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Ritchie's photometer

Ritchie's photometer

1827-1856
Decoudun photometer

Decoudun photometer

1800-1950
Photometer model S511 by Weston

Photometer model S511 by Weston

Joly's photometer by Griffin and George Ltd.

Joly's photometer by Griffin and George Ltd.

1954-1983
Portable photometer

Portable photometer

Lummer-Brodhun photometer

Lummer-Brodhun photometer

Holophane-Edgcumbe Auto-photometer in box

Holophane-Edgcumbe Auto-photometer in box

Lummer Brodhun photometer head

Lummer Brodhun photometer head

Photometer, marked: ‘39 G’

Photometer, marked: ‘39 G’

Everett Edgecumbe photometer, no. 356504

Everett Edgecumbe photometer, no. 356504

Lummer Brodhun photometer

Lummer Brodhun photometer

1900-1980
One Lummer-Brodhun photometer head

One Lummer-Brodhun photometer head

Photometer, marked: ’34 G’

Photometer, marked: ’34 G’

Wild flicker photometer

Wild flicker photometer

Spectro-photometer

Spectro-photometer

1900-1980
Holophane-Edgecombe street lighting photometer in purpose built oak box

Holophane-Edgecombe street lighting photometer in purpose built oak box

circa 1950
Everett Edgcumbe auto photometer

Everett Edgcumbe auto photometer

Flame photometer

Flame photometer

Beads for Wheatstone's photometer

Beads for Wheatstone's photometer

Flicker photometer mounted on short metal rod

Flicker photometer mounted on short metal rod

1900-1980
Modified spurge photometer.

Modified spurge photometer.

Spurge Photometer

Spurge Photometer

Simmance-Abady type Flicker photometer by Nalder Brothers & Co.

Simmance-Abady type Flicker photometer by Nalder Brothers & Co.

1905-1915
Knobel's astrometer

Knobel's astrometer

1890-1900
Wheatstone type photometer, in brass box, six cork discs with silvered beads, 1870

Wheatstone type photometer, in brass box, six cork discs with silvered beads, 1870

1870
Joly paraffin wax photometer

Joly paraffin wax photometer

1875-1899
Microphotometer Serial no. 206

Microphotometer Serial no. 206

Hilger H700 Flame Photometer

Hilger H700 Flame Photometer

Lowe jet photometer, c.1860.

Lowe jet photometer, c.1860.

Knobel's astrometer, in case

Knobel's Astronometer

1890-1900
Wheatstone type photometer, in brass box, six cork discs with silvered beads to give various curves, by William Ladd, London, England, 1870-1872

Wheatstone type photometer

1872
Autoanalyser Flame Photometer Mk III, by Technicon Corporation, Ardesley, New York 10502, United States.

Autoanalyser Flame Photometer Mk III

Oldham portable photometer, used for finding candle power of miner's lamps

Oldham portable photometer

Made in Switzerland. Hunter pattern watch type actinometer. In original carton with 2 packets of paper and instructions in German.

M and V Photometer Model B

Extinction meter with rotating continuous wedge; two blue filter settings; for use on camera ground glass screen; in leather purse.

Heyde's Aktino-Photometer

Photometer made by Schmidt and Haensch. (Described under Cat.No.369, physics catalogue, 1905 Ed.)

Photometer made by Schmidt and Haensch

Dr. Letheby's photometer, consisting of a Bunsen photometer-head and two movable carriages. Made by William Sugg, Gas Engineer, Westminster, London, S.W.

Letheby's Photometer

"Grey-Wedge Photometer", cased, by Keeler, London, 1950-1955

"Grey-Wedge Photometer"

1955
Phosphotometre Filmograph Comparison photometer - battery operated 2.5v bulb wired through variable resistance operated through pull-out slider calibrated 0-50. Lamp seen through sliding continuous wedge calibrated 0-50 and f/f2.7-14 (Pour Pathe Baby), then through lens and reflected in 45 degrees glass through which scene is observed. Small milled knob rotates blue filter over viewing aperture. Made by Les Establishments Filmograph, 47 Rue Bangreaux, Montrouxe. (M953)

Filmograph photometer

Photometer, Pulfrich, with numerous accessories and spare parts. No."Nr 36542". Including four books of instructions for use of the photometer & one on use of Ilford Colour Filters (see note)

Photometer, Pulfrich, with numerous accessories and spare parts

1900-1980
Exposure meter made for use with easrly technicolor process. Cylinder 7.7cm diameter, 13.2cm long 3 diameter lens at one end with hinged flap with 1cm diameter hole. Output from photocell read by Westinghouse meter calibrated 0-20. Scale marked average stops. Raise flap: divide by ten. Optical frame finder with pin and ball back sight. Conversion tables taped to cylinder. Scale reading 1.0-16.5, conversion 2.5-41.25. No.25.

Technicolour Reflection Photometer

Watt photometer by Everett and Edgcumbe

Watt photometer by Everett and Edgecumbe

Hurter and Driffield photometer made by J Willis Grundy. For comparison of light sources, standard of unknown. Fitted with Lummer-Brodhun head on rack mounted carriage; moving on calibrated scale; standard lamp aperture fitted with rotating disc with 4 apertures.

Hurter and Driffield Photometer

1903
Bunsen photometer

Bunsen photometer

EEL flame photometer, model A, made by Evans Electroselenium (patent no.7127 00)

EEL flame photometer

Photometer; 42mm diameter shallow brass mount, glass fronted; 6 tinted segments around central aperture for sensitive paper.

Woodbury Photometer

Exposure meter made for use with easrly technicolor process. Cylinder 7.7cm diameter, 13.2cm long 3 diameter lens at one end with hinged flap with 1cm diameter hole. Output from photocell read by Westinghouse meter calibrated 0-20. Scale marked average stops. Raise flap: divide by ten. Optical frame finder with pin and ball back sight. Conversion tables taped to cylinder. Scale reading 1.0-16.5, conversion 2.5-41.25. No.25.

Technicolour Reflection Photometer

Apparatus for measuring the brightness of the night sky (by comparison with fluorescent light excited by radiations from a uranium sample), by Robert John Strutt (4th Baron Rayleigh), England, 1900-1939

Apparatus for measuring the brightness of the night sky

1900-1939
Abney type colour photometer with rotating sector apparatus by Adam Hilger, London, 1888. commercial version of photometer used by Sir William de Wiveleslie Abney and Major-General E. R. Festing in their researches.

Abney type colour photometer with rotating sector apparatus by Adam Hilger

1888
Comparison photometer, possibly home made. Split field comparison. Direct vision through circular step wedge, blue tint, calibrated, 0, 10, 100, 1000, 1:10, 1:100, 1:1000. Mirror reflects illulmination from disc with step wedge, calibrated 160, 250, 400, 600, 1000, lit by small bulb. Powered by flat battery (Ever ready pat. 24008/08) through press switch and rheostat adjusted by screw from exterior of case. MEter connected across lamp. Calibrations for f/4.5 and 16sch. Table in Swedish giving shutter speeds for photometer settings.

comparison photometer