30

U-value measurement made easy with testo 635-2

The U-value (formerly k-value) isthe most important value used torate the energy efficiency ofbuilding components. With the new testo 635 measuring this value has never been easier.Three temperature values areneeded to determine the U-value: outer temperature, surface temperature of inner wall as well as indoor air temperature. Using the new wireless probes,the outer temperature can be quickly and easily measured with the window closed. The probe is simply positioned outside and transmits readings by radio to the measuring instrument in the room.With the new patented U-valueprobe the two other temperatures required are measured using oneprobe. To measure surfacetemperature, three wires from the U-value probe are attached to the inner wall using modelling clay. The air temperature is measuredby a sensor on the probe plug.As soon as the threetemperatures required are transmitted to testo 635, the instrument calculates the U-value and displays it immediately.

Measures the U-value in a wall in need of renovation using U-value and wirelesstemperature/humidity probe (alternatively conventional temperature probe also possible) Measures wall surface temperature using three fast-action thermocouple sensors

U-value measurement made easy with testo 635-2

testo 635-2, humidity/temperature measuring instrument with readings memory,PC software and USB data transmission cable, with battery and calibration protocol0563 6352 Radio immersion/penetration probe, NTC, approval for the countries: DE, FR, UK,BE, NL, ES, IT, SE, AT, DK, FI, HU, CZ, PL, GR, CH, PT, SI, MT, CY, SK, LU, EE, LT, IE, LV, NO0613 1001 Or alternatively Radio handle for plug-in probe heads, incl. T/C adapter, approval for thecountries: DE, FR, UK, BE, NL, ES, IT, SE, AT, DK, FI, HU, CZ, PL, GR, CH, PT, SI, MT, CY, SK, LU, EE, LT, IE, LV, NO0554 0189 Humidity probe head, attachable to radio handle0636 9736 Radio module for measuring instrument, 869.85 MHz, approval for the countries:DE, FR, UK, BE, NL, ES, IT, SE, AT, DK, FI, HU, CZ, PL, GR, CH, PT, SI, MT, CY,SK, LU, EE, LT, IE, LV, NO0554 0188 Temperature probe to determine U-value, triple sensor system for measuring walltemperature, modelling clay included Accuracy: U-value: ±0.1 ±2% of fsv(when used with an NTC or wireless humidity probe for measuring outside temperature and 20 K difference between the airinside and outside) 0614 1635

Temperature probe to determine U-value, triple sensor system for measuring wall temperature, modelling clay included Part no.0614 1635

Service case for basic equipment of measuring instrument and probes,dimensions: 400 x 310 x 96 mm0516 0035 ISO calibration certificate/U-value probe0520 0481 DKD calibration certificate/U-value probe0520 0981