Filters for model 43 smoke stain reflectometer made by Evans Electroselenium Ltd, Halstead. 23 paper filters in total, 21 used, two unsued. filters for smoke stain reflectometer
Model 43 smoke stain reflectometer and filters made by Evans Electroselenium Ltd, Halstead. Model 43 smoke stain reflectometer made by Evans Electroselenium Ltd
Chromatograph Scanner; EEL. Serial no.14/1297 Chromatograph Scanner; EEL. Serial no.14/1297 1900-1980
Clinical flame photometer, model 150, by Evans Electroselenium Ltd., British, c.1960-1970, with 6 boxes of spares Clinical flame photometer 1960-1970
EEL Chloride Meter, complete with extra cuvettes & electrodes & stirrers, operating instruction manual, serial no.92/1704 EEL Chloride Meter 1900-1980
Model 43 smoke stain reflectometer made by Evans Electroselenium Ltd, Halstead. Model 43 smoke stain reflectometer made by Evans Electroselenium Ltd
EEL (Evans Electroselenium Ltd), Harlow, reflectance spectrophotometer (galvanometer No. 100,723), 1953. Main unit and two smaller ones. EEL (Evans Electroselenium Ltd) 1953
Photoelectric Colorimeter EEL, with set of filters and matched test tubes Photoelectric Colorimeter EEL 1900-1980
EEL Spectra Spectrophotometer with operating instruction manual, quotation and calibration EEL Spectra Spectrophotometer with operating instruction manual 1900-1980
EEL Photoelectric colorimeter wooden box for glass tubes, containing three tubes EEL Photoelectric colorimeter wooden box for glass tubes 1900-1980