Hot water meter is a temperature compensated meter that permits the monitoring and recording of hot water flows in domestic hot water and central heating installations. It is used to indicate the quantity of water flowing through the boiler. This meter is used for the measurement or control of hot water, or for heat control of boilers in collective housing, hotels and factories. The measuring element is a vane wheel type. The materials are special resin and metals. Te meter can endure a maximum temperature of 100°C with a magnet coupling system incorporated in transmission mechanism. It allows remote indication and centralized indication.