The float switch is a device used for liquid level detection and control, playing an important role in many industrial and civilian fields. Taking the electric float switch of model YXF - A mentioned on the webpage as an example, we can have an in-depth understanding of the characteristics and functions of the float switch.
I. Basic Structure and Material
Overall Structure
The float switch mainly consists of a float ball, a switch assembly, and a connecting cable. The float ball is usually made of a specific material and can float in the liquid. In this model, the material of the float switch is pp (polypropylene), which has good chemical stability, corrosion resistance, and a certain mechanical strength, suitable for a variety of liquid environments.
Connecting Cable
The cable is an important part that connects the float switch to the external control system. The cable length of this float switch has multiple options. The standard supply length is 4 meters, and different lengths such as 1 meter, 3 meters, 5 meters, and 10 meters can also be customized according to customer requirements. The cable conductor is designed with an overstriking of 0.7 inches to ensure good conductivity and stable transmission of electrical signals. The quality of the cable is crucial for the normal operation of the float switch. It needs to have certain corrosion resistance and insulation performance to adapt to different working environments.
II. Working Parameters
Electrical Parameters
1.The working voltage of this float switch is 12V, and the working current is 10A. These parameters determine the electrical conditions under which the float switch can work normally. In practical applications, it is necessary to ensure that the connected power supply system can provide the required voltage and current to ensure the stable operation of the float switch. At the same time, except in special cases, it is recommended to use a power supply lower than AC, DC 50V, which helps to extend the service life of the float switch and improve its safety.
2.The product has also passed the CE certification, indicating that the float switch complies with European standards in terms of electromagnetic compatibility and electrical safety and can be used safely in the EU market and other regions that recognize the CE certification.
Environmental Parameters
1.The working temperature range is from - 10°C to 70°C, and the maximum temperature tolerance is 80°C. This means that the float switch can work normally within a certain temperature range and adapt to temperature changes in different seasons and environmental conditions. In a low-temperature environment, the materials and internal components of the float switch can still maintain good performance and will not become brittle or fail due to the cold; in a high-temperature environment, it can also operate stably within the specified upper temperature limit to ensure the accuracy of liquid level detection and control.
2.The working pressure is 1Mpa, and the maximum pressure is also 1Mpa. This enables the float switch to work in a liquid environment with a certain pressure and is suitable for liquid level control in some systems with a certain pressure, such as small water supply systems and sewage discharge systems.
The applicable media include branch water, sewage, oils, and acid-base liquids with a concentration lower than medium. This shows that the float switch has a wide range of applicability and can detect liquid level changes in different liquid environments. Whether in a clean water environment or a liquid containing certain impurities or chemicals, it can play its role.
III. Working Principle and Contact State
Working Principle
The float switch works based on the principle of buoyancy. When the liquid level rises, the float ball will rise with the liquid level. When the float ball rises to a certain position, it will touch the relevant elements in the switch assembly, causing the switch to act and change the on-off state of the circuit. Conversely, when the liquid level drops, the float ball will also drop. When it drops to a specific position, it will trigger another state change of the switch.
Contact State
1.In the natural pendulous state, the float switch has a specific contact state. The black wire is the normally open end, the red wire is the normally closed end, and the blue wire is the normally open end. This means that under normal circumstances, when the liquid level is at a lower position, the circuits connected to the black wire and the blue wire are open, and the circuit connected to the red wire is closed. When the liquid level rises to the height that triggers the float ball action, the circuits connected to the black wire and the blue wire will close, and the circuit connected to the red wire will open. This design of the contact state makes it convenient for the float switch to be connected to the external control circuit to realize the control of the liquid level, such as controlling the start and stop of the water pump. When the liquid level is lower than the set value, the water pump is started to pump water, and when the liquid level is higher than the set value, the water pump stops running.
2.With its simple and reliable structure, clear working parameters, and flexible contact state, the float switch has become a commonly used device in the field of liquid level detection and control, widely used in various systems that require liquid level management, providing an important guarantee for the normal operation of industrial production and civilian facilities.
