A weighing scale (usually just “scale” in common usage; except in Australian English where “scales” is more common) is a measuring instrument for measuring the weight or mass of an object. They use one of two techniques. A spring scale measures weight by the distance a spring deflects under its load. A balancecompares the unknown weight to a standard weight using a horizontal lever. Weighing scales are used in many industrial and commercial applications, and products from feathers to loaded tractor-trailers are sold by weight. Specialized medical scales and bathroom scales are used to measure the body weight of human beings. The right choice in medical weight scales is crucial to doctors and hospitals. Whether digital or mechanical, such scales are crucial to the health care industry. Healthcare personnel constantly monitor the weight of their patients in order to determine the condition of their health and also to judge the effectiveness of their treatment and end of disease. When precise measurements are required in medical treatments, doctors depend on weighing scales that are specially designed for particular uses. The market is full of different suppliers of medical scales. 

         There are so many types of digital scales available in the market. These scales are mainly classified on the basis of usage. Some scales are used for a single purpose and some others are beneficial for multiple purposes. Some among the popular types of digital scales are baby, adult, food, nutrition, diet, bathroom, laboratory, animal, crane and truck, metal weighing, postage and shipping, and counting scales. Baby scales are used in hospitals, doctor’s offices, and even homes to know the growth rate of babies and infants on a regular basis. Food, diet, and nutrition scales are used to know the amount of food intake. These types of digital scales are well suited for body builders and individuals who are conscious about their weights. Bathroom scales help you to take individual weights. These scales are most often obtained with additional features including body fat measurements. Laboratory scales find use in medical and scientific areas where small particles such as dust and lint are to be measured. Animal scales are designed to weigh farm animals and pets. These scales are made special for different animals and birds so as to keep them comfortable and relaxed while weighing. Crane scales are generally hanging scales with some sort of lifts to take the heavy objects. Truck scales take vehicle weights including that of tankers and rigs. Medical weight scales are designed around the needs and utility of the patients and invalids. Apart from the digital bed scales there are wheel chair scales, hand rail scales, and chair scales. 

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