Holykell level sensors offer technically as well as economically attractive solutions for a wide range of level measuring tasks. In high-volume projects as well as in smaller quantities, you always benefit from the highest quality products and competitive price. Holykell sensors own approved CE, RoHs, ATEX, FCC and SGS international certificates. Holykell instruments are reliable and safe for water,oil liquid measurement and control of medicine, metallurgy, electricity, mine, city water supply, drainage and hydrology etc.