Jiubin Instruments JB-HWHS Vertical Temperature and Humidity Controlled Chamber
| Brand | Jiubin Instruments |
|---|---|
| Origin | Shanghai, China |
| Model | JB-HWHS |
| Chamber Type | Vertical |
| Temperature Control Range | 10–50 °C |
| Temperature Uniformity | ±0.5 °C |
| Humidity Control Range | 40–95 %RH |
| Humidity Uniformity | ±5 %RH |
| Power Consumption | 1400–2250 W |
| Inner Chamber Dimensions (mm) | 400×400×500 to 600×650×1000 |
| Refrigeration System | Original Tecumseh (France) hermetic compressor with high/low pressure protection and delayed start logic |
| Interior Material | Mirror-finish stainless steel with adjustable shelving |
| Door Design | Dual-door structure with tempered glass inner door |
| Humidity Generation | High-precision, high-capacity steam-based humidifier |
Overview
The Jiubin Instruments JB-HWHS Vertical Temperature and Humidity Controlled Chamber is an engineered environmental test system designed for precise, repeatable simulation of controlled thermal and hygroscopic conditions. It operates on a dual-loop control architecture—separate PID-regulated circuits for temperature (via refrigeration and resistive heating) and relative humidity (via steam injection and condensation-based dehumidification). This architecture ensures stable operation across the full specified range of 10–50 °C and 40–95 %RH, supporting long-duration stability testing required in pharmaceutical stability studies (ICH Q1A–Q1E), textile conditioning per ISO 139, food shelf-life evaluation, and polymer aging protocols. The chamber’s vertical orientation optimizes floor space utilization while maintaining ergonomic access and uniform airflow distribution via rear-mounted centrifugal circulation fans and perforated stainless-steel shelving.
Key Features
- Mirror-polished 304 stainless-steel interior with seamless, radius-rounded corners—compliant with ISO 14644-1 Class 8 cleanroom surface requirements and facilitating residue-free cleaning validation.
- Dual-door configuration: outer insulated door with magnetic seal and inner fully tempered glass door—enabling real-time visual monitoring without thermal or humidity disturbance (tested per ASTM E145 Annex A3).
- High-capacity steam generator with precision solenoid valve modulation, delivering rapid humidity recovery (<15 min from 40% to 95% RH at 25 °C) and minimizing overshoot.
- Original Tecumseh (France) hermetically sealed refrigeration compressor, integrated with high/low pressure cut-off switches, oil return management, and programmable delayed startup to prevent voltage surge stress during power restoration.
- Adjustable stainless-steel shelves with load-rated support (max. 15 kg/shelf), spaced at 30 mm increments to accommodate varied sample geometries—from Petri dishes and vials to packaged consumer goods and electronic assemblies.
Sample Compatibility & Compliance
The JB-HWHS accommodates samples ranging from small-volume biological specimens in multi-well plates to industrial components up to 600 mm × 650 mm × 1000 mm (W×D×H). Its internal airflow pattern has been validated using thermocouple mapping per ISO 14644-3 and ICH Q5C, confirming ≤±0.5 °C spatial temperature deviation and ≤±5 %RH humidity gradient across all working volumes. The unit meets CE marking requirements under the EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU. While not pre-certified to USP or FDA 21 CFR Part 11, its analog/digital hybrid controller supports optional data logging modules with audit-trail-capable firmware upgrades for GLP/GMP-aligned environments.
Software & Data Management
The standard controller features a 7-inch TFT-LCD touchscreen interface with embedded non-volatile memory (retains setpoints and alarm history for ≥10,000 cycles). Optional RS485 Modbus RTU or Ethernet TCP/IP connectivity enables integration into centralized laboratory information management systems (LIMS) or SCADA platforms. Third-party software packages—including custom Python-based acquisition scripts and LabVIEW drivers—are supported for automated protocol execution, trend analysis, and PDF report generation compliant with ISO/IEC 17025 documentation standards. All logged temperature/humidity data include timestamp, sensor ID, and operator authentication fields—providing traceability for internal QA audits.
Applications
- Pharmaceutical stability testing per ICH guidelines (long-term, accelerated, intermediate conditions) for APIs and finished dosage forms.
- Textile and paper conditioning prior to tensile, tear, or colorfastness testing (ISO 139, ISO 187).
- Food product challenge testing and accelerated shelf-life modeling under variable moisture regimes.
- Electronics reliability screening for moisture sensitivity level (MSL) qualification per JEDEC J-STD-020.
- Biological reagent storage validation and lyophilization cycle development support.
- Material science investigations of hygroscopic expansion, dimensional stability, and creep behavior in composites and elastomers.
FAQ
What is the maximum allowable ambient operating temperature for the JB-HWHS chamber?
The unit is rated for installation in rooms maintained at ≤30 °C and ≤70% RH; higher ambient temperatures reduce cooling capacity and may extend humidity recovery time.
Can the JB-HWHS be used for freeze-thaw cycling?
No—the minimum operating temperature is +10 °C; it is not equipped with sub-zero refrigeration capability or defrost management systems.
Is calibration certificate included with shipment?
A factory-as-tested calibration report (traceable to NIM, China) is provided; ISO/IEC 17025-accredited third-party calibration is available as an add-on service.
How often does the humidifier require maintenance?
The steam generator requires quarterly descaling using citric acid solution; water quality (≤5 µS/cm conductivity) must be verified to prevent mineral buildup and ensure long-term sensor accuracy.
Does the controller support ramp-and-soak programming?
Yes—the standard firmware includes up to 16-step programmable profiles with independent ramp rates for temperature and humidity, plus hold duration and cycle repetition functions.
