Auburn H4-12-12PK Gauge Glass Refrigerant Precise Thermal Response: Uses a

Precise Thermal Response: Uses a direct acting mechanism that opens on temperature rise

ensuring the valve returns to its original position during a power loss

eliminating common field-wiring workarounds

Always verify the required orifice quantity and drill size in your heater's manual

Auburn H4-12-12PK Gauge Glass Refrigerant Precise Thermal Response: Uses aThe Auburn H4 12 12PK Gauge Glass is a high performance borosilicate glass solution designed for critical fluid monitoring in industrial boilers and steam engines. This heavy duty sight glass features a 5 8" outer diameter (OD) and a 12 inch length, providing exceptional thermal shock resistance and durability under high pressure conditions. Each 12 pack contains high clarity tubes equipped with a distinct red line indicator, which uses optical