Protect your refrigeration and HVAC equipment from moisture buildup with the Castel Ø 18 mm Humidity Indicator. When moisture enters the system, the indicator shifts from blue to pink/red, providing an immediate visual alert for timely maintenance.
Instant Color Change: Clear visual alert when moisture is detected.
Ø 18 mm Standard Thread: Fits seamlessly into standard refrigerant lines.
Durable Brass Body: Corrosion-resistant construction for longevity.
Model Fit: Compatible with Castel 3940/M18 & 3740/M18.
Rely on Castel’s precision-engineered humidity indicators to streamline maintenance and extend equipment life—order yours today.
Looking for similar items or different specifications for this Castel Humidity Indicator Ø 18 mm (Models 3940/M18 & 3740/M18)?
Explore our full range in the Horeca, Refrigeration Fittings categories
*
This part is compatible to the original part number. Part numbers are always leading.
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...
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...
Keep your refrigeration and HVAC systems performing at their best with the Castel Ø 3/8″ Humidity Indicator (3940/3). This inline device offers fast, reliable moisture detection by changing color from blue to pink/red, giving you immediate insight into system health.
Instant Color Alerts: See moisture ingress via a clear color...
Simplify mixed-thread installations in your HVAC and refrigeration systems with the Castel reducing nut, featuring a 3/8″ SAE male thread and a Ø 6 mm (1/4″) female thread. Precision-machined from high-grade brass and finished for superior corrosion resistance, this component provides a secure, leak-proof connection under demanding conditions....
Protect your refrigeration and air-conditioning circuits from moisture damage with the Castel Humidity Indicator. Its brass housing and built-in color-change sight glass provide clear, real-time feedback on humidity levels in Ø ¼″ (6 mm) cooling lines.
Features & Benefits
Instant Moisture Alerts: Color-change sight glass instantly shows...
This 5/8" SAE nut for ø 14 mm copper pipe is designed for secure and robust connections in refrigeration and air conditioning systems. Engineered for high reliability, it is compatible with Castel and Olab reference codes and is suitable for use with a wide range of refrigerants as specified by ASHRAE 34:2019.
Features
SAE flare: 5/8"
Copper pipe...
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...
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...