Honeywell's 85000 Series Quartz Plus hour meters are designed for reliable performance in a technically advanced quartz package. These meters feature a rugged drive mechanism inside a shock-proof, tamperproof, totally sealed case, making them suitable for harsh environments. They are ideal for tracking run time on equipment in transportation applications, ensuring proper maintenance and warranty programs. The meters offer a wide voltage range, custom CMOS integrated circuit, and transient voltage protection, ensuring long-lasting and accurate operation.