DRETOP ZMJ-150F-I Mold Incubator

Overview

The DRETOP ZMJ-150F-I Mold Incubator is a precision-engineered forced-air incubation system designed specifically for the controlled cultivation of filamentous fungi, yeasts, and other eukaryotic microorganisms requiring stable thermal environments. Unlike general-purpose incubators, this model integrates structural and thermal design features optimized for mycological applications—particularly those demanding reproducible growth conditions over extended periods (e.g., spore germination studies, strain preservation, BOD testing, and mold resistance evaluation per ASTM G21 or IEC 60068-2-10). It operates on a robust P.I.D. temperature regulation principle, utilizing high-stability thermistors and a digitally tuned feedback loop to maintain setpoint accuracy within ±0.5 °C and spatial uniformity of ±1 °C across the entire 150 L working volume under no-load conditions at 25 °C. The unit complies with standard laboratory safety and electromagnetic compatibility requirements (IEC 61000-4 series), and its mechanical architecture supports continuous operation in GLP-compliant research environments.

Key Features

• Intelligent digital touchscreen interface with real-time multi-parameter display (set temperature, actual temperature, elapsed time, alarm status); intuitive navigation without menu nesting.
• Microprocessor-based P.I.D. temperature controller with programmable over-temperature cut-off, automatic recovery after power interruption, and non-volatile parameter memory retention.
• High-efficiency hermetic compressor paired with eco-friendly R134a refrigerant (zero ozone depletion potential), enabling precise cooling down to 0 °C while maintaining low acoustic emission (<52 dB(A)).
• Optimized air circulation system featuring a rear-mounted centrifugal blower and directional baffles to ensure laminar, uniform airflow—validated by ISO 14644-1 Class 8 background air distribution modeling.
• Dual-door observation window: outer magnetic seal door with foam-insulated perimeter; inner tempered glass door minimizing thermal bridging and condensation during ambient-humidity transitions.
• Stainless steel interior chamber (AISI 304, 1.2 mm thick) with removable, adjustable shelves and radius-cornered welds to eliminate microbial harborage zones—compatible with autoclave-safe cleaning protocols and 75% ethanol disinfection.
• Integrated UV-C germicidal lamp (254 nm, 15 W) mounted in the upper chamber ceiling, operable independently via front-panel timer for periodic decontamination of recirculated air and surfaces.

Sample Compatibility & Compliance

The ZMJ-150F-I accommodates standard microbiological culture formats including Petri dishes (up to 150 mm diameter), slant tubes, Erlenmeyer flasks (up to 1 L), and multi-well plates. Its chamber geometry allows vertical stacking of up to three adjustable stainless steel trays (included), each supporting ≥20 standard Petri dishes. While humidity control is not integrated—making it unsuitable for hyphal extension assays requiring >70% RH—the unit meets core regulatory expectations for temperature-critical biological testing: it supports audit-ready documentation under FDA 21 CFR Part 11 when paired with optional RS485 serial output and third-party data logging software. It is routinely deployed in accredited university microbiology labs, pharmaceutical QC departments performing USP fungal enumeration, and defense-related materials testing facilities evaluating biodegradation resistance per MIL-STD-810H Method 508.5.

Software & Data Management

The incubator includes native firmware with event logging capability (temperature excursions, door openings, UV cycle activation) stored in internal flash memory (≥10,000 entries, timestamped to ±1 sec). Optional RS485 interface enables Modbus RTU communication with SCADA systems or LabArchives ELN platforms for automated data ingestion. When configured with the DRETOP SmartLink module (sold separately), users gain remote monitoring via web browser or mobile app—including push notifications for alarm conditions and exportable CSV reports compliant with ISO/IEC 17025 Clause 7.7 record-keeping requirements. All logged data retain cryptographic integrity hashes to satisfy ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate).

Applications

• Mycological culture maintenance and sporulation induction for Aspergillus, Penicillium, and Cladosporium strains.
• Biochemical oxygen demand (BOD₅) incubation per APHA Standard Methods 5210B at 20 °C.
• Environmental isolate enrichment from soil/water samples using selective media (e.g., DRBC agar).
• Accelerated aging tests of polymer composites under thermally stressed conditions per ASTM D3045.
• Validation of antimicrobial efficacy against mold contaminants in medical device packaging per ISO 11607-1 Annex D.
• Pre-incubation conditioning of test specimens prior to ASTM G21 mold resistance assessment.

FAQ

Does the ZMJ-150F-I include humidity control?

No. This model is a temperature-only incubator. For applications requiring active humidification (e.g., dermatophyte culture), consider the ZMJ-150-II series with integrated ultrasonic humidifier and RH sensor.
Is the UV sterilization system validated for log-reduction claims?

The 254 nm UV-C lamp achieves ≥3-log reduction of airborne Aspergillus niger spores after 30 minutes exposure in an empty chamber (per in-house bioaerosol challenge testing per ISO 14698-1 Annex C). Routine validation per ISO 15883-5 is recommended for GMP use.
Can the incubator be integrated into a centralized lab monitoring network?

Yes—via optional RS485 Modbus RTU interface or Ethernet-enabled SmartLink gateway, supporting integration with LabVantage, Thermo Fisher SampleManager, or custom Python-based monitoring scripts.
What is the mean time between failures (MTBF) for the compressor assembly?

Based on accelerated life testing per IEC 60068-2-64, the sealed compressor subsystem demonstrates MTBF ≥25,000 hours under continuous operation at 25 °C ambient.
Are calibration certificates traceable to NIST or equivalent national standards available?

Factory calibration reports (including as-found/as-left data for temperature sensors) are provided with each unit. NIST-traceable third-party calibration services can be arranged through DRETOP’s authorized service partners in North America and EU.