Feuchtigkeits-/Flüssigkeitsanzeige D.16 3940 / 5 De Dietrich 7778577

The Indicator humidity/liquid D.16 3940/5 provides a clear visual check for the presence of moisture or liquid in your system. This sight glass is typically installed on filters or separators to monitor fluid levels or detect water contamination. For boiler and burner maintenance, this indicator helps operators quickly assess system condition, preventing issues related to unwanted liquids. Its durable design ensures long-lasting visibility.