This instrument is aimed to be mounted on front face of monitoring switchboards. The electromechanical counter that counts the operating hours of a machine or piece of electrical equipment. Giving a precise indication of operating time, the counter is used to decide when to carry out preventive maintenance. The counter is powered by a 12V to 36V DC supply. The electromechanical display is composed by 5 digits plus 2 for decimals, and indicate operating time up to 99,999.99 hours. This instrument do not have a reset button. The dimensions of the product are 48mm by 48mm and 39mm in depth.