From 1887 to 1892, with airship designer Rudolf Hans Bartsch von Sigsfeld (1861–1902), he developed a psychrometer for accurate measurement of atmospheric humidity and temperature. This was the first instrument that was able to provide reliable temperature readings with high altitude balloons, as it was capable of shielding its thermometric elements from solar radiation. The technical implementation and production of this device took place in the factory of Rudolf Fuess (1838–1917).