Accession No

4634

Brief Description

flame photometer, by Evans Electroselenium Ltd., English, 3rd quarter of the 20th Century

Origin

England; Essex; Halstead

Maker

Evans Electroselenium Ltd.

Class

laboratory apparatus

Earliest Date

1950

Latest Date

1975

Inscription Date

Material

metal (brass; at least five others); plastic (perspex; bakelite; synthetic rubber; at least two others); glass; paper (card); ceramic

Dimensions

length 375mm; breadth 235mm; height 342mm

Special Collection

Provenance

Donated on 25/07/1997.

Inscription

‘CORNING-EEL
SCIENTIFIC INSTRUMENTS
FLAME PHOTOMETER
MADE BY
EVANS ELECTROSELENIUM LTD.
HALSTEAD . ESSEX . ENGLAND
PAT. NO 712700. REG. DES. NO 866150’ (metal plate screwed to front of instrument)

Description Notes

Flame photometer in grey-painted metal case. Top section with metal grill and is hinged to allow access to the burner. Burner encased in black painted metal box with plano convex lens to focus the light. Holder in front of the lens for sodium and potassium filters. Electrical connection to light source which casts a spot on a screen at the front with scale divided 0 - 100 numbered by 20 graduated to 2. Dial on left hand side of fron for gas pressur in lb/in2 and atmospheres. Also a sensitivity adjustment knob. Knobs on right hand side for clamping the indicator and for setting zero. At the back of the right hand side are input tubes for air and gas. Wired with 3-pin plug.

Condition good; complete

References

Events