About the Mars PS80-02-F1251 Low-Pressure Switch, Open on Pressure Drop at 25, Auto Resets at 65 (43347)
Order the Mars 43347 PS80-02-F1251 Pressure Switch, SPST/N0, Close on Rise and get a great solution for your system. 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 products will last you a long time, but parts will wear, and you can find replacements here when they do.
