Walk-in constant temperature and humidity test room is specially suitable for whole machine and large parts to do low temperature test, high temperature test, high and low temperature change test, constant temperature and humidity test, high temperature and low temperature test with humidity change test and so on.

The KR‑304A walk‑in temperature‑humidity test room is a large‑volume modular environmental simulation facility, purpose‑built for full‑size finished goods, oversized assemblies and high‑volume batch specimen evaluation. It reproduces high‑temperature, low‑temperature, constant damp‑heat and alternating hot‑humid climatic stresses in one integrated unit.
This custom‑configurable walk‑in‑style test environment enables operators to directly enter the working space to arrange large‑size test articles. It is widely adopted by automotive component factories, aerospace‑related enterprises, new‑energy industries, electronics manufacturers and accredited testing institutes for product reliability validation, accelerated ageing screening and compliance certification testing according to national and military environmental‑test standards.


| Parameter Item | KR‑304A Standard Specification |
|---|---|
| Inner Chamber Dimension | Fully customisable (reference base: W1000×H1000×D2000 mm) |
| Working Temperature Scope | ‑40 ℃ ~ +80 ℃ (extended range‑35 ℃ ~ +115 ℃ optional) |
| Humidity Control Range | 20 %RH ~ 95 %RH |
| Temperature Fluctuation / Deviation | ≤±0.5 ℃ / ≤±2.0 ℃ |
| Humidity Fluctuation | ≤±3 %RH (>75 %RH); ≤±5 %RH (≤75 %RH) |
| Average Heating Rate | 1.5‑2 ℃/min (no‑load, non‑linear) |
| Average Cooling Rate | 0.7‑1.0 ℃/min (no‑load, non‑linear) |
| Floor Uniform Bearing Capacity | 200 kg/m² |
| Refrigerant | R404A environment‑friendly refrigerant |
| Refrigeration Mode | Water‑cooled, dual‑stage compressor system |
| Controller | Imported colour TFT touch‑screen HMI |
| Standard Accessories | Anti‑condensation viewing window, Φ50 mm test port, internal anti‑damp lamp, wet‑dry bulb gauze set |
| Input Power Supply | Single‑phase AC220V / Three‑phase AC380V 50 Hz (depends on chamber volume) |
Compliance Standards: GB/T2423.1, GB/T2423.2, GB/T2423.3, GB/T2423.4, GJB150.3, GJB150.4, GJB150.9
Graph of temperature and humidity control


Environmental reliability assessment for large auto assemblies, interior‑exterior trim parts and vehicle electronic modules; high‑low‑temperature and damp‑heat ageing validation for complete‑vehicle subsystems.
Military‑standard climatic simulation for large‑size aviation components, structural‑parts and on‑board equipment.
Batch environmental screening for battery‑pack assemblies, large‑scale electrical cabinets and industrial control hardware.
Climatic ageing research for oversized polymer test‑pieces; evaluate material property shift under combined temperature‑humidity stress.
Conduct large‑specimen walk‑in‑chamber environmental‑reliability assessment and generate formal inspection‑documents for product‑qualification‑audits.

Optional spare‑parts & custom‑options: custom‑size test‑cable ports, enhanced cooling‑heating rate upgrade, PC remote‑monitoring software, overseas‑target‑voltage adaptation, additional internal sample‑support frames.
We provide remote‑one‑on‑one operational guidance covering multi‑segment‑program‑editing, refrigeration‑system routine‑care, fault‑alarm diagnosis and chamber‑seal maintenance. Spare‑parts stock includes door‑seal gaskets, filter‑cartridges and sensor‑accessories. Bulk‑order customers can apply for custom‑power‑supply‑voltage variants for overseas‑market deployment. Regional‑exclusive‑agent privileges contain priority‑production‑scheduling, OEM private‑branding‑services and complete‑set high‑definition product‑marketing‑image‑resources.
KR‑304A Walk‑In Temperature‑Humidity Test Room | GB‑GJB‑Compliant Large‑Size‑Assembly‑Batch‑Specimen‑Climatic‑Reliability‑QC‑Testing‑Instrument
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Never open main access‑doors when chamber is running under extreme high / low‑temperature conditions to avoid scald or frost‑bite hazard. Reliable three‑phase power‑grounding must be completed before power‑on. Operators shall follow safety protocols when entering the inner test‑space. Periodically inspect door‑gasket sealing performance and refrigeration‑system working‑condition.
KAREY products are trusted by customers across more than 100 countries, supporting long-term business growth in the testing equipment industry.
We are now seeking reliable partners to represent our brand in their local markets.
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