This is a Mini stainless steel float switch that contains no mercury. This float switch is designed to sense the liquid level within a tank and may activate a pump, indicator, alarm, or other device. It features a simple structure and is an easy-to-install liquid level controller. With no complex circuitry involved, it can be used in various environments as long as material selection, liquid, pressure, or temperature is appropriate. Lightweight and reliable with a straightforward working principle. The versatility of this vertically mounted sensor allows for installation at either the top or bottom of your tank, depending on whether you wish to detect rising or falling water levels. The float level switch is commonly used in electronics, electrical systems, chemical applications, water treatment, drainage, and other industries for level control and alarms. Product Name: Float Switch Material: Stainless Steel Net Weight: 123g Max. Breakdown Voltage: DC 220V Max. Switch Current: 0.5A Max. Switch Voltage: DC 100V Max Wattage: 10W Temperature Range: Low temperature 0-60 Celsius Max. Contact Resistance: 100m Ohm Thread Size: 10mm/0.4" Float Size: 28 x 28mm/1.1" x 1.1" (L x D) Wire Length: 30-40cm Total Length: 528mm/21" Package content: 1 x Water Level Sensor Note: Light and different displays may cause the color of the item in the picture to differ slightly from the actual product. The measurement allowed error is +/- 1-3cm.