BOXUN BMJ-800C Mold Incubator with Humidity Control

Overview

The BOXUN BMJ-800C Mold Incubator with Humidity Control is a purpose-engineered environmental chamber designed for the reliable, long-term cultivation and maintenance of filamentous fungi, yeasts, and other moisture-sensitive microorganisms under precisely regulated temperature and relative humidity conditions. Unlike standard CO₂ or general-purpose incubators, this model implements a dual-circuit control architecture—separate PID-regulated thermal and humidification loops—ensuring independent, stable setpoint maintenance across both parameters without cross-interference. Its operation follows ISO 8573-1-compliant air handling principles: recirculated air passes through a high-efficiency centrifugal blower, traverses a patented asymmetric airflow duct system, and undergoes uniform laminar distribution via rear-wall perforated panels—minimizing thermal stratification and achieving ≤±1.5 °C spatial uniformity at 37 °C (per ASTM E1657-21 Annex A2 verification protocol). The chamber operates within a certified 0–60 °C temperature range and maintains 50–90 % RH with ±5 % RH stability, fulfilling critical requirements for mycological standard methods including ISO 7954 (mold enumeration), USP , and EN 13725 (bioaerosol viability studies).

Key Features

• Integrated refrigeration system with international-brand hermetic compressor and zero-ozone-depletion refrigerant (R134a or equivalent), compliant with EU F-Gas Regulation (EU) No 517/2014
• Energy-free automatic defrost technology using finned-tube heat exchange—eliminates temperature perturbation during defrost cycles and supports uninterrupted 72+ hour continuous operation
• Imported capacitive humidity sensor (Honeywell HIH-4030 series or equivalent) calibrated traceably to NIST standards; paired with finned electric heating humidifier and 5.5 L external water reservoir for >120-hour unattended humidification
• Microprocessor-based controller with 4.3-inch backlit LCD interface, supporting 30-segment × 99-cycle programmable profiles with real-time logging of temperature/humidity/time stamps
• Robust mechanical construction: cold-rolled steel exterior with electrostatic epoxy-polyester coating; mirror-finish 304 stainless steel interior; six height-adjustable 304SS shelves (load capacity: 15 kg/shelf)
• RS-485 communication port enabling Modbus RTU protocol integration with LIMS, SCADA, or centralized lab monitoring systems; optional audit-trail-enabled data export compliant with FDA 21 CFR Part 11

Sample Compatibility & Compliance

The BMJ-800C accommodates standard microbiological sample formats—including Petri dishes (90–150 mm), multi-well plates (6–96-well), slant tubes, liquid culture flasks (up to 2 L), and plant tissue culture vessels—without obstruction from internal airflow structures. Its sealed chamber design (IPX1-rated ingress protection) prevents cross-contamination between adjacent samples and supports BSL-1 and BSL-2 compatible workflows when used with appropriate biosafety practices. Regulatory alignment includes conformity with IEC 61000-6-3 (EMC emissions), IEC 61000-6-2 (immunity), and GB/T 14710–2009 (Chinese national standard for environmental test equipment). Optional factory-installed validation packages include IQ/OQ documentation per GAMP 5 guidelines and temperature/humidity mapping reports generated per ISO 14644-3 Annex B.

Software & Data Management

The embedded controller records time-stamped temperature and humidity values at user-selectable intervals (1–60 min), storing up to 30,000 data points in non-volatile memory. Upon power interruption or system reset, all active parameters—including program steps, alarm thresholds, and calibration offsets—are retained via EEPROM-backed memory with auto-recovery on restart. RS-485 output enables bidirectional communication with third-party software platforms such as LabVIEW, MATLAB, or custom Python-based dashboards using open Modbus register maps. For regulated environments, optional firmware upgrade provides electronic signature support, role-based access control (admin/operator), and ALCOA+ compliant audit trails—including user ID, timestamp, parameter change, and reason code—for full traceability during GLP/GMP audits.

Applications

• Mycological testing per ISO 11133 and AOAC 991.14: Aspergillus niger, Penicillium spp., and Cladosporium herbarum growth kinetics under controlled hygrothermal stress
• BOD₅ and respirometric assays requiring simultaneous O₂ depletion monitoring and fungal biomass development
• Pharmaceutical stability testing of excipients and APIs under ICH Q1B intermediate conditions (30 °C/65 % RH)
• Agricultural seed-borne pathogen isolation (e.g., Fusarium graminearum on wheat kernels) and antifungal efficacy screening
• Environmental mold remediation validation: comparative growth assessment on building materials (drywall, wood, carpet) per AIHA RP-1002
• Plant tissue culture initiation and callus proliferation where elevated humidity mitigates explant desiccation

FAQ

What is the maximum permissible load volume while maintaining specified humidity uniformity?
The 800 L working volume is validated for ≤70 % shelf surface occupancy (i.e., ≤1.2 m² total footprint) to preserve ±5 % RH uniformity across all zones.
Does the unit comply with FDA 21 CFR Part 11 for electronic records?
Out-of-the-box functionality meets baseline data integrity requirements; full Part 11 compliance requires optional firmware activation and implementation of site-specific SOPs for electronic signatures and audit trail review.
Can the BMJ-800C operate continuously at 50 °C and 90 % RH?
Yes—thermal and humidification subsystems are independently rated for concurrent operation at maximum setpoints, verified per 168-hour accelerated life testing per IEC 60068-2-2.
Is calibration certificate included with shipment?
A factory-as-tested calibration report (temperature/humidity at three points) is provided; UKAS/NIST-traceable certificates require separate order and on-site verification by accredited metrology service.
What maintenance intervals are recommended for optimal performance?
Compressor oil inspection every 24 months; humidifier tank cleaning weekly; HEPA pre-filter replacement every 6 months; full chamber decontamination with 70 % ethanol bi-weekly in high-biohazard applications.