PROSTORMER 1HP Submersible Electric Sewage Pump, Clean Utility Pump/Dirty Pump 3700GPH with Auto Float Switch for Pool Drain, Hot Tub, Flood Drain, Pool Sewage Pump - Walmart.com
Item # SPEx-1, Sump and Sewage Pump Exerciser® Controllers for Piggy-Back Float Operated Pumps On Motor Protection Electronics (MPE)
Electronic Sump Pump Switch | Most Reliable Sensor - WLC
SumpWatcher Electronic Sump Pump Switch
HydroCheck Electronic Sewage Pump Switch with Programmable Cycle Length and Built-in Alarms (HC5000T), Made in the USA - Sump Pump Accessories - Amazon.com