Armstrong International A8581 Humidistat Refrigerant providing a direct replacement path

providing a direct replacement path for older pilot safety controls

The hardware includes a 6-foot capillary and a 3/8" x 5" copper sensing bulb

ensuring longevity under high-cycle conditions

Designed specifically for compatibility with Carrier air conditioning units and refrigeration systems

Armstrong International A8581 Humidistat Refrigerant providing a direct replacement pathThe Armstrong International A8581 Humidistat (also known as the A 8581) is a high performance on off high limit duct humidistat designed for precise safety and control in industrial and commercial HVACR applications. Engineered as a duct mounted high limit stat, this unit is specifically recommended to prevent localized saturation and downstream condensation within air handling systems. It serves as a critical safety component, typically set at 85% RH