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A thermal energy meter is a meter designed to measure thermal energy, which is transferred in a thermal energy exchanger to a liquid called heat transfer fluid.
A thermal energy meter is either a compact meter or a combined meter consisting of subsets, i.e. a flow sensor, a pair of temperature sensors and a calorimeter, or a combination of a compact and a combined meter.
| Energy meters | Period |
|---|---|
| a) compact energy meters | 4 years |
| b) fluid flow meter | 4 years |
| c) temperature sensors | 4 years |
| d) temperature sensors with built-in transducer | 2 years |
| e) pressure and differential pressure sensors | 2 years |
| f) evaluation units of combined heat and cool meters | 4 years |
| Water meters | Period |
|---|---|
| a) for cold water | 6 years |
| b) for hot water | 4 years |
| c) drum water meters | 2 years |
| d) water meters (volume) | 6 years |
|
e) cold and hot water meters used for cost allocation to the final consumers |
5 years |
For household consumption, measurements are permitted to be made by any Class 3 meter.
For commercial or light industry purposes, the use of a Class 2 meter is required.
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