The TestEQ EWTH-series walk-in environmental chamber provides a large test volume for bulky or heavy products and system-level test items. TestEQ builds walk-in rooms in modular-panel and fully welded constructions: because polyurethane panel insulation is limited to a maximum of 85 °C, a fully welded structure is used where a higher temperature range, faster temperature change rate or high-temperature high-humidity conditions are required.
Applications
- Telecommunications, defense and aerospace equipment
- Pharmaceutical, automotive and electronics industries
- EV battery packs and energy storage systems
- Large assemblies and system-level products
- Products that must be driven or operated while under test
Configuration and features
- Type A volumes from 7.8 m³ to 44.1 m³; Type B volumes from 6.8 m³ to 38.6 m³.
- Low-temperature grades A to F: A = +25 °C, B = 0 °C, C = -20 °C, D = -40 °C, E = -60 °C, F = -70 °C. High temperature 85 °C (350 °C optional).
- Humidity range 20 % to 98 % RH (5 % to 98 % RH is a special optional condition requiring a dehumidifier).
- Temperature uniformity ≤ ±2.0 °C; temperature fluctuation ≤ ±0.3 °C.
- Humidity fluctuation ±3 %RH; humidity deviation ≤ ±3 %RH (>75 %RH) and ≤ +5 %RH (≤75 %RH) at no load, constant state.
- Modular structure for custom room sizes; internal and external dimensions are customised.
- Chamber integrates refrigeration, heating, humidity generation, air circulation and PLC / AI control.
- Rooms can be engineered to a customer’s own requirements, including airtight doors, safety locks, observation windows, interior lighting, access doors, personnel access and load handling.
- Power AC380V, 3 phase 5 lines, 50/60 Hz.
- Large walk-in temperature-humidity systems can be customised up to 4500 m³.
Specifications
Model range
| Models (low-temperature grade) | Type A volume (m³) | Type B volume (m³) |
|---|---|---|
| EWTH7.8-20W / EWTH7.8-40W / EWTH7.8-65W | 7.8 | 6.8 |
| EWTH11.7-20W / EWTH11.7-40W / EWTH11.7-65W | 11.7 | 10.2 |
| EWTH15.6-20W / EWTH15.6-40W / EWTH15.6-65W | 15.6 | 13.6 |
| EWTH21.6-20W / EWTH21.6-40W / EWTH21.6-65W | 21.6 | 18.9 |
| EWTH29.4-20W / EWTH29.4-40W / EWTH29.4-65W | 29.4 | 25.7 |
| EWTH44.1-20W / EWTH44.1-40W / EWTH44.1-65W | 44.1 | 38.6 |
Common specifications
| Parameter | Value |
|---|---|
| Temperature range | low temperature grade A–F (-20 / -40 / -65 °C or as specified); high temperature +85 °C (350 °C optional) |
| Temperature uniformity | ≤ ±2.0 °C |
| Temperature fluctuation | ≤ ±0.3 °C |
| Humidity range | 20–98 %RH (5–98 %RH special optional condition, requires a dehumidifier) |
| Humidity fluctuation | ±3 %RH |
| Humidity deviation | ≤ ±3 %RH (>75 %RH); ≤ +5 %RH (≤75 %RH), no load, constant state |
| Interior / exterior dimensions | Customised |
| Power | AC380V, 3 phase 5 lines, 50/60 Hz |
Cooling and heating time by volume (no-load)
| Time (min) | 7.8 m³ | 11.7 m³ | 15.6 m³ | 21.6 m³ | 29.4 m³ | 44.1 m³ |
|---|---|---|---|---|---|---|
| Cooling 25 → -20 °C | 45 | 60 | 75 | 40 | 50 | 70 |
| Cooling 25 → -40 °C | 60 | 75 | 90 | 105 | 60 | 80 |
| Cooling 25 → -60 °C | 100 | 120 | 140 | 105 | 135 | 160 |
| Heating 25 → +85 °C | 45 | 50 | 55 | 50 | 60 | 80 |
Large walk-in systems built to order
TestEQ has delivered an ultra-large walk-in environmental system of 1600 m³ total effective volume, built from multi-module panels with a wide temperature range of -65 °C to +120 °C and humidity control from 20 % to 98 % RH (expandable). The system uses a PLC with industrial touch control, multi-channel data acquisition (temperature/humidity/pressure), remote monitoring and automatic test-curve recording.
Standards
Walk-in chambers are configured for the customer’s test program; TestEQ equipment is designed with reference to GB, GJB, IEC, ASTM and UL test standards, and project programs can reference IEC 60068, MIL-STD-810H, ISO 16750 and JESD22.
To size a walk-in room and confirm the construction type, contact us with the test item dimensions, weight, access requirements and required conditions. Related: Custom Non-standard Test Chamber , High and Low Temperature (Humidity) Test Chamber .