The ZHA gear flow meter series (A for aluminum design) are flow meters which are mainly used in lubrication and non-lubrication liquids. They are equally suitable for filled, viscous and abrasive media. Only high-strength aluminum is used in manufacturing the gear flow meters. Combined with the use of high quality precision ball bearings, the ZHA guaran-tees optimum measurement accuracy and a long service life even under the toughest application conditions.