Honeywell's 85000 Series Quartz Plus meters are direct current hour meters designed for legendary performance and reliability in a technically advanced quartz package. The meters feature a rugged drive mechanism inside a shock-proof, tamperproof, totally sealed case. They are suitable for applications requiring accurate run time tracking, such as maintenance records, leasing applications, and warranty programs. The meters offer features like a custom CMOS integrated circuit, a totally sealed case, a wide temperature range, and protection against transient voltage and reverse polarity.