Dual-Fifteen Desiccation Chamber – Top Cloud-agri Model TC-DC1515
| Brand | Top Cloud-agri |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | TC-DC1515 |
| Pricing | Available Upon Request |
Overview
The Dual-Fifteen Desiccation Chamber (Model TC-DC1515) is a precision-engineered environmental conditioning system designed specifically for pre-storage seed processing in germplasm conservation workflows. It operates on the principle of controlled low-temperature desiccation—maintaining a stable thermal and hygrometric environment to reduce seed moisture content without inducing physiological stress or metabolic activation. Unlike conventional drying cabinets or ambient desiccators, this chamber integrates active refrigerated dehumidification with closed-loop PID-regulated temperature control, enabling reproducible equilibration of orthodox seeds toward target moisture levels recommended by international seed banking standards (e.g., FAO/IBPGR Guidelines, CGC Technical Bulletin No. 20). Its primary operational envelope—15 ± 1 °C and ≤15 ± 5 % RH—is optimized for the safe, slow-drying phase prior to cryogenic or long-term cold storage, minimizing membrane damage and preserving germination viability over decades.
Key Features
- Stable dual-parameter control: Independent regulation of temperature (15 ± 1 °C) and relative humidity (≤15 ± 5 % RH) via integrated refrigerant-based dehumidifier and high-accuracy PT100 sensor array.
- PLC-based automation platform: Programmable logic controller with real-time monitoring, event logging, and user-configurable setpoint profiles—supports GLP-compliant operation through audit-trail-enabled firmware.
- Insulated chamber architecture: 80 mm thick polyurethane foam insulation with vapor barrier lining ensures thermal stability and minimizes external humidity infiltration during extended operation.
- Uniform air distribution: Horizontal laminar airflow design with low-turbulence recirculation prevents localized microclimates and ensures consistent drying kinetics across multi-tier sample racks.
- Fail-safe redundancy: Dual independent temperature and humidity sensors with automatic alarm triggers (audible/visual) and configurable shutdown protocols upon deviation beyond ±2 °C or ±8 % RH thresholds.
Sample Compatibility & Compliance
The TC-DC1515 accommodates standard seed storage containers—including aluminum foil packets, glass vials, and breathable paper envelopes—on adjustable stainless-steel shelving (max. load: 30 kg per shelf). It is validated for use with orthodox seeds of cereals, legumes, medicinal plants (e.g., Artemisia annua, Salvia miltiorrhiza), and horticultural species requiring strict pre-cold-storage desiccation. The chamber meets structural and performance requirements outlined in ISO 17025:2017 (for calibration traceability of onboard sensors), GB/T 3543.6–1995 (China National Standard for Seed Testing: Moisture Determination), and aligns with FAO’s “Genebank Standards” (2021) for pre-storage conditioning infrastructure. Optional NIST-traceable calibration certificates are available for temperature and RH sensors.
Software & Data Management
The embedded HMI interface supports local parameter configuration, real-time trend visualization (temperature/humidity/time), and export of CSV-formatted logs via USB port. For networked facilities, optional Modbus RTU/TCP integration enables connection to centralized LIMS or environmental monitoring systems (EMS). All data records include timestamps, operator ID (if enabled), and sensor validation status—fully compliant with 21 CFR Part 11 requirements when deployed with role-based access control and electronic signature modules. Audit trails retain ≥12 months of historical setpoint changes, alarm events, and calibration entries.
Applications
- Pre-deposition conditioning of seeds entering national or regional germplasm banks (e.g., Chinese National Crop Germplasm Repository, ICARDA-affiliated collections).
- Moisture equilibration of medicinal plant seeds prior to ultra-low temperature storage (−18 °C or −80 °C) to prevent ice nucleation and lipid peroxidation.
- Standardized drying protocol execution per ISTA Rules (Section 6.4: Drying for Moisture Content Determination) and USP Annex on sterile compounding material handling.
- Research-scale studies on seed longevity correlations with initial drying rate, equilibrium moisture content (EMC), and glass transition temperature (Tg) under sub-zero RH conditions.
FAQ
What is the maximum recommended duration for continuous operation?
The chamber is rated for unattended 24/7 operation up to 30 days; however, bi-weekly verification of sensor drift and condensate drain integrity is advised.
Can the TC-DC1515 be integrated into a facility-wide BMS?
Yes—via optional RS485/Modbus or Ethernet/IP interfaces; full point mapping documentation and BACnet MS/TP gateway compatibility support are provided upon request.
Does it support automated calibration verification?
It includes built-in self-diagnostic routines for sensor linearity checks; external verification using chilled mirror hygrometers or reference-grade psychrometers is required annually per ISO/IEC 17025.
Is validation documentation available for GxP environments?
IQ/OQ protocols, as well as completed URS and risk assessment (FMEA) templates, are supplied with the system for customer-executed PQ under internal QA oversight.
