Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
G01N21/72—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using flame burners
Elektrische Gluehlampe mit einstellbarem Schlagwetteranzeiger in Form einer mit fluessigem Brennstoff gespeisten Lampe, deren Zuendung durch die Gluehlampenbatterie erfolgt