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ESPEC

BTX-475

ESPEC BTX-475 family
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Provisional entry — research in progress

This page was generated automatically from cited public sources and hasn't completed the full research pass yet. Every specification shown carries its source; more detail is added as research completes.

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]

ESPECBTX-475
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What it is

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]

How it works

The BTX-475 uses a touch-screen controller with Ethernet, and the standard controller is a Watlow F4T. The chamber supports saved profiles with ramp, soak, jump, auto-start, and end steps, and it includes relay outputs for external device control and specimen power interlock safety.[1][5]

What do the numbers mean?

Power & electrical1

Power Requirement
208/230 V, 1ph, 60 Hz, 20 service amps (NEMA 6-20 plug)[1]
Accurate?

Performance2

Temperature Gradient (Uniformity)
±1.5 °C (below 100 °C, empty)[1]
Accurate?
Humidity Gradient (Uniformity)
±5% (empty)[1]
Accurate?

Control & software2

Temperature Fluctuation
±0.5 °C (at control sensor)[1]
Accurate?
Humidity Fluctuation
±5% (at control sensor)[1]
Accurate?

Dimensions & facilities3

Interior Dimensions (W x D x H)
19.6" x 15" x 23.6" (500 x 380 x 600 mm)[1]
Accurate?
Exterior Dimensions (W x D x H)
30.25" x 33.5" x 46" (770 x 850 x 1170 mm)[1]
Accurate?
Weight
Approx. 500 lbs (227 kg)[4]
Accurate?

Configuration & options6

Documentation
Datasheet (1 document)[3]
Accurate?
Interior Volume
4 cu. ft. (110 L)[1]
Accurate?
Temperature Range
-70 to 180 °C (-94 to 354 °F)[1]
Accurate?
Humidity Range
10% - 95% RH[1]
Accurate?
Average Heating Rate
2.75 °C/min (empty, per IEC 60068 3-5, at supply sensor)[1]
Accurate?
Average Cooling Rate
2.5 °C/min (empty, per IEC 60068 3-5, at supply sensor)[1]
Accurate?
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What does it need to run?

Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.

  • Power Requirement208/230 V, 1ph, 60 Hz, 20 service amps (NEMA 6-20 plug)[1]

Where are the manuals?

Generated from public-source data on file. Enter your email to access — nothing is published; details are routed privately.

Not publicly documented

Field notes

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Frequently asked questions

What type of chamber is the BTX-475?

The BTX-475 is a benchtop humidity chamber.[1][6][4]

What is the chamber volume?

The BTX-475 has an interior volume of 4 cubic feet, or 110 liters.[1][5]

What controller is standard on the BTX-475?

The BTX-475 uses a Watlow F4T touch-screen controller with Ethernet as standard.[1][5][4]

Not publicly documented

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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Sources & citations

Sources (6)Every fact above is drawn from these public sources
  1. [1]espec.com — espec.comespec.com
  2. [2]https://ntrs.nasa.gov/api/citations/20170006479/downloads/20170006479.pdf — ntrs.nasa.govntrs.nasa.gov
  3. [3]metrologymanuals.com — metrologymanuals.commetrologymanuals.com
  4. [4]frankbacon.com — frankbacon.comfrankbacon.com
  5. [5]BTX-475 | Products | ESPEC North America — espec.comespec.com
  6. [6]Rent Espec BTX-475 Temperature and Humidity Chamber — atecorp.comatecorp.com
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Last updated Oct 9, 2026.

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