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Espec

EHS-222MD

Test & ProbeEspec EHS-222MD family
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The EHS-222MD is an Espec highly accelerated stress test system. The EHS-222MD has a two-stage chamber configuration. The EHS-222MD has an interior dimension of φ394×L426 mm.[1]

EspecEHS-222MD
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What it is

The Espec EHS-222MD is an environmental test chamber.[1]

How it works

The Espec product line includes bench-top temperature and humidity chambers with touch-panel control and selectable constant and program modes.[1]

Applications

Environmental test chambers are used for semiconductor and electronic device equipment testing.[1]

  • Moisture resistance evaluation
  • Semiconductor device testing
  • Non-hermetically sealed device testing

What do the numbers mean?

Vacuum & pumping1

Temperature / humidity / pressure range
+105.0℃ to +142.9℃ / 75%rh to 100%rh / 0.019 to 0.193 MPa (Gauge)[1]
Accurate?

Dimensions & facilities1

Interior dimensions
φ394×L426 mm[1]
Accurate?

Configuration & options3

Type
Highly accelerated stress test system (HAST chamber)[1]
Accurate?
Model
EHS-222MD[1]
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Chamber configuration
2-stage[1]
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Vintage & configurations

Documented models & variants

DesignationGenerationVintageChangesSource
EHS-222(M)——Single-stage version with the same φ394×L426 mm chamber size.espec.co.jp[1]
EHS-222MD——Two-stage version with φ394×L426 mm ×2stage chamber size.espec.co.jp[1]
EHS-222M-L——Single-stage version with a larger φ394×L626 mm chamber size.espec.co.jp[1]
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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.

  • Temperature / humidity / pressure range+105.0℃ to +142.9℃ / 75%rh to 100%rh / 0.019 to 0.193 MPa (Gauge)[1]

Where are the manuals?

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Not publicly documented

Field notes

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Frequently asked questions

What class of equipment is the EHS-222MD?

The EHS-222MD is an environmental test chamber.[1]

Not publicly documented

The following facts about the EHS-222MD 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 EHS-222MD are on record.

    Answerable by: OEM historical records or a trade-press announcement

  • The control-system platform and OS era of the EHS-222MD 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 EHS-222MD are on record.

    Answerable by: a field service engineer, process engineer, or maintenance technician

  • The process node or technology generation of the EHS-222MD is not on record.

    Answerable by: an OEM datasheet or a fab qualification report

  • No publicly documented compatible parts, consumables, or accessories for the EHS-222MD are on record.

    Answerable by: an OEM parts catalog or a service engineer

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Sources & citations

Sources (1)Every fact above is drawn from these public sources
  1. [1]espec.co.jp — espec.co.jpespec.co.jp
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Last updated Oct 9, 2026.

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