ESPEC
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The ESPEC BTX-475 is a benchtop temperature and humidity chamber with a temperature range of -70 to 180°C and a humidity range of 10% to 95% RH. The BTX-475 provides a 4-cubic-foot (110-liter) interior workspace for environmental testing. The BTX-475 has been employed in interferometric setups for measuring thermal expansion and refractive index of optical materials.[1][2]
The ESPEC BTX-475 is a benchtop environmental chamber for temperature and humidity testing. The model is part of ESPEC's Criterion Benchtop line.[1][5]
The BTX-475 has an interior volume of 4 cu. ft. or 110 liters. The chamber is specified with interior dimensions of 19.6 inches by 15 inches by 23.6 inches and exterior dimensions of 30.25 inches by 33.5 inches by 46 inches.[1][5]
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The following facts about the BTX-475 are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the BTX-475 are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the BTX-475 are on record.
Answerable by: an OEM product catalog or an engineer who ordered or specified the tool
The control-system platform and OS era of the BTX-475 are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the BTX-475 are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the BTX-475 is not on record.
Answerable by: an OEM datasheet or a fab qualification report
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Last updated Oct 9, 2026.