Tips for Using a Float Switch
Posted by juliamarks82 on May 4th, 2011
The levels of water or fluids in a receptacle may be required to be monitored and controlled for a host of various reasons. It might be significant to get a warning when a container is getting low on water or fluid or high on water or fluid so that suitable action may be taken. One example of such a situation is that of a submersible water pump. If it is permitted to run dry, then it will just burn out fast; hence it is important to use some kind of device to prevent this from happening. A float switch or water level sensors are the answer to this problem.
In the past, mercury tilt switches would be often used but since mercury is high in toxicity they are not desirable any more. The contemporary float switch is today mostly made from a reed switch which is triggered by a magnet that is float-mounted. There are even more complicated float switches available today and they make use of a series of conductance or optical sensors.
The float switch or water level sensors basically carry out the function of detecting the level of water or liquid in a receptacle. When a predetermined maximum or minimum level is attained, the float switch will get activated and will trigger the required response like turning off the pump on or off or triggering an alarm.
Water level sensors or float switch are used not only in the industry but also in homes. A home that is environmentally friendly might make use of a rainwater toilet and the chances are that it will be controlled by a device of this kind. The cistern in the toilet will be required to be filled from the chief reservoir of rainwater. When the cistern is not adequately full, the switch can be adjusted to activate a pump so as to fill it up as an alternative switching off the pump once the cistern is full again thus preventing the water from overflowing into the bathroom.
Many a time when the liquid under measurement is turbulent, then the float switch may be triggered a lot. This is called multi-switching and may be undesirable as it can cause damage to the pump with the switching repeating over and over in a short period of time. In such cases, the device can be adjusted to stay off for a particular period of time or it could be activated only when the liquid is detected on a continuous basis for a predetermined period of time. The float switch or water level sensors are simple devices but they can be very useful in our day to day life. There is quite a good choice available in the market today and now with the Internet technology you can even shop online from the comfort of your home and get some really good deals.
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