Muller operating hours counter din rail mount muller bg7018 the muller bg 7018 operating hours counter is suitable for installation in din rail and uses a 12 48v dc power supply the 5 digit 6 segment counter on the front panel is easy to read the counter is easy to install and has screw terminals and touch proof connections the slim fit flush mount counter measures 85 x 175mm muller bg7018 operating hours counter din rail mount 45x175mm 12 48vdc