osmoscope

plural osmoscopes

1. An instrument for detecting and for measuring odors.

   Odorless air enters osmoscope through side tube where it is mixed with odorous test air which enters from end tube.

   1949, Carey Pratt McCord, William N. Witheridge, Odors, Physiology and Control, page 47

   2 more examples

   Test for odor, using a normal inhalation. If an osmoscope is used, insert the tube of the osmoscope to a point just above the surface of the water and test for odor as above.

   1954, American Society for Testing Materials. Committee D-19 on Industrial Water, Manual on Industrial Water, page 314

   The osmoscope may be used by increasing the dilution of air until the odor vanishes, or decreasing the dilution until the odor is first detectable.

   1957, The Journal of the American Dental Association - Volume 55, page 42

2. An instrument for measuring osmosis.

   The osmoscopes developed in the authors' laboratory are comparable in their basic concept with the grease-spot photometer employed by Bunsen to measure the intensity of a light source.

   1935, Sewage Works Journal, volume 7, page 198