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TDW 4040

Test chamber to determine the stationary heat transfer properties with a heat flow meter according to DIN EN 1934


The compact test chamber TDW 4040 was designed for testing brickwork (such as brick, lime sand brick, concrete, aerated concrete) and basically simulates the temperature and the natural convection inside and outside a building. Optionally the humidity level in both sections of the chamber can be set as needed. The setting of all parameters, complete data logging, detailed analysis and printing of test reports is performed via the software HotBox 2016 at the measurement and control unit. Additionally available devices, accessories and materials enable the sample preparation and conditioning to optimize the testing procedure.


  • Insulated warm and cold section with heat exchangers and air deflectors, radial fans, roll chassis on guiding rails and 12-point locking system
  • Insulated test frame with roll chassis and openings for sample insertion via forklift
  • Recirculation cooler with water cooling for temperature control of warm and cold section
  • 2 isothermal blocks with 60 measuring points each, 1 set thermocouples, flow sensors, 1 heat flow meter with guard plates
  • Panel with 19“ measuring and control modules, PC, printer and 23“ monitor
  • Interfaces: 2x RS232, 5x USB, 1x Gigabit Ethernet
  • Single license for software HotBox 2016
  • 1 set calibration panel with factory calibration certificate
  • 1 set stainless steel guide rails for warm and cold section

Technical Data:

TDW 4040
Measuring range R: 0.10 – 8.00 m²×K/W
U: 0.12 – 3.70 W/m²×K
Sample dimensions (L x W) 150 x 150 cm
Sample thickness (T) 24, 36, 48 cm
Temperature range
Cold section
Warm section
-10 °C – +40 °C
+10 °C – +40 °C
Dimensions (H x W x D) 290 x 310 x 320 cm (closed)
290 x 450 x 320 cm (open)
Power Supply 230 V / 400 V / 50 Hz
Weight 3890 kg