English Product Name
| Origin | Zhejiang, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | GPX-250 |
| Price | USD 1,380 (FOB) |
| Capacity | 250 L |
| Power Supply | AC 220 V ±10%, 50 Hz ±2% |
| Temperature Control Range | 10–50 °C (with full illumination), 5–50 °C (dark mode) |
| Temperature Accuracy | ±1 °C (LED digital display) |
| Temperature Uniformity | ±1 °C |
| Illuminance | ≥5000 lx |
| Operating Ambient Temperature | 0–40 °C |
| Operating Ambient Relative Humidity | ≤85% RH |
Overview
The Macono GPX-250 Digital Display Plant Growth Chamber is a precision-engineered environmental control system designed for reproducible simulation of photoperiodic and thermoregulated conditions essential in plant physiology, seed germination, photobiology, and microbial culture studies. It operates on a dual-mode temperature regulation principle—combining Peltier-assisted or compressor-based cooling with resistive heating—to maintain stable setpoints across defined light/dark cycles. Unlike basic incubators, the GPX-250 integrates calibrated broadband illumination (≥5000 lx at working height) with uniform air distribution architecture, enabling controlled photomorphogenic experiments compliant with ISO 17025-accredited laboratory practices. Its microprocessor-controlled thermal management system supports both continuous and programmable temperature profiles, making it suitable for long-term BOD testing, circadian rhythm assays, and standardized growth trials per ASTM E1980 and OECD 208 guidelines.
Key Features
- Microprocessor-based PID temperature controller with LED digital display—ensuring real-time visibility and ±1 °C accuracy under steady-state conditions.
- Double-layer tempered glass observation door with argon-filled insulating gap, minimizing thermal leakage while permitting non-invasive visual monitoring.
- Dual-side hinged access doors for rapid lamp replacement—compatible with standard T8/T5 fluorescent or energy-efficient LED grow tubes (not included).
- High-density polyurethane foam insulation (≥50 mm thickness) applied to all six chamber walls, achieving low thermal conductivity (<0.022 W/m·K) and reduced energy consumption.
- Asymmetric forced-air convection system with rear-mounted centrifugal blower and perforated baffle plate—engineered to suppress vertical thermal stratification and ensure ±1 °C uniformity across the 250 L working volume.
- Compressor protection circuitry featuring automatic delay-on-restart (≥3 min) and voltage fluctuation compensation—extending service life under variable grid conditions.
- Electrogalvanized carbon steel outer casing with epoxy-polyester powder coating; 304 stainless steel interior chamber—resistant to corrosion from repeated sterilization and humidity exposure.
Sample Compatibility & Compliance
The GPX-250 accommodates standard-sized plant trays (up to 450 × 450 mm), multi-well plates, petri dishes, and Erlenmeyer flasks up to 1 L capacity. Its internal dimensions (520 × 480 × 1020 mm W×D×H) support modular shelving (3 adjustable stainless steel shelves included). The chamber meets IEC 61000-4 electromagnetic compatibility standards and complies with GB/T 13950–2021 (Chinese national standard for environmental test chambers). While not certified for GMP or FDA 21 CFR Part 11 out-of-the-box, its logging-capable controller can be validated for GLP-aligned workflows when paired with external data acquisition systems.
Software & Data Management
The onboard controller supports manual setpoint entry and time-based schedule programming (up to 8 segments per day). Data logging is limited to local LED display only; however, optional RS-485 Modbus RTU interface (available as accessory kit) enables integration with SCADA platforms or LabVIEW-based monitoring systems. For audit-ready documentation, users may connect an external USB data logger (e.g., HOBO UX100 series) to record temperature and illuminance trends over extended periods—supporting traceability requirements under ISO/IEC 17025 Clause 7.7.
Applications
- Seed germination assays under standardized light intensity and spectral quality (per ISTA Rules Section 5).
- Photoperiod-controlled cultivation of Arabidopsis thaliana, rice, maize, and other model or crop species.
- Biochemical oxygen demand (BOD5) incubation at 20 ±1 °C per APHA Standard Methods 5210B.
- Long-term stability testing of biological reagents under accelerated aging protocols (ICH Q1A).
- Mycological culture maintenance requiring diurnal temperature cycling (e.g., 25 °C day / 18 °C night).
- Educational demonstrations of phototropism, etiolation, and vernalization responses in undergraduate botany labs.
FAQ
Does the GPX-250 support programmable light/dark cycles?
No—the lighting system is manually switched and lacks integrated timer or dimming functionality. External programmable timers or smart relays are required for automated photoperiod control.
Is humidity control available?
No—this model provides only temperature and illumination regulation. Humidity management requires supplemental equipment (e.g., desiccant packs, humidifiers, or separate RH-controlled chambers).
What is the warranty coverage period?
Macono provides a 12-month limited warranty covering material and workmanship defects under normal laboratory use. Exclusions include damage from improper voltage supply, condensation ingress, or unauthorized modifications.
Can the chamber operate continuously at 50 °C under full illumination?
Yes—thermal design validation confirms stable operation at maximum setpoints for ≥72 hours, provided ambient temperature remains ≤35 °C and ventilation clearance ≥10 cm is maintained on all sides.
Are calibration certificates included?
Factory calibration reports (temperature uniformity and illuminance verification) are supplied with each unit. NIST-traceable third-party calibration is available upon request at additional cost.
