You can now pre-order the meters with calibration 2019 from us, the first ones will be in KW1 in 2019

Ultraschall-Wärmezähler Qundis Qheat 5 US Qn 2,5 5,0 mm

Item number: HMR500A12090-angebot

Including calibration 2019 - 2024

124,85 €

including 19% VAT. , plus shipping

Old price: 137,85 €
Upon request!

Delivery status: in store

Shipping time: 8 - 9 workdays

Please pay attention to the new MID directive and the associated changover to direct measurement.


The Qheat 5 US is the direct successor of the Kundo G20.


The calibration from 2019 -2024 is included in the sales price.


The counter is suitable for a heating capacity of up to 40 KW.



Technical specifications:


Nominal flow rate Qn (Qp): 2.5 m³ / h

Electromagnetic class E1

Mechanical class M2

Environmental class A

Measurement accuracy class 3

Immunity to interference: EN 610000-6-2

Interference emission: EN 61000-6-3

European Measuring Instruments Directive (MID): 2004/22 / EC

EC type-examination certificate: DE-14-MI004-PTB006




Temperature sensor: 5,0 mm

Installation: any

Starting limit q0: 2.5 l - 6,5 l / h

Minimum flow rate Qi: 25 l / h

Maximum flow Qmax: 5000 l / h

Ratio qp / qi horizontal 1: 1000

Nominal pressure Pn: 16 bar

Minimum system pressure to avoid cavitation (cavitation) 1 bar

Installation length: 130 mm

Connection thread on counter: approx: 1"

Ambient temperature 5 ... 55 ° C

Temperature range: 20 - 90 ° C

Maximum temperature (short-term): 110 ° C

Permissible temperature difference: 3 K 160 K

Start of counting: temperature difference: 1.0 K

Power supply: Lithium battery Nominal voltage 3.0 V

Duration:> 6 years (10 years)

Protection class: IP 65 according to EN 60529

Display levels: min. 2, up to 10 (depending on the version and options included)

Display: 8-digit LCD + pictograms

Energy display: kWh (opt. MWh, MJ, GJ)

Cable length: approx. 80 cm

Mass: 530g

(Subject to change)


Temperature sensor:


Measuring element: PT 1000 according to EN 60751

Execution: Type DS

Diameter: 5.0 mm (optional 5.2 mm)

Installation: directly via MID ball valve or indirectly via immersion sleeve

Cable length: standard 1.5m (optional 3.0m)

Shipping weight: 0,75 Kg

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