The Air Sentry Breathers replace the standard breather or vent cap on virtually all types of industrial equipment， storage tanks， and transformers. They prevent destructive contaminants from entering fluid reservoirs and tanks as air is breathed in and out due to thermal expansion or fluid level changes. Fluid contamination is one of the primary causes of wear and lubricant failure in industrial equipment.

The Mini Breather is designed for applications where space is limited. It is often used for gearboxes and small reservoirs. The airflow rating for this model is 10 cfm (75 GPM). The connection is a 1/2" female thread which mates with several available fittings.