Presence of liquid, especially water, often in trace amounts is moisture. Moisture is an important factor, which determines the quality of the paper. Paper moisture meters are used to measure the moisture percentage of water in the paper or in a specified material. On a flip side, vital part of the process is to control the moisture of the product. The information obtained with moisture meter indicates whether the paper is ready for use or not (if not then it will lead to further inspection). Paper products are very sensitive to moisture measurement. If the moisture content is low: cracking at punching, if it is high: ink drying will be slow, and results in set off problem. By moisture content in paper, its physical properties are strongly affected along with the changes in dimension. In various printing processes printability and reliability depends upon the quality of the paper. Total weight of paper is determined by the amount of water contained in the paper. The major constituents of paper, fibers of cellulose, have a strong affinity for water, and will gain (or lose) it readily, depending on the amount of moisture in the air, or the relative humidity of the surrounding environment. With growing need for more features such as less cost, not only measure water content, but also relative humidity and temperature among others is anticipated to be the major target market in near future.