Fits 1-1/2" hose

leading current to an internal charger which steps up the voltage from 12 to 24 volts

Rebulbing from front or back

It will also wort with HX37SAS and HX400IS intrinsicaly safe radios however the I

Crown Head

Ultra Safety Systems - Senior Ultra Pump Switches, Part No. UPS-01 24V Aqua Signal Fits 1-1/2" hoseAlarm Ready H x Dia Volts Yes 6 1 4" x 2 1 2" 24 32 These normally open pump switches operate by a magnetic reed control switch. They are self cleaning with a clog proof design. No timer delays, no electronics or mercury. They are impervious to all materials commonly found in bilges. Switch components are completely sealed against moisture. UPS 01 & UPS 02 are the same except UPS 01 series is alarm ready with an attached sensor for use with A201R