The installation of temperature sensors at Heat and cold meters Installation must be carried out according to standards. Direct-immersion installation has been legally required since 2007. Avoiding errors during pre-installation saves on later conversion costs and ensures legally compliant measurements.
Direct-immersion temperature sensors are now mandatory.
Since the Measuring Instruments Directive (MID) came into force in 2007, only direct immersion temperature sensors are permitted for new heat meters. This also applies without exception to cold meters. This type of sensor offers the highest measurement accuracy and is now standard in the housing industry and among skilled tradespeople.
Installing temperature sensors: How tradespeople can avoid costly mistakes
The following applies to the planning and installation of new heating systems:
- The heat meter is often not yet known at the start of the project.
- A neutral pre-configuration is therefore crucial in order to be able to react flexibly to any approval (MID or legacy devices).
- Poor planning can lead to the need to later replace immersion sleeves with ball valves with sensor connections – this causes avoidable costs.
- Direct-immersion sensors are backward compatible and allow the installation of both types of meters.
Planning security for engineers and specialist planners
Planners also have a responsibility to correctly plan for the installation of temperature sensors:
- Manufacturer-neutral tenders are mandatory.
- Immersion sleeves often only fit certain manufacturers and are technically outdated.
- The PTB guideline K9 (valid from 2012) requires direct submersion installation – even for systems with long operating times.
- This method is particularly accurate when there are small temperature differences (e.g., in underfloor heating or ventilation systems).
Building owners benefit from greater flexibility
This offers a clear advantage for owners:
- The installation of direct immersion temperature sensors enables a manufacturer-neutral decision when buying or renting a meter.
- Modifications to the pipe network are avoided.
- More accurate measurement results prevent billing errors and potential disputes.
- Standard-compliant pre-installation increases investment security.
Technically superior – and economically sound
The advantages of direct-diving installation:
- Higher measurement accuracy
- Lower susceptibility to errors
- Installation independent of meter manufacturer
- No additional costs for device replacement
- Meets all legal and technical requirements
Since 2012, the PTB TR K8 (Technical Guideline for Temperature Sensors in Heat Meters) has mandated direct immersion installation in pipelines.
Conclusion: Proper installation of temperature sensors is worthwhile.
Direct immersion temperature sensors are now state-of-the-art and legally required. They ensure reliable measurement results, avoid high conversion costs, and offer maximum flexibility in meter selection.
recommended action
Prepare new heating and cooling systems eternity Preparatory steps for the installation of direct immersion temperature sensors. Use ball valves with a suitable bore for this purpose. Have the installation carried out only by trained specialists and ensure compliance with PTB guidelines.
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Quelle: Handbuch der Wärmekostenabrechnung | Frank Peters Minol Messtechnik W. Lehmann GmbH & Co. KG, 2019
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