Float Switch Water Level Control Sensor with 10' Cable ALLOWS ELECTRICAL EQUIPMENT TO START AND STOP AUTOMATICALLY (USUALLY PUMPS, BUT ALSO ELECTRIC CONTROL VALVES, ALARMS, ETC) HIGH RELIABILITY. EASY INSTALLATION. PERFECT AND INFALLIBLE FOR SEWAGE WATER PUMP CONTROL AND ANY KIND OF PUMPING SYSTEM. You can install it as you need: Normally closed or normally open, whichever fits your needs. INCLUDES 10 FEET CABLE , COUNTERWEIGHT AND INSTRUCTIONS. READY TO INSTALL.