|Power output||300-450 W|
|Max temperature||425 Deg C|
|Vacuum flask||1 L|
|Dimensions||800x450x650mm (experimental unit) (LxWxH)|
|Weight||110 kg approx.|
|Dimensions||1400x800x1630 mm (LxWxH)|
|Power consumption||216 W|
|Cooling surface||1600 mm2|
The measurement of air humidity plays an important role in many branches of industry, e.g. during drying or in the air conditioning of buildings and vehicles. There are different measuring methods to determine humidity. The trainer WL 201 enables the measurement of air humidity with four different instruments which can be directly compared to each other: two different hygrometers, a capacitive hygrometer and a psychrometer.
|Weight||35 kg approx.|
|Dimensions||600x400x680 mm (LxWxH)|
|Bourdon tube pressure gauge||24 bar|
|Temperature limiter||200 Deg C|
In a closed system filled with fluid, a thermodynamic equilibrium sets in between the fluid and its vaporised phase. The prevailing pressure is called vapour pressure. It is substance-specific and temperature-dependent. When a fluid is heated in a closed tank, the pressure increases as the temperature rises. Theoretically, the pressure increase is possible up to the critical point at which the densities of the fluid and gaseous phases are equal. Fluid and vapour are then no longer distinguishable from each other. This knowledge is applied in practice in process technology for freeze drying or pressure cooking.