Float switch: purpose, description

The float switch for electropumps is the cheapest and easiest method of protection against the “dry run” of pumping equipment. Such a switch is also called a float.

Today there is a huge setdifferent methods of pump control, but the most popular, due to its simplicity, is a float switch. The main advantage of such a device is that the floats can be simultaneously used as a water level sensor and as an actuator for pump control.

The float switch is installed intanks, storage tanks, tanks, wells, it is designed to control industrial and domestic pumps for water supply, drainage and sewage. In one tank several such floats can be installed, and each will perform its function: control of the main pump, auxiliary unit, as an emergency sensor of the overflow sensor. The use of such devices in these systems provides

reliable protection of pumping equipment firstturn from work in the prohibited mode of "dry running". Also when filling various containers switches provide protection from overflows. The float switch can be of two types: light (IGD2 / S, IGD5 / S, IGD10 / S) and heavy (MAC / 3, MAC / 5-5S). Mostly light devices are used in drainage systems and water supply, and heavy - for sewage, drainage, rainwater, etc.

Конструктивно поплавковый выключатель It is a sealed floating plastic box with a steel ball and an electrical switch inside. When you change the position of the float ball closes or opens the contacts of the switch. Float switch goes on sale with a length of wire from two to ten meters, depending on the type of device. Moisture resistant cable has three wires. Most often they have the following colors: blue and brown (from normally closed and open contacts), as well as black (common). The cable outlet is sealed with a mechanical seal, it is equipped with a reliable mechanism for relieving mechanical stress in the wire. The insulated cable entry cavity is filled with polymer resins that prevent the ingress of moisture. Float switch due to heat resistance and chemical properties of the housing, as well as cable sheath,

consisting of thermoplastic rubber, possesseshigh resistance to fecal water, uric acid, alcohols, gasoline, liquid oils, fruit acid, etc. The plastic surface of the case has no pores, this eliminates the likelihood of various contaminants sticking to it, and paper, sand and other solid elements slide off from it and thus do not affect the buoyancy of the device.

How much is the float switch?The price of such a device is quite low. The simplest switches will cost about 300-400 rubles. However, prices for some models can reach several thousand rubles.