Water Level Relay

Float less Electric Water Liquid Level Relay PM61F GR 110V/220V With Socket
US $28.45
AC 220V 8 Pin Liquid Water Level Controller Floatless Sensor Relay w Socket
US $22.97
water level relay water level controller 220VAC 61F GP N8
US $50.00
EV3 BESFUL water level controller, water level relay switch
US $29.62