HYGROMETER (VERSIONS) Russian patent published in 2009 - IPC G01N25/56 

FIELD: physics.

SUBSTANCE: hygrometer includes cooling system, measuring chamber, temperature sensor, light source, photodetector, inlet and outlet manifolds, valves, pressure gauge, flowmeter and cooler. Cooling system includes flat groove recess parallel to the axis of the measuring chamber and the aperture thereover covered with shielding glass with light source above. According to the version 2, hygrometer comprises photodetector mounted together with light source. According to the version 3, hygrometer includes the second photodetector along the axis of the measuring chamber.

EFFECT: higher measurement accuracy of gas dew point and design simplification.

3 cl, 4 dwg