Truelab SX2-2.5-10N Benchtop Muffle Furnace
| Brand | Truelab |
|---|---|
| Origin | Shanghai, China |
| Model | SX2-2.5-10N |
| Maximum Temperature | 1000 °C |
| Temperature Control Accuracy | ±2 °C |
| Rated Power | 2.5 kW |
| Heating Rate (to Max Temp) | ≤10 °C/min |
| Heating Element | High-Grade Resistance Wire (Ni-Cr Alloy) |
| Internal Chamber Dimensions | 120 × 200 × 80 mm (L×W×H) |
| Chamber Volume | 2 L |
| Voltage/Frequency | 220 V / 50 Hz |
| Furnace Liner Type | Refractory Brick |
| Enclosure Material | Stainless Steel (304) |
Overview
The Truelab SX2-2.5-10N is a benchtop muffle furnace engineered for precision thermal processing in academic, industrial, and quality control laboratories. Designed around resistive heating principles, it employs high-purity nickel-chromium (Ni-Cr) resistance wire embedded within a refractory brick chamber to deliver stable, uniform heat distribution across its 2 L working volume. The furnace operates up to 1000 °C with a certified temperature control accuracy of ±2 °C — achieved via a microprocessor-based PID controller with real-time feedback loop optimization. Its muffle architecture isolates the sample chamber from direct contact with heating elements and combustion byproducts, ensuring contaminant-free thermal treatment essential for ashing, calcination, annealing, and gravimetric analysis per ASTM E1726, ISO 1171, and USP . The unit complies with IEC 61010-1 safety standards for laboratory electrical equipment and is constructed to meet GLP-aligned operational integrity requirements.
Key Features
- Refractory brick-lined chamber (N-series) offering long-term structural stability at sustained high temperatures, with proven service life exceeding 5,000 operational hours under routine use conditions.
- Stainless steel (AISI 304) outer casing and door liner — corrosion-resistant, non-deforming at elevated ambient temperatures, and compatible with cleanroom-grade maintenance protocols.
- Dual-stage door sealing system incorporating high-temperature ceramic fiber gaskets to minimize convective heat loss and maintain internal temperature uniformity (±5 °C across chamber volume at 900 °C).
- Integrated safety interlock: automatic power cutoff upon door opening, preventing operator exposure to radiant heat and eliminating risk of accidental overheating.
- Multi-layer thermal insulation using low-conductivity ceramic fiber board — limits external cabinet surface temperature to <55 °C during continuous operation at maximum setpoint.
- Over-temperature protection, over-current cutoff, and short-circuit monitoring circuits conforming to EN 60204-1 machinery safety directives.
Sample Compatibility & Compliance
The SX2-2.5-10N accommodates crucibles, porcelain boats, quartz dishes, and metal retorts up to 100 mm in height and 150 mm in diameter. Its inert muffle environment supports applications involving oxidizing, inert, or mildly reducing atmospheres (when used with optional gas inlet kits). The furnace meets key regulatory prerequisites for thermal validation workflows, including support for IQ/OQ documentation packages and compatibility with FDA 21 CFR Part 11–compliant data logging systems when paired with external USB or RS485 interfaces. It is routinely deployed in accredited testing labs performing residue-on-ignition (ROI), loss-on-drying (LOD), and total organic carbon (TOC) pre-treatment steps per pharmacopeial methods (USP , EP 2.2.33).
Software & Data Management
While the base model features a standalone PID controller with LED display and manual setpoint adjustment, optional integration with Truelab’s TC-Link™ software enables remote configuration, real-time temperature logging, and export of CSV-formatted time-series datasets. When equipped with the programmable version (SX2-2.5-10NP), users gain access to 30-segment ramp-soak profiles, each supporting independent rate, dwell time (up to 99 h 59 min), and power modulation — fully traceable with timestamped audit trails required for GMP/GLP environments. All firmware revisions adhere to IEC 62304 medical device software lifecycle standards.
Applications
- Thermal decomposition of organic matrices prior to elemental analysis (e.g., AAS, ICP-OES sample preparation)
- Calcination of catalyst precursors and metal oxide powders
- Heat treatment of small-scale metallurgical specimens (annealing, stress relieving, tempering)
- Residue quantification in pharmaceutical excipients and dietary supplements
- Pre-firing of ceramic green bodies and sintering trials in materials R&D
- Standardized ash content determination in coal, biomass, and food products (ASTM D3174, ISO 1171)
FAQ
What type of heating element does the SX2-2.5-10N use?
It utilizes high-strength nickel-chromium resistance wire rated for continuous operation at 1000 °C.
Is the furnace suitable for inert atmosphere processing?
Yes — with optional gas purge ports and flow regulators, it supports nitrogen or argon blanketing for oxygen-sensitive applications.
Can temperature uniformity be validated per industry standards?
Absolutely — the chamber geometry and insulation design enable compliance with ASTM E220 and ISO/IEC 17025 thermal mapping requirements using calibrated thermocouple arrays.
Does the unit include calibration documentation?
Factory calibration certificate (traceable to NIST standards) is provided; on-site verification and periodic recalibration services are available through Truelab’s global service network.
What maintenance is required for long-term reliability?
Annual inspection of door seal integrity, thermocouple calibration check, and visual assessment of heating element continuity — no lubrication or consumable replacement needed under normal operating conditions.
