Potter Pressure Switch

The PS120 series pressure type supervisory pressure switches shall be installed on system piping as designated on the drawing and/or as specified herein. Switched shall be provided with 1/2” NPT male pressure connection and to detect an increase and/or decrease from normal system pressure in automatic fire sprinkle system. Typical applications are: Wet pipe system with excess pressure, pressure tanks, air supplier and water supplier. The PS120 series pressure switches are factory set for use in a normal 120psi system. The PS120-1 is factory set to respond at 110psi at decreasing pressure and DPS120-2 is factory set to respond at 130psi at increasing pressure and 110psi at decreasing pressure.

• Maximum System Pressure:  300PSI (2.07MPa)

• Factory Setting:       PS120-1 operates at decreasing pressure at 110psi

                                   PS120-2 operates at increasing pressure at 130psi

                                                    and at decreasing pressure at 110psi

• Differential:             Approximately 3psi@25psi, 8psi@175psi

• Maximum Adjustment Pressure Range:             25 to 175psi

• Contact Ratings:                   PS120-1: One set SPDT (Form C)

                      PS120-2: Two sets of SPDT (Form C)

                      10.1Amps at 125/250 VAC

                      2.0Amps at 24 VDC

• Operating Temperature Range: -40º F to 160ºF (-40ºC to 71ºC)

• Enclosure Rating:                 NEMA 4- suitable for indoor/outdoor use

• Warranty:                            5 Years