modular contactors are a group of devices actuators which allow for economical and safe control of the current flow in electrical installations they are used among others in control systems for heating lighting ventilation and electric motor power supply systems.
what is float switch
float switch is a type of level sensor a device used to detect the level of liquid within a tank. The switch may be used to control a pump as an indicator an alarm or to control other devices one type of float switch uses a mercury switch inside a hinged float.

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