U-Value Kit


Our U-value calibrated and plug-and-play solution allows to measure the thermal transmittance of a material or an assembly for the building industry. greenTEG’s unique solution allows to measure accurately U-Value (U-factor, Thermal transmittance), R-value and temperature of your building, wall, roof…


Do you need a U-value calculator?


Discover how to measure the U-value with greenTEG’s U-value and Heat Flux Measurement kit!

Our measurement-approach uses a heat flux sensor and two temperature sensors. This approach is standardized in ISO 9869, ASTM C1046 and ASTM C1155. This is the only method which delivers reliable quantitative in-situ information about a building envelope.

Features & Benefits

  • Calibrated Plug-and-Play solution.
  • Measurement of U-value (W/(m²K)), heat flux (W/m²), and 2 temperatures (°C).
  • Compatible with standards ISO 9869 and ASTM C1046 /ASTM C1155.
  • Stores up to 2 million data points.
  • Battery lifetime >1 month.
  • High sensitive thermal detectors.
  • Read-out software included.
  • Compact design.
  • USB interface.
  • Comes with MOUNT-1235 (double sided adhesive tape).

gSKIN® KIT includes (for more details consult the datasheets of the individual products):
Sensor: gSKIN®-XO 67 7C (30mm x 30mm), Logger: gSKIN® DLOG-4231 and double sided mounting tape (MOUNT-1235)
Heat Flux Range Min / Max [W/m²]: ±300
Heat Flux Resolution [W/m²]: <0.22 Temperature Accuracy [°C]: ±0.5 (-10…+46 °C) ±2.0 (-55…+125 °C) Min. Sensor Sensitivity (S) [µV/(W/m²)]: 7.0 (sensor calibration data already loaded onto logger for simple and fast plug-and-play measurements). Data Storage Capacity [# measurements]: >2’000’000
Battery Lifetime [days]: >30 at lowest measurement frequency (2/d). Rechargeable.
Software: Installation – SW sent by email / via download link
Logger Dimensions (mm): 52 x 20 x 15
Bit Resolution [bits]: 12
Operation Modes: Autonomous / Live
Operating Temperature Range Min/Max [°C]: -40 / 100 (-25 / 65 for Logger)
Operating System: Windows 2000 / XP / Vista / 7 / 8 / 10 / 11
Calibration Accuracy [±%]: 3 (Sensor calibration data already loaded onto logger for simple and fast plug-and-play measurements).
Calibration Temperature Range Min/Max [°C]: -30 / 70
Heat Flux Sensor Cable Length [m]: 1.5 (with connector)
Temperature Sensor 1 / 2 Cable Length [m]: 5.0 / 1.0
Measurement Frequency: 1/s to 1/h
Computer Interface: USB

  • Building Insulation Evaluation
  • Building Envelope Performance Monitoring
  • Zero-energy Building Assessment

All the use cases are available here!

To discover more applications and Use Cases, check our peer-reviewed publication section!

To discover more application, check our peer-reviewed publication section!

The U-value kit user manual is available here.