Overview BARTON 7000 Series liquid turbine meters are designed for a broad range of precise liquid measurement applications. Based on more than 40 years of turbine manufacturing experience, this built-to-order series features a range of sizes, materials, bearing systems, and options. Specifications Standard Features Linearity (BARTON Models 7100 and 7200) ±1% of reading over flow range for meters smaller than 1" ±0.25% of reading over flow range for meters 1" and larger ±0.15% of reading over limited ranges for 1" meters and larger (contact local sales office for details) Linearity (BARTON Model 7300) ±0.25% of reading over flow range ±0.15% of reading over limited ranges (contact local sales office for details) Repeatability ±0.02% of reading Symmetrical Bi-Directional Design – Ideal for reverse flow applications where flow capacities are the same in either direction. Electronic options provide instantaneous flow direction sensing. High-Quality Bearings – Model 7100 and 7300 meters come standard with wear-resistant tungsten carbide sleeve bearings, and model 7200 meters are designed with self-lubricating, precision stainless steel bearings with dry lubricant impregnated ball separators.