3PCS Float Switch Side Mount Horizontal Liquid Float Switch Plastic Water Level Sensor Liquid Level Sensing Float Switch with 40cm Wire Cable for Fish Aquarium Tank Pool （Low Voltage 0~220V）

JUNMEIDO 3PCS Float Switch Side Mount Horizontal Liquid Float Switch Plastic Water Level Sensor Liquid Level Sensing Float Switch with 40cm Wire Cable for Fish Aquarium Tank Pool （Low Voltage 0~220V）

AEDIKO 4pcs Relay Module DC 12V Relay Board 1 Channel with Optocoupler Isolation Support High or Low Level Trigger