HJCONSTRHJJSOLS01 2 PCS Optical Liquid Level Sensor, ±1mm Accuracy, 5V DC, -20°C to 80°C, Humidifiers, Air-Conditioning Fans, Steam Protection

HJJSOLS01 Food Grade Liquid Detect Optical Level Sensor Infrared Water Level Sensor Liquid Level Monitor Optical Infrared Liquid Level Controller,Pack of 2

EDGELEC 120pcs Breadboard Jumper Wires 10cm 15cm 20cm 30cm 40cm 50 cm 100cm Wire Length Optional Dupont Cable Assorted Kit Male to Female Male to Male Female to Female Multicolored Ribbon Cables

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