Yoyi LHS-100HC Temperature and Humidity Controlled Chamber

Overview

The Yoyi LHS-100HC is a precision-engineered upright temperature and humidity controlled chamber designed for stable, repeatable environmental simulation in laboratory and industrial quality assurance settings. Based on forced-air convection with optimized airflow distribution, the chamber maintains defined thermal and hygroscopic conditions via dual-loop microprocessor PID control—separately regulating heating, refrigeration (using R134a/R406a eco-friendly refrigerants), and steam-based humidification. Its operational envelope (0–60 °C / 40–95 %RH) meets the functional requirements of accelerated stability testing, material aging evaluation, microbiological incubation, and product validation under ICH Q1, ISO 14644, and ASTM E145-22 environmental test protocols. The chamber’s structural integrity—including double-glazed insulated door, mirror-finish stainless steel interior with radius-corner welds, and vibration-dampened base—ensures long-term calibration stability and compliance with GLP documentation practices.

Key Features

• Microprocessor-based dual-channel PID controller with 99 programmable cycles (30 segments per cycle; max segment duration: 99 h 99 min), supporting complex multi-step environmental profiles.
• High-accuracy humidity control system featuring a proprietary immersion-heated water reservoir and calibrated capacitive humidity sensor (traceable to NIST standards), delivering ±3 %RH deviation across 40–95 %RH range.
• Uniform air circulation architecture: forward-curved centrifugal blower + symmetrical ducted wind path ensures ≤±1 °C temperature uniformity (measured at 9-point grid per GB/T 2424.6-2006).
• Energy-efficient refrigeration circuit using ozone-safe R134a and R406a blends; compressor protection logic prevents short-cycling and extends service life.
• Modular interior design: two adjustable stainless steel shelves (load capacity: 15 kg per shelf); fully accessible chamber volume (100 L net) with 450×380×590 mm usable workspace.
• Ergonomic mobility system: four swivel casters (two with mechanical locking brakes) plus independent leveling feet for precise horizontal alignment on uneven floors.

Sample Compatibility & Compliance

The LHS-100HC accommodates standard laboratory sample formats including Petri dishes, vials, trays, and sealed containers up to 300 mm height. Its stainless steel interior (AISI 304, electrolytically passivated) resists corrosion from repeated exposure to high-humidity saline or organic solvent vapors. The chamber complies with national and international performance verification standards, including GB/T 10586–2006 (Technical Requirements for Damp Heat Test Chambers), GB/T 2424.6–2006 (Performance Assessment of Temperature/Humidity Chambers), and GJB/J 3827–1999 (Calibration Procedures for Standard Constant-Temperature/Humidity Chambers). Optional RS485 interface enables integration into centralized lab monitoring systems compliant with FDA 21 CFR Part 11 for electronic record integrity.

Software & Data Management

While the standard configuration uses an embedded LCD controller with real-time display of setpoints, actual values, and elapsed time, optional RS485 communication (with included PC software) supports automated data logging at user-defined intervals (1–300 s), CSV export, trend visualization, and alarm history archiving. All logged parameters—including temperature, humidity, cycle phase, and fault codes—are timestamped and stored with audit-trail metadata, satisfying GLP/GMP traceability requirements. Firmware updates are performed via USB port without hardware modification. No cloud dependency: all data remains on-site unless explicitly exported by authorized personnel.

Applications

• Pharmaceutical stability studies (ICH Q1A–Q1E), including long-term, accelerated, and intermediate condition testing.
• Biological incubation of cell cultures, fungi, and bacterial strains under controlled hygrometric stress.
• Material degradation analysis for polymers, adhesives, coatings, and elastomers per ASTM D3045 and ISO 4892-2.
• Electronics reliability screening: moisture sensitivity level (MSL) preconditioning and solder paste storage validation.
• Food packaging permeability assessment and shelf-life modeling under variable RH conditions.
• Textile conditioning per ISO 139 and ASTM D1776 for tensile strength and dimensional stability testing.

FAQ

What is the maximum ambient temperature at which the LHS-100HC maintains specified performance?
Rated performance (±1 °C/±3 %RH) is guaranteed when installed in environments ≤30 °C and ≤75 %RH, with adequate ventilation clearance (≥100 mm rear/side, ≥300 mm top).
Can the chamber operate continuously at 60 °C and 95 %RH simultaneously?
Yes—full-range concurrent operation is supported; however, sustained operation at upper limits may reduce compressor lifespan and requires periodic desiccant maintenance of the humidifier reservoir.
Is third-party calibration certification available?
Factory calibration reports (traceable to CNAS-accredited labs) are provided with each unit; optional on-site IQ/OQ protocol execution and ISO/IEC 17025-compliant calibration certificates can be arranged pre-shipment.
Does the controller support password-protected parameter locking?
Yes—the PID interface includes three-tier access control (operator, technician, administrator) with configurable password length and lockout after five failed attempts.
What safety protections are built into the system?
Overtemperature cutoff (independent mechanical limiter), compressor high-pressure shutdown, humidity sensor failure detection, door-open alarm with automatic heater deactivation, and ground-fault circuit interruption (GFCI) on power input.