pyrometer; optical

Maker
Foster Instrument Co Ltd
Production date
1967
Description
Optical instrument which looks like a microscope in a black finish with a brown leather satchel case with strap.
This device was used to confirm readings from thermocouple pyrometers installed in kilns in Stein's refractory works at Castlecary. It works by sighting at the heat source; the adjusting knob is turned until the electrical element "disappears"; that is when the colour of the element is identical to that the heat source. Th scale is then read from the optical pyrometer.
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Department
Production date
1967
Signature & date
stamping:label:"FOSTER INSTRUMENTS CO LTD LETCHWORTH, HERTS, ENGLAND. OPTICAL PYROMETER PAT NO. 188.132 PATENTED ALSO ABROAD. TYPE NO. AJ 015/12/19.5 SERIAL NO. 87898 MADE IN ENGLAND"
Associated date
1967
Associated person
Associated notes
Used to confirm readings from thermocouple pyrometers installed in kilns. It works by sighting the lense at the heat source; the adjusting knob is turned until the electrical element "disappears"; that is when the colour of the element is identical to that of the heat source. The scale is then read on the optical pyrometer.
Measurement type, part and reading
Dimensions:case:L 31cm (L 1' 3/16")
Dimensions:case:H 19cm (H 7 1/2")
Dimensions:case:W 14cm (W 5 1/2")
Accession number
1997-010-001

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