Pressure Switches
Tjernlund PS1503 Positive Air Flow Pressure Switch
The Tjernlund Duct Airstat senses positive pressure in a forced air heating and/or cooling system. Single pole, single throw, snap-acting switch. Typically used to activate boosting fans.
From $56.00
Greystone GFS Pressure Switches
General purpose airflow proving switch designed for HVAC applications. Used to sense positive, negative, or differential air pressure.
From $37.40
Greystone AFS Pressure Switches
General purpose airflow proving switch designed for HVAC and Energy Management applications. It may be used to sense positive, negative, or differential air pressure.
From $62.90
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