Ferro liquid clock and the working behind it

Ferro liquid watch better known to be ferrolic watch is a boon of science and technology. It is a scientific clock available in the different forms and it is at its top of a beautiful creation of art by the design of science. A thin layer of ferro liquid is placed behind a glass panel and behind that liquid are the numerous magnets that make the liquid to take digital numbers form. It looks very advanced but the principle of it is very simple. Before entering this lets first discuss about the ferro fluid.
          This ferro fluid was first time introduced by Steve papell who was then NASA researcher. This is the fluid of the rocket fuel and he first time noticed that the fluid was easily drawn out in the presence of magnetic field. Since then it get this name of ferro fluid. This ferro fluid is made up of very tiny ferro magnetic and ferric magnetic substances that are of the nano scale and that are present in the water as the freely suspended residue. It is a very big clumps available in the first but after that different filtration is undergone to make it a very small nano size particle. All the intermolecular force of attraction between the molecules of the magnet to attract opposite charge cannot overcome vander wall force of attraction as a result they need another magnetic field for the free moment of the molecules.
     In other sense the ferro liquid used in the clock us always perpetual since it is operated by the magnetic field to the ferro liquid. On behalf of this thing today this clock is gaining more and more popularity by the time. Since it is a good fusion of science and art thus it is very attractive and eye-catching. This clock needs no any other source of energy to move but simply a magnetic field. It can be damaged if it is brought near to a high magnetic field source.
      Due to this high popularity and a unique concept the price of this watch is slight high. It is available in $8500 around the USA, Russia, and many other countries. The clock tick tock of the digital number changes its form in each seconds. It has very less disadvantages due to this it is gaining popularity very much. The liquid is expensive due to this reason the clock is also expensive. This is the working of the ferrolic clock and the special liquid behind its construction.