Water Level Sensor, 4-20mA Liquid Level Sensor with Waterproof 33m Cable and 0-5m Measuring Range, Heavy Duty Stainless Steel Liquid Level Transmitter Submersible Level Sensor for Water Tank

Water Level Sensor, 4-20mA Liquid Level Sensor with Waterproof 33m Cable and 0-5m Measuring Range, Heavy Duty Stainless Steel Liquid Level Transmitter Submersible Level Sensor for Water Tank

Food Grade Optical Infrared Water Liquid Level Sensor 500mm Cable High Sensibility, Working with Liquid Level Controller(Pack of 3)

AEDIKO 4pcs DC 5V Relay Module - 1 Channel Relay Switch Board with Optocoupler Isolation, High or Low Level Trigger