Badger Meter: The Model IOG line is designed for a variety of applications including petroleum-based fluids, water solutions and other highly viscous fluids. Flow meters are available in aluminum with liquid crystal polymer gears, for petroleum, non-acids, oil, paint and ink applications. Designed to withstand extreme conditions where conventional meters fail, Model IOG is ideal for high-viscosity liquid and provides extremely high accuracy, even in low-flow environments. With an accuracy rate of ±.5 percent, it meets or exceeds industry accuracy requirements.