Hobbs 85000 Series Quartz Hour Meter, Two-screw mounting with black bezel, 10 Vdc to 32 Vdc, 10K hours. IP66 Sealing. With its highly reliable drive mechanism, the Honeywell Hobbs 85000 Series features an odometer gear train and accurate quartz crystal timing to provide enhanced performance. UL/CSA recognized, with a variety of mounting styles. An improved odometer gear train, plus snap-together chassis, fits into a shock-proof, totally sealed case often resistant to many acids and solvents. All parts are in-process inspected. Every meter must pass a 100% function, burn-in, and timing accuracy test before shipping.