About the Mars PS80-02-F1274 Low-Pressure Switch, Open on Pressure Drop at 5, Auto Resets at 30 (43342)
Get a great deal on the Mars 43342 PS80-02-F1274 Pressure Switch, SPDT/N0, Close on Rise while it's still in stock online at PlumbersStock. Pressure switches make contact on pressure rise/fall, which enables its switching operation. A pressure switch senses negative pressure in a furnace and shuts it down as a safety measure against harmful fumes and gas leaks.
As the manufacturer describes it, MARS Pressure Switches deliver the reliability and performance that makes them the most trusted electromechanical sensor. The MARS line of pressure switches cover many new R410A applications along with traditional pressure setting switches. It's easy to replace. Mars has made a name for itself by manufacturing reliable heating and cooling products.
