Potter Amseco PS120-2 Supervisory Pressure Switch for Excess Pressure Systems, Two Contacts

  • JMAC SKU: POTTER-AMSECO-PS120-2
$190.20
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The Potter Amseco PS120-2 is a supervisory pressure switch with two sets of SPDT contacts designed primarily to detect an increase and/or decrease from normal system pressure in automatic fire sprinkler systems.

The PS120-2 is designed for wet pipe systems with excess pressure, pressure tanks, air supplies, and water supplies.

UPC: 785192013983
Also known as: PL-PS1202, PS1202

Technical Specifications:
  • Dimensions: 3.78" (9.6cm) W x 3.20" (8.1cm) D x 4.22" (10.7cm) H
  • Pressure Connection: Nylon 1/2" NPT male
  • Pressure Range: 25-175 PSI (1.7 - 12.1 BAR)
  • Differential: Typical 2 lbs. at 25 PSI (0.14 at 1.7 BAR), 8 lbs at 175 PSI (55 at 12.1 BAR)
  • Maximum System Pressure: 300 PSI (20.68 BAR)
  • Factory Adjustment: operates in increase at 130 PSI (9 BAR) and on decrease at 110 PSI (7.6 BAR)
  • Switch Contacts: Two SPDT Form C 10.1 Amps at 125/250VAC, 2.0 Amps at 30VDC


For more information about the Potter / Amseco PS120-2, please contact us.
  • Two sets of SPDT contacts
  • NEMA 4 solid metal enclosure
  • Factory installed neoprene gasket
  • 300 psi system pressure rated
  • Pressure range 25-175 psi
  • male NPT fitting
  • Two knockouts for dual voltage applications
  • Separate isolated wiring chambers eliminate NEC questions regarding multi-voltage applications
  • Factory set for operation at pressure increase at 130 psi, pressure decrease at 110 psi
  • 5-year warranty
  • Listings: UL, ULC, CSFM, FM, LPC, NYMEA, and CE
  • Typically used on excess pressure systems


2 Reviews

  • 5
    POTTER-AMSECO-PS120-2

    Posted by 141854 on May 16th 2019

  • 5
    POTTER-AMSECO-PS120-2

    Posted by 63955 on Dec 14th 2013