A LOW COST COMPACT MIXED FLOW RELATIVE HUMIDITY GENERATOR.

摘要

A compact mixed flow humidity generator comprises three concentric stainless steel containers forming the saturator(7.1), dry(7.2) and mixing(7.3) chambers and a dry nitrogen gas supply (cylinder) with a pressure regulator wherein the inlet manifold (8) divided to be passed through needle valves (1 & 2) to said saturator and dry chamber respectively wherein the said mixing chamber(7.3) being connected to both chambers dry and saturator through a of transfer tubes (4), the gas from needle valve (2) is made to pass through copper tubular coil (7 in Figure 2.) wherein escape from a thin copper tube acts as a bubbler (9 in Figure 2.) The relative humidity sensor could be placed in the mixing chamber from the access port (5). The mixture gas is then led to the test chamber from the outlet manifold (6).