use.
Features
Connection: 1/4" SAE – 1/4" SAE – 1/4" SAE
Reliable, leak-proof construction
Simple installation...
The T2-4 tee fitting 1/4" SAE MMM is designed for easy branching in refrigeration and HVAC systems. This durable, leak-free fitting is compatible with Castel, Olab, and Refco references, making it a reliable solution for commercial and industrial use.
Features
Model: T2-4
Connection: 1/4" SAE MMM
Durable, leak-proof construction
Fast...
Simplify charging, evacuation, and pressure testing on refrigeration and HVAC lines with this ¼″ SAE × ⅛″ NPT access valve. Machined from high-quality brass and plated for corrosion resistance, it installs inline for a low-profile fit and provides smooth, precise flow control.
Dual-Thread Design: ¼″ SAE male inlet to ⅛″ NPT female...
Maintain leak-free connections in your refrigeration and HVAC systems with the Castel 1/2″ SAE Nut, featuring a precise Ø 3/8″ internal thread. Crafted from high-quality brass with a corrosion-resistant finish, this nut provides durable, reliable performance under demanding conditions.
Precision Engineering: Guarantees a secure,...
Ensure leak-free performance in your refrigeration and HVAC systems with the Castel 1/2″ SAE Nut, featuring a precise Ø 10 mm internal thread. Manufactured from premium brass and finished for corrosion resistance, this nut delivers a secure seal under demanding conditions.
Precision Machining: Guarantees a tight, leak-proof...
Prevent moisture damage in your HVAC and refrigeration systems with the Danfoss Humidity Indicator SGN10-014-0172. This inline device features a 3/8″ female SAE connection and a vivid color-changing element that goes from blue to pink at the first trace of moisture, enabling quick visual checks and preventive maintenance.
3/8″ FM...
Achieve hassle-free hose and tube routing in your refrigeration and HVAC systems with the Castel Double Swivel Sleeve US4-6 3/8″ SAE. Featuring two independent swivel ends, this coupling lets you align connections without twisting or stressing lines—ideal for tight or awkward installations.
Dual Swivel Ends: Independent 3/8″ SAE...