Describes the MEX2 photometer of Eur-Control. It comprises probes, logarithmic units, and memory units, is suitable for on-line use and is not sensitive to soiling and to ageing of lamps. Two lamps with photometers opposite them light up alternately. The ratios of the currents are mathematically manipulated so as to eliminate the lamp currents. The output signal is proportional to the ratio of the photoelectric cell currents. The instrument is suitable for direct measurements in settling tanks, industrial sludge ducts and municipal sewage installations.
Photometric measurements of concentrations and turbidity
Photometrische Messungen von Konzentrationen und Truebung
Titel niederlaendisch
Polytechnisch Tijdschrift. Editie Elektrotechniek, Elektronica ; 32 , 11 ; 637-638
1977
2 Seiten
Aufsatz (Zeitschrift)
Niederländisch
Photometric Measurements of Simulated Lunar Surfaces
NTIS | 1965
|Photometric Measurements of Simulated Lunar Surfaces
NTIS | 1965
|NTRS | 1979
|