Elastocon EB 11-II & EB 28HT Tube Aging Ovens
| Brand | Elastocon |
|---|---|
| Origin | Sweden |
| Model | EB 11-II, EB 11-II HT, EB 28 HT |
| Temperature Control | Single-zone (EB 11-II/II HT) or Four independent zones (EB 28 HT) |
| Temperature Range | 40–300 °C |
| Sample Capacity | 6 × test tubes (EB 11-II series) or 4 × 6 = 24 test tubes (EB 28 HT) |
| Cooling Method | Air or liquid reflux condensation |
| Compliance | ASTM D471, ASTM D865, ISO 1817 |
| Sensor Type | Pt100 platinum resistance thermometers |
| Mounting | Vertical suspension racks for standardized tube positioning |
Overview
The Elastocon EB 11-II and EB 28 HT Tube Aging Ovens are precision-engineered thermal aging systems designed for standardized evaluation of elastomeric and polymeric materials under controlled elevated-temperature exposure in sealed glass or metal test tubes. These ovens implement gravimetric and dimensional stability assessment protocols required by international material standards—including ASTM D471 (rubber—effect of liquids), ASTM D865 (rubber—aging in air), and ISO 1817 (rubber—determination of the effect of liquids). Unlike general-purpose laboratory ovens, the EB-series units integrate purpose-built tube holders, calibrated Pt100 temperature sensors at each zone (in EB 28 HT), and reflux-compatible chamber architecture to ensure uniform thermal distribution, minimal evaporation loss, and reproducible aging kinetics across replicate samples. The system supports both static air convection and optional liquid reflux condensation configurations, enabling rigorous simulation of service environments where fluid immersion or vapor-phase exposure is critical—such as automotive sealing compounds, cable jacketing, and industrial hose linings.
Key Features
- Two platform variants: EB 11-II (single-zone control, 6-tube capacity) and EB 28 HT (four independently controlled zones, 24-tube total capacity)
- Pt100 platinum resistance temperature sensors integrated at each heating zone for traceable, NIST-traceable calibration compliance
- Stainless-steel vertical suspension racks with standardized spacing to maintain consistent sample orientation and airflow dynamics
- Programmable temperature setpoints from 40 °C to 300 °C with ±0.5 °C stability over 24-hour continuous operation
- Reflux-ready chamber design compatible with water or solvent-based condensation loops per ASTM D471 Annex A
- Thermal insulation and door-seal architecture minimizing ambient heat leakage and ensuring Class II oven classification per IEC 61000-4-3
Sample Compatibility & Compliance
The EB-series ovens accommodate standard DIN/ISO/ASTM test tubes (e.g., 16 mm × 150 mm borosilicate glass) with optional metal tube adapters for aggressive media testing. Each unit supports simultaneous aging of multiple formulations or compound grades—critical for comparative studies in QC release testing or R&D formulation screening. All models comply with the thermal uniformity requirements specified in ASTM D5722 (Standard Practice for Calibration of Laboratory Ovens) and meet the environmental conditioning prerequisites of ISO 23529 (Rubber—General procedures for preparing and conditioning test pieces). Data generated using these ovens satisfy audit requirements under GLP (Good Laboratory Practice) and GMP-aligned quality systems when paired with validated SOPs and electronic logbooks.
Software & Data Management
While the EB 11-II operates via front-panel digital controller with manual logging, the EB 28 HT supports optional RS485 Modbus RTU interface for integration into centralized LIMS or SCADA platforms. Temperature profiles, hold times, and zone-specific deviations are timestamped and exportable in CSV format. When used in regulated environments (e.g., medical device polymer validation), the system supports 21 CFR Part 11-compliant data integrity workflows when deployed with validated third-party acquisition software—enabling electronic signatures, audit trails, and user access controls aligned with FDA expectations for material aging documentation.
Applications
- Accelerated aging of rubber compounds exposed to fuels, lubricants, brake fluids, and hydraulic oils (per ASTM D471)
- Oxidative aging of thermoplastics and TPEs under controlled air atmosphere (per ASTM D865)
- Swelling resistance characterization of elastomers in organic solvents and aqueous electrolytes (per ISO 1817)
- Pre-qualification of seal materials for aerospace hydraulic systems requiring 1,000+ hour thermal soak validation
- Correlation studies between tube-aged specimens and real-world field failure modes in automotive under-hood applications
FAQ
What distinguishes the EB 28 HT from the EB 11-II series?
The EB 28 HT provides four thermally isolated zones with independent PID control and individual Pt100 sensing—enabling concurrent multi-temperature aging protocols (e.g., 70 °C, 100 °C, 125 °C, and 150 °C) within a single run. The EB 11-II series uses single-zone control across all positions.
Can the ovens be used for ASTM D5722 thermal uniformity mapping?
Yes—each unit includes designated sensor ports and mounting points for external thermocouple arrays; validation reports may be generated using calibrated Class I probes per ASTM D5722 Annex B.
Is liquid reflux condensation mandatory for ASTM D471 testing?
No—it is optional but recommended for volatile test fluids. The EB-series chambers are mechanically configured to accept standard reflux condensers without modification.
Do the ovens support GLP-compliant record retention?
When operated with validated data acquisition software and procedural controls, the EB 28 HT meets core GLP data integrity requirements—including secure storage, change tracking, and reviewer sign-off capability.
What maintenance intervals are recommended for long-term calibration stability?
Annual verification of Pt100 sensor accuracy against NIST-traceable reference standards and biannual inspection of door gasket integrity are advised per Elastocon Technical Bulletin TB-EB-03.
