1. 0-220V Float Sensor Switch Side Mount Liquid Water Level Sensor Controller Automatic Water Pump Switch Aquarium Tank Pool. 2. A 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. 3. Use them with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating, or what ever your project may be. 4. The float liquid level switch is a liquid level control device with simple structure and convenient use. It does not need to provide power supply, has no complicated circuit, and has the advantages of smaller volume and longer working life than general mechanical switches. 5. As long as the material is correctly, and any liquid or pressure can be used, it can be used in the shipbuilding industry, generator equipment, petrochemical industry, food industry, water treatment equipment, dyeing and finishing industry, hydraulic machinery, etc. application. Notice:The float should be used with the relay. It cannot be connected directly to the power supply. Otherwise, the float may be short-circuited and burned out. Carry current (Max): 1A Lead cable length:350mm Contract rating (Max): 10W Switching current (Max): 0.5A Switching voltage (Max): 110VDC Breakdown voltage (Max): 220VDC Contract resistance (Max): 100 OHM Temperature rating: -10 - +60 Celsius degree Note: Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color: As Shown Material: plastic Package Contents: 2 x Liquid float switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.