Method and equipment for measuring vapour flux from surfaces
First Claim
1. Equipment for measuring the water vapour flux from a surface which equipment comprises a cylinder with a first end which is adapted to be placed against the surface and at least one sensor which is able to measure the relative humidity or the relative humidity and temperature or quantities from which the flux of water vapour from the surface inside the cylinder can be calculated, which sensor is positioned adjacent a wall of the cylinder, wherein said at least one sensor is mounted on the outside of said cylinder and there is a hole through said wall of the cylinder which hole and sensors are sealed against the atmosphere outside the cylinder.
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Accused Products
Abstract
A method and equipment for measuring vapour flux from a surface (10) e.g. the rate of water loss from human skin, which is useful in the evaluation of the efficiency of the skin/water barrier. It uses a closed cylinder (12), which is placed against the skin and by measuring the temperature and relative humidity within the cylinder by means of sensors (13, 14) positioned adjacent the wall of the cylinder, the water vapour flux can be determined.
26 Citations
29 Claims
- 1. Equipment for measuring the water vapour flux from a surface which equipment comprises a cylinder with a first end which is adapted to be placed against the surface and at least one sensor which is able to measure the relative humidity or the relative humidity and temperature or quantities from which the flux of water vapour from the surface inside the cylinder can be calculated, which sensor is positioned adjacent a wall of the cylinder, wherein said at least one sensor is mounted on the outside of said cylinder and there is a hole through said wall of the cylinder which hole and sensors are sealed against the atmosphere outside the cylinder.
- 10. A method for measuring the water vapour flux from a surface which comprises enclosing a zone adjacent to the surface within a cylinder by placing the open end of the cylinder against the surface and measuring the relative humidity and temperature or quantities from which the flux of water vapour from the surface can be calculated by means of at least on sensor positioned adjacent the wall of the cylinder, wherein the sensors are mounted on the outside wall of the cylinder and there is a hole through the wall of the cylinder which hole and sensor are sealed against the atmosphere outside the cylinder.
- 16. A method for measuring the water vapour flux from a surface which comprises enclosing a zone adjacent to the surface within a cylinder by placing the open end of the cylinder against the surface and measuring the relative humidity and temperature or quantities from which the flux of water vapour from the surface can be calculated by means of at least on sensor positioned adjacent the wall of the cylinder, wherein there is a hole through the cylinder wall and the sensors are mounted at least partially within such hole and the hole and sensor are sealed against the atmosphere outside the cylinder.
- 22. Equipment for measuring the water vapour flux from a surface which equipment comprises a cylinder with a first end which is adapted to be placed against the surface and at least one sensor which is able to measure the relative humidity or the relative humidity and temperature or quantities from which the flux of water vapour from the surface inside the cylinder can be calculated, which sensor is positioned adjacent a wall of the cylinder wherein there is a hole through said cylinder wall and at least one sensor is mounted at least partially within said hole and said hole is sealed against the atmosphere outside the cylinder.
Specification