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Dawson's Densitometer

Ferguson Wedge Density Meter for Photographic Plates

1911

Accessories case for microdensitometer, 1978

1978

Parry densitometer

1970-1980

BPRA Photoelectric Densitometer

circa 1930

Digital density meter DMA 35 made by Anton Paar

DMA 58 Digital Density Meter

1993

Video monitor for microdensitometer, 1978

1978

Microdensitometer video camera, by Ikegami Tsushinki Co. Ltd, Japan, 1978

1978

Densitometer. First demonstration model.

Two ground glass windows in wooden box; one lit by light passing through test sample, the other by light passing trhough disc with holes of graduated size. In original carton.

Dawson's Densitoometer

Split-field comparison of sample density with step wedge. Wedge cracked; modified; negative retaining clip removed, neutral density added to wedge aperture.

Sangar-Shepherd Density meter

Matching densitometer for assessing X-Ray pastilles, X-Rays Limited, 11 Torrington Place, Gower Street, London WC1

Matching densitometer for assessing X-Ray pastilles

Improved Capstaff-Purdy type. Lever operated microswitch for lamp, No 181.

Kodak Transmission densitometer Model 2

Electroflo smoke density meter (in parts for a demonstration)

Electroflo smoke density meter

Microdensitometer used to measure the X-ray density of tree rings in research into past climates, 1978

Microdensitometer used for dendro-analysis, 1978

1978

Kodak Colour densitometer, Model 1, manufactured by Kodak Ltd, London, England, c. 1950.

Kodak Colour Densitometer, Model 1, c. 1950

1950

P + F Equipment. Improved Sanger-Shepherd Density meter. E.S.S. Colour Filter Co., London. For measuring printing density of negatives. Negative density compared with continuous wedge.

Improved Sanger-Shepherd densitometer

Microscope/densitometer, Vickers Model M85

Microscope/densitometer, Vickers Model M85

1978

Gelman scanning densitometer, DCD-16, model no.39431, serial no.1007, made in USA, 1960-1990

Gelman scanning densitometer

Joyce-Loebel Scandig 3 drum scanning densitometer, early 1970s. First used in University College London's Department of Physics to digitise photographs obtained from the UK space programme and transferred in the late 1970s to the then Department of Chemical Crystallography for digitising X-ray diffraction exposures under the supervision of Dr Monica Mendelsohn. Originally operated in conjunction with a Data General Nova computer, but operated by a Plessey LSI 11 computer (equivalent to a DEC PDP 11) when used in Chemical Crystallography. The X-ray film was attached to the drum with sticky tape. Last used in the early 1990s.

Joyce-Loebel Scandig 3 drum scanning densitometer

1970s

Plastic case containing spare bulb and pens for printer for microdensitometer used to measure the X-ray density of tree rings in research into past climates, 1978

Spare bulb and pens for printer for microdensitometer

1978

Computer with leads for microdensitometer used to measure the X-ray density of tree rings in research into past climates, 1978

Computer with leads for microdensitometer

1978

Electrical box with LEDs for microdensitometer used to measure the X-ray density of tree rings in research into past climates, 1978

Electrical box with LEDs for microdensitometer

1978

Computer keyboard for microdensitometer used to measure the X-ray density of tree rings in research into past climates, 1978

Computer keyboard for microdensitometer

1978

4-way plug connector (continental) for microdensitometer used to measure the X-ray density of tree rings in research into past climates, 1978

4-way plug connector for microdensitometer

1978

Foot control pedal for microdensitometer used to measure the X-ray density of tree rings in research into past climates, 1978

Foot control pedal for microdensitometer

1978

Unused roll of printer graph paper in sealed plastic bag for microdensitometer used to measure the X-ray density of tree rings in research into past climates, 1978

Unused roll of printer graph paper for microdensitometer

1978

Table-top desk with end rollers for examining trace paper from microdensitometer used to measure the X-ray density of tree rings in research into past climates, 1978

Table-top desk from microdensitometer

1978

Ferguson bench density meter, No. V, for photographic plates, 1924, on wooden stand.

Ferguson bench density meter

1924

Harvey densitometer, c. 1960

Harvey densitometer, c. 1960

1960

'Laurence' Recording Densitometer, used by the Equine Research Station, Newmarket, for the diagnosis of veterinary parasitic infections, 1960-1971, by the Locarte Company, 24 Emperor's Gate, London, SW7, England, 1960.

'Laurence' Recording Densitometer

1960

Photoelectic densitometer, by Cambridge Scientific Instruments Co.

Photoelectic densitometer

1900-1980

Capstaff-Purdy pattern; visual matching of brightness of ccentral spot, lit by electric lamp through disc continuous wedge and specimen. With directly lit peripheral field.

Eastman Densitometer

Capstaff-Purdy type; rotating continuous wedge; eyepiece with colour filter wheel.

Eastman Densitometer

Comparison of brightness of two ground glass windows, one lit by sample, the other by light through graduated holes in rotating disc.

Dawson's Densitoometer

Wooden, with brass eyepiece; mirror system to split field; continuous wedge, with special artificial light adaptor made by donor. In fitted wooden box.

ESS refelction densitometer

Capstaff-Purdy type; rotating continuous wedge. No 203.

Kodak Transmission densitometer

Wooden box on hinged base with double mirror system giving split viewing field observed through tube with one eye piece. Calibrated continuous wedge (broken) moves in slide over one aperture, hinged wooden strip with opal glass fits over other aperture. In wooden box.

Comparison Densitometer

Kodak Colour Densitometer model 1

Kodak Colour Densitometer model 1

Console for microdensitometer, Model 3CS, by Joyce-Lobel Ltd., Gateshead, England, 1978. Used to measure the X-ray density of tree rings in research into past climates.

Microdensitometer for tree ring analysis, by Joyce-Loebl Limited, 1978

1978

Baldwin Wide Range 380

Baldwin Wide Range Densitometer

Integrating microdensitometer, type GN2, by Barr and Stroud Ltd., Glasgow and London, 1965-1975

Integrating microdensitometer

Double-beam recording microdensitometer, Mark III CS, serial no. 620 by Joyce-Loebl & Co. Ltd., Gateshead-on-Tyne, on trolley with accessories

Double-beam recording microdensitometer

1967-1975

Joyce-Loebel flying spot integrating microdensitometer, c.1960s.

Joyce-Loebel flying spot integrating microdensitometer

1960-1965

Joyce-Loebl microdensitometer on stand with recording electronics.

Joyce-Loebl microdensitometer

1970-1975

Power leads for microdensitometer used to measure the X-ray density of tree rings in research into past climates, 1978

Power leads for microdensitometer

1978

Electronic switch box for microdensitometer used to measure the X-ray density of tree rings in research into past climates, 1978

Electronic switch box for microdensitometer

1978

Printer loaded with roll of graph paper with experimental trace and plastic dust cover for microdensitometer used to measure the X-ray density of tree rings in research into past climates, 1978

Printer and paper for microdensitometer

1978

Electronics/switch box for microdensitometer used to measure the X-ray density of tree rings in research into past climates, 1978

Electronics/switch box for microdensitometer

1978

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