Sump Alarm SA-2368-10 "Sludge Boss" Heavy Duty Float Switch 33ft Wire LeadSump Alarm "Sludge Boss" Heavy Duty Float Switch for Suspended Solids The SludgeBoss Heavy Duty Float Switch for use with sewage, suspended solids and viscous liquids. The SludgeBoss is the float switch for extra nasty locations where there is sewage and suspended solids. This heavy duty float switch has an integrated concrete counterweight ensuring its orientation even if held below floating materials. Self Orienting, No Tether or Cable Weight