Brookfield BXG-400 Plant Growth Chamber
| Brand | Brookfield |
|---|---|
| Model | BXG-400 |
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Category | Domestic (China-made) |
| Temperature Range (dark) | 0–70°C |
| Temperature Range (with light) | 10–70°C |
| Temperature Resolution | 0.1°C |
| Temperature Uniformity (at 25°C) | ±1.5°C |
| Temperature Fluctuation (at 25°C) | ±0.5°C |
| Illumination Intensity | 0–30,000 lux (10-step adjustable) |
| Input Power (standard) | 1750 W |
| Input Power (with humidity control) | 2350 W |
| Chamber Internal Dimensions (L×W×H) | 600 × 640 × 1050 mm |
| External Dimensions (L×W×H) | 745 × 930 × 1695 mm |
| Standard Shelves | 2 pcs (max 7) |
| Standard Light Panels | 2 sets (max 3) |
| Data Storage Capacity | 250,000 records |
| Real-time Log Display | Last 1600 entries |
| Control System | Windows CE-based OS with high-frequency CPU & large-capacity RAM |
| Cooling System | Inverter-driven, imported energy-efficient compressor |
| Air Circulation | C.H. (Circulating Heat) thermal recovery system |
| Interface Ports | USB + RS485 |
| Security | Touchscreen password lock, mechanical door lock |
| Compliance Options | FDA 21 CFR Part 11–compliant software (optional), GMP-compliant monitoring package (optional) |
Overview
The Brookfield BXG-400 Plant Growth Chamber is a precision-engineered environmental control system designed for reproducible, long-term cultivation of photobiological specimens under tightly regulated temperature and illumination conditions. Built upon a dual-mode thermoregulatory architecture—combining inverter-controlled refrigeration and adaptive heating—the chamber maintains stable setpoints across its full operational range (0–70°C in darkness; 10–70°C under illumination). Its core measurement and control logic relies on fuzzy PID algorithms implemented via a Windows CE–based embedded operating system, enabling deterministic execution of up to 30 programmable segments over 99 cycles. Each segment supports independent configuration of temperature, light intensity (0–30,000 lux, 10-level stepwise adjustment), and duration (1–9999 hours), making it suitable for simulating diurnal cycles, vernalization protocols, or multi-phase germination studies. The chamber integrates a C.H. (Circulating Heat) thermal management system that recovers residual heat from cooling circuits to accelerate heating response—reducing thermal inertia and improving energy efficiency without compromising stability.
Key Features
- 4.3-inch TFT LCD touchscreen interface with 16-bit true-color display and intuitive touch navigation
- Fuzzy PID temperature control with 0.1°C resolution and ±0.5°C fluctuation (at 25°C); ±1.5°C uniformity across working volume
- Inverter-driven, imported high-efficiency compressor and low-noise centrifugal fan for rapid temperature recovery (<3 min after door opening)
- Integrated data logging: stores up to 250,000 timestamped entries (temperature, light status, alarms, parameter changes)
- Real-time access to the most recent 1600 log entries directly on screen; USB export of full dataset including event history (power-on/off, menu modifications, fault triggers)
- Multi-layer security: screen password lock, mechanical door latch, and configurable alarm escalation (over-temperature, door-open, sensor failure)
- Modular lighting system: two standard light panels (expandable to three), each independently controllable across ten irradiance levels
- Dual communication interfaces: isolated RS485 for industrial SCADA integration and USB host port for direct data retrieval and firmware updates
Sample Compatibility & Compliance
The BXG-400 accommodates a wide range of biological samples—from seed germination assays and seedling acclimatization to microbial culture maintenance and photomorphogenesis studies. Its internal chamber (600 × 640 × 1050 mm) provides ample vertical clearance for multi-tier shelving (2 standard shelves; expandable to 7) and optimized airflow distribution. Optional humidity control (30–95% RH, ±3% fluctuation) extends applicability to hygrosensitive species or co-culture experiments requiring coupled thermo-hygrometric regulation. For regulated environments, optional FDA 21 CFR Part 11–compliant software enables electronic signatures, audit trails, and role-based user access—fully supporting GLP and GMP workflows. All electrical and thermal safety designs comply with IEC 61010-1 and GB 4793.1 standards. UV sterilization module (254 nm germicidal lamp) and GPRS-based remote alerting (SMS notification on critical faults) are available as validated add-ons.
Software & Data Management
The embedded Windows CE platform hosts a deterministic real-time control kernel with non-volatile memory allocation for persistent parameter storage and event logging. Logged data include timestamped temperature readings, light activation states, user-initiated configuration changes, and system fault codes—all traceable to millisecond-level accuracy. USB exports generate CSV-formatted files compatible with Excel, MATLAB, or LIMS platforms. Optional PC-based monitoring software offers live graphing, multi-chamber synchronization, and automated report generation compliant with ISO/IEC 17025 documentation requirements. The FDA Edition includes full electronic record integrity controls: immutable audit trail, user authentication logs, and electronic signature capture per 21 CFR Part 11 Subpart B. GMP Edition adds batch-specific metadata tagging, deviation tracking, and preconfigured SOP templates aligned with Annex 11 guidance.
Applications
- Controlled-environment plant phenotyping: quantifying growth responses to spectral quality, photoperiod, and thermal gradients
- Seed viability and dormancy studies under standardized light–temperature regimes (ASTM D5517, ISO 11260)
- Microbial preservation and subculturing where light exposure must be excluded or precisely modulated
- Algal biomass production optimization using tunable PAR (Photosynthetically Active Radiation) delivery
- Pre-clinical botanical extract stability testing under ICH Q1B photo-stability conditions
- Educational labs requiring robust, serviceable hardware with transparent operational logic and full data traceability
FAQ
What is the maximum number of programmable temperature–light cycles supported?
The BXG-400 supports up to 30 independent segments across 99 repeating cycles, with each segment configurable for duration (1–9999 h), target temperature, and light intensity level.
Can the chamber operate without illumination while maintaining sub-ambient temperatures?
Yes—the dark-mode temperature range extends from 0°C to 70°C, enabled by the inverter-driven refrigeration system and insulated double-glass observation door.
Is humidity control factory-integrated or retrofittable?
Humidity functionality is an optional upgrade requiring installation of the dedicated humidity control module, steam generator, and RH sensor—performed during manufacturing or at authorized service centers.
Does the USB data export include timestamps for all logged events?
Yes—every recorded entry (temperature reading, alarm trigger, parameter change, power event) contains a precise UTC timestamp accurate to ±1 second.
Are calibration certificates available for temperature and light sensors?
NIST-traceable calibration reports (temperature: ±0.2°C uncertainty; light: ±3% irradiance uncertainty) are provided upon request and may be included in IQ/OQ documentation packages.
