Bb sensors humidiity reference cells bb sensors refz 12z 11rh this humidity reference cell is used for the checking and adjustment of capacitive type humidity probes the cell can also be used in scientific applications as a humidity standard the cell has a test chamber that is separated from the solution by a diaphragm so that the test sensor is not contaminated by the solution and the high quality diaphragm enables the contactless checking of measuring probes applications include calibr