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Electric motor-drive; metal sector disc approx 260mm diameter; flap shutter; no light source.

Disc sensitometer

Disc sensitometer; electric driver sector wheel; no lamphouse; used in plate and film testing.

Disc sensitometer

Large sensitometer disc approx. 4" diameter; electric motor driven; in wooden housing. Lamphouse is 1990-5036/8611.

Sensitometer disc

Printing frame for 9x12 cm plate, containing continuous wedge with red, green, blue and yellow filter strips. In original carton with German instructions.

Herlango Eder-Hecht sensitometer

1922-1932

Opal glass screen, with plate with 24 graduated holes behind. 24 compartments; for 1/4 plates.

Spurge sensitometer

Warnerke sensitometer.

Warnerke Sensitometer

High speed sensitometer, designed by R.J. Hercock, c. 1945

High Speed Sensitometer

1945

Drum sensitometer

Drum sensitometer

Disc sensitometer

Disc Sensitometer

Wooden box with opal glass at one end; backed by perforated plate with holes of different sizes, box internally divided into squre compartments. Glass plate, 1/2 plate size with number sequence painted on in squares; 7, 8, 10, 11, 14, 16, 20, 23, 28, 32, 39, 45, 56, 64, 78, 90, 111, 128, 156. With manuscript instructions.

Spurge sensitometer

Sensitometer. Used at Harrow. Rotating sector wheel; filter box with flap shutter; light source missing.

Sensitometer

Darkslide containing step wedge with 21 steps. Phosphorescent plate made luminous by burning magnesium and placed in holder. Plated exposed through wedge under luminous plate for 30 seconds. No.79. L.Warnerke.

Warnerke's Standard Sensitometer

Variable aperture sensitometer, c. 1918

Variable Aperture Sensitometer

1918

Box containing Chapman Jones plate tester in darkslides. Exposure board with candle holder (folding candle shade missing) and candles. Sanger Shepherd and Co.

The Chapman Jones Plate Tester