Patent ID: 8252600
Filing Date: 2012-08-28
Classification: G01N

Abstract:
1. Portable measuring device for measuring the salinity, the acidity (pH) or other chemical and physical parameters on different types of surfaces, whereby the measuring device comprises electronic circuits, a measuring unit and a housing in which a test chamber has been formed, whereby the test chamber is provided with: 1) a first opening that can be positioned against a surface to be tested, 2) a second opening through which a fluid can be introduced into the test chamber, 3) a resilient seal for sealing the test chamber where the test chamber is brought against the test surface area, 4) a number of sensors taken up in the test chamber that are connected to the electronic circuits and the measuring unit for indicating the value of the chemical or physical parameter to be measured of the fluid contained in the test chamber, characterized in that the measuring device further comprises means for varying the volume of the test chamber, wherein the means for varying the volume reduces the volume of the test chamber to substantially zero.