Control boxes K are equipped with signal lamps and/or control push buttons manufactured by SN „PROMET” according to the catalogues of products, but also non standard versions are possible on special customer demand. In standard version each box is equipped with one seal. The type of gland can be found in a table. Non standard versions can have a second seal on the opposite wall of the case. There is a possibility of making descriptions of all functions of lamps and push buttons, on special labels on the front panel. Casing is made in two versions: standard - ABS and in version with increased resistance from strokes, acids and temperature - made of PC. There are two colours of casing: yellow and grey. Control boxes are adapted for installation in closed spaces almost free of dust, gas and inflamable or chemically active vapours.