PrintMunro Pressure Sensor and Boot Monitors system pressure. 24 volt incoming power makes it suitable for outdoor use. Features and Benefits: Normally closed Fixed set point 1/4” NPT male Nema: 4, 13 Diff. range: 8 – 16% Factory setting: 20 PSI Specs/Part #s Factory Setting Description Mounting Model Number 20# Pressure sensor and boot 1/4" MNPT ELSWITCH7 Note: Boot provides protection for electrical wire connections