Description
The POL-EKO SLWN 240 is engineered for high-volume laboratories where preventing sample oxidation is as critical as temperature precision. The “N” in the model name highlights its Nitrogen Blow capability.7 By introducing dry nitrogen into the 245-liter chamber, the system effectively purges oxygen, creating an inert environment that protects sensitive materials from degrading, burning, or changing color at high temperatures.Gas Flow Management:The SLWN 240 is configured to ensure that the nitrogen purge is both effective and measurable:SLWN1 Version: Includes a laboratory rotameter that can be officially calibrated?essential for regulated pharmaceutical and aerospace applications.8SLWN2 Version: Equipped with a technical rotameter (non-calibratable) for standard industrial processes where high-precision certification isn’t required.9Efficient Purging: The system is designed to provide a flow rate capable of replacing the chamber’s volume multiple times per hour, as required by standards like ISO 589:2003 for moisture determination in hard coal.10Forced Air Performance:In a chamber of this size, temperature uniformity is maintained through forced air convection.11 The fan actively circulates the heated nitrogen/gas mixture, ensuring a temperature variation of only 12$pm$2.5?C at 105?C.13 This prevents “dead zones” where gas might stagnate or temperatures might drop, ensuring consistent results for all 10 possible shelf positions.+1Smart Control & Security:Interface: The 4.3″ Smart controller provides a clear overview of parameters.14 It allows for complex multi-segment temperature profiles to automate multi-stage curing or drying processes.15Safety: Built-in Class 2.0 (Smart) or Class 3.1 (Smart PRO) over-temperature protection ensures the unit remains safe even during unattended overnight runs.16Documentation: Integrated USB and LAN ports allow for easy data export, providing a full audit trail of both the temperature and the timing of each run.17Primary Applications:Industrial Electronics: Curing large batches of PCBs and semiconductors in an oxygen-free environment.Chemical Production: Drying large volumes of oxygen-sensitive powders or resins.Fuel & Energy Labs: Moisture analysis in coal and coke (ISO 589) where preventing oxidation is mandatory.18Advanced Materials: Heat treatment of polymers or metals that are prone to oxidative degradation.
Specifications
POL-EKO SLWN 240 Drying Oven Specifications
The SLWN 240 is a high-capacity laboratory oven designed for drying in an inert gas atmosphere. It combines forced air convection with a dry nitrogen blow system, making it essential for processes where oxygen must be displaced to prevent oxidation (e.g., drying electronic components or following ISO 589:2003 for coal moisture determination).
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Air Convection: Forced (Fan-assisted)
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Special Feature: Dry nitrogen blow system (includes connections, valves, and rotameter)
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Chamber Capacity: 245 Liters
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Working Capacity: 237 Liters (Note: Effective volume is slightly reduced to accommodate air distribution)
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Temperature Range: +5°C above ambient to +300°C
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Temperature Resolution: 0.1°C
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Temperature Fluctuation at 105°C: ±0.4°C
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Temperature Variation at 105°C: ±2.5°C
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Over Temperature Protection: Class 2.0 (Standard) / Class 3.1 (Optional)
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Controller: Microprocessor PID with 4.3″ touch screen (Smart)
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Internal Dimensions (W x H x D): 600 x 800 x 500 mm
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External Dimensions (W x H x D): 820 x 1140 x 770 mm
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Shelves (Standard / Max): 3 / 10
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Max. Shelf Workload: 25 kg (100 kg for reinforced version)
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Max. Total Unit Workload: 90 kg (300 kg for reinforced version)
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Interior Material: Acid-proof stainless steel (DIN 1.4301)
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Housing Material: Powder coated sheet (Standard) or Stainless steel linen finish (IG version)
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Connectivity: LAN and USB ports
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Voltage: 230V, 50/60 Hz
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Nominal Power: 3100 W
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Weight: 114 kg
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Nitrogen Flow Options
When ordering the SLWN 240, you must choose between two rotameter types:
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SLWN1: Equipped with a laboratory rotameter that can be officially calibrated for precise gas flow monitoring.
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SLWN2: Equipped with a technical rotameter for standard applications where formal calibration is not required.
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Core Functionality
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Oxidation Prevention: By purging the chamber with nitrogen (which has a lower specific gravity than air), the oxygen is immediately displaced, ensuring an anaerobic environment for sensitive samples.
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Smart Data Management: The controller records temperature data and events (like door openings) which can be exported via USB. It also includes an open-door alarm and a door lock for security.
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Industrial Applications: Specifically suited for the aerospace, nuclear, and marine industries, as well as pharmaceutical labs performing moisture analysis under nitrogen.