Shanghai Youyi LHS-100CA Temperature and Humidity Controlled Environmental Test Chamber

Overview

The Shanghai Youyi LHS-100CA is a precision-engineered upright environmental test chamber designed for stable, long-term temperature and humidity control across demanding laboratory applications. Based on the principle of forced-air convection thermodynamics and resistive vapor generation, it delivers high reproducibility in maintaining setpoint conditions within defined tolerances—critical for stability testing, accelerated aging studies, biobanking, and material conditioning protocols. Its −10 °C to +80 °C operating range and 30–95 %RH capability support both low-temperature preservation (e.g., plasma, vaccines, cryopreserved cell lines) and elevated-humidity stress testing (e.g., polymer hygroscopicity, electronic component reliability). The chamber complies with foundational environmental test standards including IEC 60068-3-5 (humidity methods), ISO 17025–compliant operation environments, and supports GLP/GMP-aligned validation practices when paired with optional data logging interfaces.

Key Features

• Microprocessor-based PID dual-loop control system with programmable cycle logic: up to 99 cycles, each containing 30 user-defined segments (max 99 h 99 min per segment) for complex thermal-hygrometric profiles.
• Mirror-finish stainless steel interior with seamless semi-circular corner design—enhancing cleanability, corrosion resistance, and minimizing microbial retention points.
• Double-glazed insulated door assembly featuring tempered glass and silicone gasketing—ensuring minimal thermal leakage during observation without compromising internal uniformity.
• Energy-efficient air-cooled refrigeration using environmentally compliant refrigerants R134a and R406a; optimized heat exchanger geometry reduces compressor cycling and improves long-term reliability.
• Integrated humidity generation system comprising a stainless steel electric heating rod submerged in an accessible internal water reservoir—enabling rapid, stable RH ramping and recovery after door openings.
• High-accuracy capacitive humidity sensor (traceable calibration available) and platinum RTD temperature sensors—mounted per IEC 60068-3-5 spatial guidelines for representative chamber monitoring.
• Four-point adjustable stainless steel shelving system (2 standard, up to 4 optional); all trays feature non-slip perforated surfaces compatible with ISO-standard labware placement.

Sample Compatibility & Compliance

The LHS-100CA accommodates diverse sample formats—including vial racks, Petri dish stacks, PCB boards, polymer coupons, and sealed biological containers—within its 100 L working volume (450 × 380 × 590 mm). Its uniform airflow architecture ensures ≤±0.5 °C temperature deviation and ≤±3 %RH humidity deviation across the entire workspace under no-load conditions (per ASTM E2237 verification methodology). The chamber meets mechanical safety requirements per GB/T 2423.1 (cold testing) and GB/T 2423.3 (damp heat testing), and its construction materials comply with RoHS Directive 2011/65/EU. Optional accessories—including USB/RS485 communication modules, embedded thermal printers, and independent over-temperature cut-off units—enable compliance with FDA 21 CFR Part 11 audit trail requirements when integrated into validated QC workflows.

Software & Data Management

While the LHS-100CA operates autonomously via its onboard 5.7″ graphical interface, optional connectivity modules enable integration with external laboratory information management systems (LIMS) or centralized environmental monitoring platforms. The RS485/USB interface supports Modbus RTU protocol for real-time parameter streaming (setpoint, actual T/RH, alarm status, cycle stage), while time-stamped event logs—including door open/close events, power interruptions, and deviation alerts—are exportable as CSV files. When deployed with Shanghai Youyi’s optional dedicated software suite, users can generate IQ/OQ documentation templates aligned with ISO/IEC 17025 Annex A.2 and perform statistical process control (SPC) analysis on historical chamber performance data.

Applications

• Stability testing of pharmaceuticals and biologics per ICH Q1A(R2) guidelines (long-term, intermediate, and accelerated conditions).
• Cryopreservation support for blood banks and tissue repositories requiring controlled −10 °C holding prior to deep freezing.
• Material science investigations: moisture absorption kinetics of composites, thermal expansion coefficient determination under humidified conditions.
• Electronics reliability screening: damp heat storage per JEDEC JESD22-A101 and MIL-STD-810H Method 507.6.
• Microbiological incubation support for humidity-sensitive fungal cultures and mycobacterial growth media conditioning.
• Calibration reference environment for hygrometers and thermometers in metrology labs.

FAQ

What is the recommended validation frequency for this chamber?
Annual IQ/OQ/PQ validation is advised for GxP-regulated environments; semi-annual checks are sufficient for R&D use. Calibration certificates for temperature and humidity sensors are available upon request.
Can the chamber operate continuously at −10 °C and 95 %RH simultaneously?
Yes—the refrigeration and humidification subsystems are independently regulated and engineered for concurrent operation across the full specified range.
Is remote monitoring supported out of the box?
No—remote access requires optional RS485 or USB interface hardware and third-party SCADA or LIMS integration.
Does the unit include a water level indicator for the humidifier reservoir?
Yes—a visual float gauge and low-water auto-shutdown function prevent dry-heating damage.
Are custom shelving configurations available?
Yes—custom tray spacing, load-rated reinforced shelves, and anti-vibration mounts can be ordered as factory-installed options.