Liquid Film Hygrometer

Science  06 Mar 1964:
Vol. 143, Issue 3610, pp. 1031-1032
DOI: 10.1126/science.143.3610.1031


An improved method of humidity measurement based on the dielectric constant of a liquid-solid mixture has shown agreement with a simple theory. The hygrometer has shown no measurable hysteresis and has identical time-response characteristics for increasing or decreasing humidity.