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Series 40 มีให้เลือก 2 รุ่น (กรุณาระบุรุ่นที่ต้องการ เวลาสั่งซื้อ)
PS40-1 Pressure Switch with one set SPDT contacts 
PS40-2 Pressure Switch with two set SPDT contacts

The Potter PS40 Series Supervisory Pressure Actuated Switches are designed primarily to detect an increase and/or decrease from normal system pressure in automatic fire sprinkler systems.

Typical applications are: Dry pipe systems, pre-action air/nitrogen supervision, pressure tanks, air supplies, and water supplies.  The PS40 switch is factory set for 40PSI  (2,8 BAR) normal system pressure. The switch marked with the word LOW is set to operate at a pressure decrease of 10PSI (,7 BAR) at 30 PSI (2,1 BAR). 

Maximum System Pressure: 300 PSI (20.68 BAR) 
Pressure Connection: Nylon 1/2" NPT Male
Switch Contacts: SPDT (Form C)
10.1 Amps at 125/250VAC
2.0 Amps at 30VDC

UL/FM approved
ผลิตโดย Potter Electric Signal Company LLC