This is a mini stainless steel flow switch,contains no for mercury. Light weight and simple operating principle,high reliability. This move replace is a tool used to sense the extent of liquid inside a tank, the change may well activate a pump,an indicator,an alarm,or different device. This go with the flow switch is a simple structure,easy set up liquid level controller. It would not have a posh circuit,will no longer be disturbed,as long as the materials selection, liquid,pressure or temperture can be used in any environment. The versatility of this vertically monted sensor means that it may be installed both on the peak or base of your tank,depending on whether or not you for wish to locate the water's upward push or fall. The go with the flow level change is widely used in electronic,electrical,chemical,water treatment, drainage and assorted walks of life level management and alarm Specification: Material: Stainless Steel Color: Silver Size: 28*28*9 Quantity: 1 Pcs Note: Please enable 1-3mm error thanks to guide measurement. pls ensure you do not intellect before you bid Due to the difference between different monitors, the image might not replicate the actual coloration of the item. Thank you! Package Contents: 1x Floating Switch