About the Mars PS80-02-F1250 Low-Pressure Switch, Open on Pressure Drop at 25, Auto Resets at 50 (43346)
Be sure to take advantage of this deal on the Mars 43346 PS80-02-F1250 Pressure Switch, SPST/N0, Close on Rise and update your system with a popular collection. 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 designs HVAC solutions that are both affordable and practical.