DRETOP TLG-3375B Vertical Forced-Air Drying Oven

Overview

The DRETOP TLG-3375B is a vertically oriented, forced-air drying oven engineered for precision thermal processing in regulated laboratory and industrial quality control environments. It operates on the principle of uniform convective heat transfer—using a high-efficiency, high-temperature-rated centrifugal fan and optimized internal air ducting to ensure consistent airflow distribution across the entire working chamber. Unlike natural convection ovens, this model maintains stable thermal profiles under load by actively circulating heated air through a symmetrical baffle system, minimizing stratification and cold spots. Designed for non-volatile, non-flammable materials, it supports critical processes including moisture removal, dry-heat sterilization (in accordance with ISO 17665-1 and USP ), thermal aging of electronic components, residual solvent evaporation, and pre-conditioning of reference standards prior to analytical testing.

Key Features

• Large-format backlit LCD interface with tri-color status display (green/yellow/red), enabling real-time monitoring of setpoint, actual temperature, elapsed time, and diagnostic codes.
• Microprocessor-based PID temperature controller with programmable ramp-soak profiles, adjustable hysteresis, and auto-tuning capability for minimized overshoot and stabilized equilibrium.
• Dual-layer tempered glass observation window with low-emissivity coating ensures clear visual access while maintaining thermal integrity and operator safety.
• Adjustable, removable stainless steel shelving system with tool-free height positioning—optimized for rapid cleaning and flexible sample loading configurations.
• Two-stage rotary locking mechanism with zinc-alloy handle and compression-sealed silicone gasket guarantees uniform door contact pressure, reducing thermal leakage and improving energy efficiency.
• Patented dual-speed hot-air circulation system with automatic condensate venting function prevents internal humidity accumulation during prolonged low-temperature drying cycles.
• Independent over-temperature protection circuit—compliant with IEC 61000-4-5 surge immunity and EN 60519-2 safety requirements—triggers immediate power cutoff and simultaneous audible/visual alarm if preset limit is exceeded.
• Power-loss recovery mode retains all user-defined parameters (setpoint, timer, alarm thresholds) in non-volatile memory, eliminating manual reconfiguration after unexpected outages.

Sample Compatibility & Compliance

The TLG-3375B accommodates a broad range of inert, thermally stable samples—including glassware, ceramic substrates, polymer films, metal coupons, pharmaceutical excipients, and food-grade packaging materials—within its 3375 L (1.5 m³) stainless steel chamber. Its construction meets Class II equipment requirements per ISO 14644-1 cleanroom compatibility guidelines when operated under controlled ambient conditions. The unit complies with CE marking directives (2014/30/EU EMC, 2014/35/EU LVD), RoHS 2011/65/EU material restrictions, and GB/T 5170.2–2017 (Chinese national standard for temperature test equipment performance verification). While not certified for explosive atmospheres (ATEX/IECEx), it is suitable for use in general-purpose laboratories adhering to GLP and ISO/IEC 17025 documentation protocols.

Software & Data Management

The integrated controller supports optional data logging via USB flash drive export (CSV format), enabling post-run analysis of temperature-time trajectories using third-party software such as MATLAB or Excel. Optional RS-485 Modbus RTU interface allows integration into centralized building management systems (BMS) or LIMS platforms for automated audit trail generation—supporting FDA 21 CFR Part 11-compliant electronic records when paired with validated timestamped firmware and role-based access control modules. An optional color touchscreen upgrade provides multi-segment programmable ramp/soak functionality (up to 30 steps), real-time graphing, and password-protected parameter editing—facilitating reproducible thermal protocols required for ISO 9001:2015 process validation.

Applications

• Dry-heat sterilization of surgical instruments, pipette tips, and Petri dishes at ≥160°C for ≥2 hours (per ISO 17665-1 Annex C).
• Moisture content determination in coal, soil, and agricultural commodities per ASTM D3173 and ISO 589.
• Thermal aging studies of PCB laminates and encapsulated semiconductors per IPC-TM-650 2.6.7 and JEDEC JESD22-A108.
• Baking of coated substrates and curing of powder coatings within automotive and aerospace QC workflows.
• Pre-drying of hygroscopic reference standards prior to Karl Fischer titration or gravimetric analysis.
• Conditioning of filter membranes and chromatography columns before HPLC system qualification.

FAQ

Is the TLG-3375B suitable for sterilizing biological waste?
No. This unit is designed for dry-heat sterilization of heat-stable, non-porous items only—not for biohazardous or organic waste, which requires steam autoclaving per EN 285 or ISO 13485.
Can the oven be validated for GMP compliance?
Yes. With optional IQ/OQ documentation packages, NIST-traceable calibration reports, and 21 CFR Part 11–enabled data logging, it supports qualification under EU Annex 15 and FDA Process Validation Guidance.
What is the maximum allowable load volume without compromising temperature uniformity?
For optimal performance, total loaded volume should not exceed 70% of chamber capacity; full-load uniformity testing per ISO 17025 Clause 5.10 is recommended prior to routine use.
Does the unit include factory calibration certification?
Standard delivery includes a certificate of conformance; NIST-traceable calibration certificates and on-site SAT (Site Acceptance Testing) are available as value-added services.
Is remote monitoring supported?
Yes—via optional Ethernet-to-RS485 gateway and compatible SCADA middleware, enabling real-time telemetry, alarm notifications, and historical trend retrieval from external workstations.