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.
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This part is compatible to the original part number. Part numbers are always leading.
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