DRETOP ZGC-150-II Plant Growth Chamber

Overview

The DRETOP ZGC-150-II Plant Growth Chamber is a precision-engineered environmental control system designed for reproducible, long-term plant physiology studies, photobiological assays, and microbial culture under controlled light and thermal conditions. Built upon the Couette-flow-inspired air circulation architecture and dual-side fluorescent illumination geometry, it delivers stable thermal gradients and uniform photon flux distribution across the entire growth volume. Unlike generic incubators, this chamber integrates photoperiodic programming with thermally decoupled illumination circuits—enabling independent regulation of temperature and irradiance to emulate diurnal cycles critical for circadian rhythm research, seed germination trials, and photosynthetic efficiency quantification. Its microprocessor-controlled environment complies with fundamental requirements for GLP-compliant botanical experimentation and supports ISO 554 (standard atmospheres) and ASTM E1822 (standard practice for plant growth chamber operation) reference conditions.

Key Features

• Dual-side fluorescent illumination system with six discrete intensity levels (0–9000 lx), calibrated against NIST-traceable photometric standards;
• 30-segment programmable controller supporting simultaneous scheduling of temperature setpoints and light-on/light-off timing across multiple daily phases;
• Stainless steel interior chamber (304 grade) with fully removable, autoclavable shelves and seamless corner radii to eliminate microbial retention zones;
• Double-glazed observation window with magnetic door seal and low-emissivity inner glass to minimize radiant heat loss and condensation;
• Nichrome heating elements paired with hermetically sealed R134a-free refrigeration module (HFC-152a), meeting EU F-Gas Regulation (EU) No 517/2014;
• EC-type axial fan with optimized baffle-guided airflow path ensures ≥92% volumetric air exchange per minute and ±1.5°C spatial uniformity at 25°C setpoint;
• Power-fail recovery logic retains all active programs and sensor logs; automatic restart resumes from last valid state without manual reinitialization.

Sample Compatibility & Compliance

The ZGC-150-II accommodates standard Petri dishes (up to 150 mm), multi-well plates (6–96-well), hydroponic trays (max. 400 × 300 mm footprint), and potted seedlings up to 35 cm in height. Its internal geometry permits unobstructed access for handheld spectroradiometers (e.g., Apogee MQ-510) and IR thermography during live monitoring. The chamber meets mechanical safety requirements per IEC 61010-1:2010 and electromagnetic compatibility per EN 61326-1:2013. While humidity control is not integrated (requiring external humidifier integration via optional RS485 interface), its sealed construction maintains ambient RH stability within ±5% when operated in climate-controlled laboratories compliant with ISO 14644-1 Class 8 cleanroom specifications.

Software & Data Management

The embedded controller supports real-time data logging at user-defined intervals (1 s to 60 min resolution) to internal non-volatile memory (≥100,000 records). Optional RS485 Modbus RTU output enables direct integration with LabVIEW, MATLAB, or SCADA systems for centralized environmental monitoring. All logged parameters—including chamber temperature, illuminance, compressor duty cycle, and door-open events—are time-stamped with UTC synchronization and exportable as CSV files. Audit trail functionality satisfies FDA 21 CFR Part 11 requirements when used with third-party validated software platforms (e.g., DeltaV or PI System), including electronic signature capture and immutable record retention.

Applications

• Photomorphogenesis studies on Arabidopsis thaliana, rice, and Brassica species under defined PAR (Photosynthetically Active Radiation) regimes;
• BOD₅ incubation per APHA Standard Methods 5210B, where consistent 20°C dark-phase conditioning is required;
• Fungal colony development assays (e.g., Aspergillus niger, Fusarium oxysporum) under alternating light/dark stress protocols;
• Pre-germination stratification of temperate woody species requiring vernalization + photoperiod priming;
• Validation of LED-based horticultural lighting systems via comparative spectral response profiling using reference photodiodes;
• Teaching laboratory modules on plant hormone signaling (e.g., auxin transport inhibition under blue-light exposure).

FAQ

Does the ZGC-150-II support custom spectral output beyond cool white fluorescence?
Yes—DRETOP offers factory-installed red (660 nm peak) and blue (450 nm peak) lamp modules as optional upgrades, enabling targeted phytochrome and cryptochrome activation studies.
Is humidity control available as a built-in feature?
No—humidity is not regulated internally. Users requiring precise RH control must integrate an external humidifier/dehumidifier via the optional 1/4″ NPT port and RS485 feedback loop.
Can the chamber operate continuously for extended periods (e.g., >30 days)?
Yes—the compressor employs start-delay protection (≥3 min), thermal overload cutoff, and oil-return optimization for uninterrupted operation at 25°C/5000 lx for ≥720 hours without maintenance.
What validation documentation is provided with shipment?
Each unit ships with a Factory Calibration Certificate (traceable to CNAS-accredited labs), IQ/OQ checklist templates, and a CE Declaration of Conformity covering EMC and LVD directives.
Is remote monitoring supported out-of-the-box?
Not natively—but the RS485 interface (optional accessory) enables integration with industrial IoT gateways for cloud-based telemetry via MQTT or HTTP(S) APIs.