Faithful 98-II-C Digital Electric Heating Mantle (50 mL Capacity)
| Brand | Faithful |
|---|---|
| Origin | Hebei, China |
| Model | 98-II-C |
| Capacity | 50 mL |
| Max Surface Temperature | 450 °C |
| Temperature Control Range | Ambient +20 °C to 250 °C |
| Heating Element | Nickel-Chromium Alloy Wire |
| Insulation | High-Purity Alumina-Silica Ceramic Fiber (CE Certified) |
| Housing | Cold-Rolled Steel with Epoxy Powder Coating |
| Power Rating | 0.08 kW |
| Voltage | 200–240 V AC |
| Net Weight | 2.5 kg |
| Dimensions (Ø × H) | 220 mm × 165 mm |
| Temperature Sensor | PT100 Platinum Resistance Thermometer with Adjustable Mount |
| Controller Type | PID-Based Digital Temperature Controller with LED Display |
| Compliance | CE-marked insulation material, RoHS-compliant construction |
Overview
The Faithful 98-II-C Digital Electric Heating Mantle is an entry-level, precision-controlled laboratory heating device engineered for consistent thermal delivery to round-bottom flasks and other cylindrical glassware. Unlike open-heating elements or hot plates, this mantle employs surface-conduction heating via a flexible, conformal ceramic-fiber-insulated nickel-chromium coil wound around a contoured steel housing. This design ensures uniform radial heat distribution, minimizes thermal gradients across the vessel wall, and eliminates direct flame or contact-hotspot risks. The integrated PID digital controller—paired with a calibrated PT100 platinum resistance thermometer mounted on an adjustable bracket—enables stable setpoint maintenance within ±1.5 °C across its operational range (ambient +20 °C to 250 °C), making it suitable for reflux, solvent evaporation, controlled digestion, and low-temperature synthesis protocols where reproducibility matters more than ultra-high temperature capability.
Key Features
- PID-based digital temperature controller with 0.1 °C resolution LED display and auto-tuning functionality for rapid stabilization
- Adjustable PT100 sensor arm allows precise positioning against flask curvature for representative temperature feedback
- High-density alumina-silica ceramic fiber insulation (CE certified) provides thermal efficiency, low surface casing temperature, and long-term dimensional stability at elevated temperatures
- Cold-rolled steel housing with industrial-grade epoxy powder coating resists chemical splashes, mechanical abrasion, and corrosion in shared lab environments
- Optimized 50 mL capacity geometry ensures full contact coverage for standard 24/40 or 29/32 joint round-bottom flasks without overhang or air gaps
- Low-power 0.08 kW rating supports energy-conscious operation while delivering sufficient thermal flux for small-scale reactions and sample conditioning
Sample Compatibility & Compliance
The 98-II-C mantle is designed exclusively for use with borosilicate glass vessels (e.g., Pyrex®, Kimax®) having nominal capacities of 50 mL. Its internal contour accommodates standard conical or spherical flask profiles with neck diameters between 20–30 mm. It is not intended for flat-bottom containers, metal reactors, or pressure-rated systems. All insulation materials comply with EU Directive 2011/65/EU (RoHS) and carry CE marking for thermal safety and electromagnetic compatibility (EMC). While not classified as a GLP/GMP-critical instrument, its temperature repeatability and traceable sensor integration support documentation requirements under ISO/IEC 17025-accredited laboratories when used with external calibration logs.
Software & Data Management
This unit operates as a standalone analog-digital hybrid system with no embedded firmware, network interface, or data logging capability. Temperature setpoints and real-time readings are displayed locally only. For auditability in regulated workflows, users may integrate external USB or RS-232 temperature loggers (e.g., Omega OM-DAQPRO-5300 series) via the PT100 output terminals—provided third-party calibration certificates are maintained per ISO/IEC 17025 Section 6.6. No proprietary software, cloud services, or FDA 21 CFR Part 11 compliance features are included or supported.
Applications
- Controlled heating of reagent solutions during titration preparation or buffer standardization
- Gentle solvent removal from chromatographic fractions under nitrogen sweep
- Pre-warming of enzymatic assay mixtures prior to kinetic measurement
- Low-temperature hydrolysis or esterification in teaching labs and QC screening
- Conditioning of moisture-sensitive standards before gravimetric analysis
- Support heating for simple distillation setups using 50 mL pear-shaped flasks
FAQ
Is the 98-II-C compatible with 120 V power supplies?
No. This model is rated exclusively for 200–240 V AC, 50/60 Hz operation. A step-down transformer is required for use in North American or Japanese mains environments.
Can I replace the PT100 sensor myself?
Yes—the sensor is field-replaceable using M4 threaded mounting and standard 3-wire RTD wiring. Users must verify calibration post-replacement using a NIST-traceable reference thermometer.
Does the mantle include over-temperature protection?
It features a redundant bimetallic thermal cutoff switch (non-resettable) wired in series with the heating circuit, activated at 280 °C ±5 °C. This is a mechanical fail-safe independent of the PID controller.
What maintenance is required for long-term accuracy?
Annual verification of PT100 resistance at 0 °C and 100 °C using a calibrated bridge, plus visual inspection of insulation integrity and housing coating adhesion, is recommended per manufacturer guidelines.
Is the CE marking affixed to the unit or only the insulation material?
The CE mark appears on the product nameplate; the certification applies to the complete assembled unit, including electrical safety, EMC, and thermal hazard compliance per EN 61000-6-3 and EN 61000-6-4.
