For heat meters and cold meters
For heat meters and cold meters
Temperature probes for direct installation
Steadily rising energy costs and strict legal requirements require highly accurate billing of the thermal energy consumed in heating or cooling systems.
An important component of the heat and cooling meters used for this purpose are the precise temperature probes for determining the temperature difference at the flow and return of the heating.
Temperature probes for measuring thermal energy, which are permissible for the demanding use in billing systems, are also available from us ready paired on request.
The Testo Sensor GmbH not only produces temperature probes for heat and cold meters according to your customer-specific specifications, but also keeps an eye on all standards and guidelines for proper approval.
Details for temperature probes for universal use (DS / PS)
Technical requirement for heat meter probes (universal use)
To ensure that heating and cooling costs can be accurately allocated to the consumer and producer, a very accurate temperature measurement must take place. This follows strict legal requirements, because only in this way is a qualitative framework for reliable and comparable temperature measurements and thus heat and cold quantity counts possible.
Therefore, the conformity according to MID (Measuring Instruments Directive) of the EU, the European regulations for heat metering, is essential for our probes. There is currently no overarching European regulation in force for cold quantity metering; national regulations apply, e.g. according to the Measuring and Calibration Ordinance.
You can rest assured that the temperature probes from Testo Sensor GmbH fully meet or exceed all requirements for operation in conjunction with heat and cold quantity meters.
|Measuring range (depending on sensor and connection cable)||±0 °C bis +105 °C (PUR / PVC cable)|
|±0 °C bis +130 °C (TPE cable)|
|±0 °C bis +150 °C (Silicone cable)|
|Limit value temperature difference||3 K to150 K|
|Response time||< 4s (depending on the design e.g. Ø 5.0 / 5.2 mm significantly faster)|
|Measurement stability||10 years ( Please note recalibration cycles according to MID / MessEV)|
|Measuring elements||Please config (Pt100, Pt500 or Pt1000)|
|Tolerance||Class B according to EN60751|
|Connection type||Two-Wire technology|
|Measuring principle||resistiv (resistance value)|
Maximum measurement current
|Pt100: 1178 μA at 2,5 m and 0,0095 Ohm/m|
|Pt500: 795 μA at 12,5 m and 0,0095 Ohm/m|
|Pt1000: 562 μA at 255 m and 0,0095 Ohm/m|
|Installation||Direct installation acc.to DIN EN 1434 or installation in immersion sleeves acc.to tolerance list|
|Minimum immersion depth||≥ 20 mm|
|Max. pressure||P S 25 at flow velocity water 2 m/s|
|cable length according to DIN EN 1434||Pt100 max 2,5 m | Pt500 max 12,5 m | Pt1000 max 25 m|
|Environmental conditions||Protection class: IP 65 (acc.to DIN 40050) | Electrical: E1| Mechanical: M3 | Climatic: -25 °C to +70 °C|
|Please configure your temperature probe for heat and cold meters|
|A – Measuring element||B – Ø Probe shaft||C – Mounting length|
|Code||Meas.element||Accuracy||Code||Ø probe shaft||Code||Mount. length|
|A13||Pt100||Kl. B1)||B01||5,0 mm||C01||26,0 mm|
|A15||Pt500||Kl. B1)||B02||5,2 mm||C02||27,5 mm|
|A23||Pt1000||Kl. B1)||B03||6,0 mm||C03||38,0 mm|
|1)dT = ±(0,30 °C + 0,005 · T) acc. to IEC 751 / EN 60751 | Conn. type: 2-wire||C04||60,0 mm|
|Other probe shaft Ø between 5.0 and 6.0 mm as well as other mounting lengths and customised screw connections are available on request.|
|J – Process connection||D – Material connection cable|
|J00||without screw connection||D01||2-wire||black||±0°C||+105°C||PVC||rt, ws||0,22|
|J02||M10 x 1 incl.
locking screw &
|Further or customised screw fittings are available on request|
|E – Length||G – End seleeves||P – Standard|
|E01||1,5 m||G01||Wire end ferrules (standard)||P00||not paired|
|E02||2,5 m||G02||Tin-plated connection leads
(only for probes permanently
connected to the calculator)
|P01||paired according to DIN EN 1434|
|P02||paired according to DIN EN 1434 with conformity assessment / marking
according to MID (heat)
|P04||paired according to DIN EN 1434 with conformity assessment / marking
according to MessEG (cold Austria)
|We offer other cable lengths between 0.3 m and 25 m in increments of 0.5 m. Please note the maximum lengths (depending on the sensor): Pt100
max 2.5 m | Pt500 max 12.5 m | Pt1000 max 25 m
Technical drawing & mounting instructions
A = Meas. elements
B = Ø Probe shaft
C = Mount. length
D = Cable material
E = Cable length
J = Process connection
G = Wire end
P = Standard
|The installation of temperature probes in pipelines (qp ≤ 6) must be carried out directly in new installations in Germany. Please carry out direct installation of temperature probes in accordance with DIN EN 1434-2 and the technical guideline TR-K8 (see following figure).|