Water Level Sensor Float Switch Polyimide You can use the multimeter

You can use the multimeter to measure DC and AC voltage

The Diameter of this IR Receiver LED is 5mm

Voltage and Current Rating Max 6A at 250VAC and 10A at 125VAC Switching Mode ON-OFF Structure SPST Colour Black Contact Resistance ‚¬°¤ 20 MΩ Insulation Resistance ‚¬°¥100MΩ Number of Pins 2 Dimension (LxWxH) 20

This 30mm Heat Shrink Sleeve is ideal for insulation

Water Level Sensor Float Switch Polyimide You can use the multimeterA float switch is a device used to sense the level of liquid within a tank, it may actuate a pump, an indicator, an alarm, or other device. A float switch is a device used to sense the level of liquid within a tank. The switch may actuate a pump, an indicator, an alarm, or other device. Use them with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating, pumps, ponds,