ChemTron FCI003 ISO 2431 Efflux Viscometer Cup
| Brand | ChemTron |
|---|---|
| Origin | Germany |
| Model | FCI003 |
| Standard | ISO 2431 |
| Orifice Diameter | 3 mm |
| Viscosity Range | 5–42 cSt |
| Instrument Type | Fixed-geometry efflux viscometer |
| Application Environment | Ambient temperature (25 °C standard) |
| Compliance | ISO 2431, ASTM D1200 (cross-referenced), DIN 53211 |
Overview
The ChemTron FCI003 ISO 2431 Efflux Viscometer Cup is a precision-engineered gravity-driven flow device designed for rapid, repeatable determination of kinematic viscosity in low-to-medium viscosity Newtonian and near-Newtonian liquids. Operating on the principle of efflux time measurement—where a fixed volume of sample flows under gravity through a standardized orifice—the FCI003 delivers kinematic viscosity values (in centistokes, cSt) via empirically validated calibration equations defined in ISO 2431. Unlike rotational or vibrational viscometers, this cup-type instrument requires no electronics, power supply, or moving parts; its performance relies entirely on dimensional accuracy, surface finish, and strict adherence to temperature-controlled test conditions (typically 23 °C or 25 °C per ISO 2431 and ASTM D1200). It is widely deployed in QC laboratories across coatings, inks, varnishes, adhesives, and solvent-based formulations where rapid pass/fail screening or batch consistency verification is required prior to more advanced rheological analysis.
Key Features
- Precision-machined stainless steel body with electro-polished internal orifice (3.0 mm nominal diameter) ensuring long-term dimensional stability and resistance to corrosion from organic solvents and aggressive media.
- ISO 2431-compliant geometry: conical reservoir, vertical discharge tube, and defined orifice chamfer—fully traceable to national metrology standards.
- Integrated support collar compatible with both ChemTron universal viscometer stands (models ST-100 and ST-200), enabling vertical alignment within ±0.1° for gravitational flow integrity.
- Calibration-certified efflux time range of 30–100 seconds for optimal repeatability (per ISO 2431 recommendation); viscosity conversion uses the standard equation ν = K × t, where K is cup-specific calibration constant (supplied with NIST-traceable certificate).
- No user-adjustable components—designed for operational simplicity, minimal training requirements, and compliance with GLP documentation workflows.
Sample Compatibility & Compliance
The FCI003 is intended for homogeneous, particle-free, low-sediment liquids with kinematic viscosities between 5 and 42 cSt at standard test temperature (25 °C). It is not suitable for non-Newtonian fluids exhibiting shear-thinning, thixotropy, or yield stress behavior—such samples require rotational rheometry. Compatible matrices include alkyd resins, acrylic dispersions, nitrocellulose lacquers, mineral spirits, and low-viscosity polyurethane prepolymers. The instrument meets the physical design and procedural requirements of ISO 2431:2019 and is cross-validated against ASTM D1200-22 for comparative reporting. When used within an auditable quality system, data generated using the FCI003 supports ISO/IEC 17025 method validation, FDA 21 CFR Part 11–aligned electronic records (when paired with compliant timing software), and routine GMP batch release testing.
Software & Data Management
As a passive mechanical instrument, the FCI003 operates independently of embedded firmware or proprietary software. However, it integrates seamlessly into digital lab ecosystems via external high-accuracy digital timers (e.g., Chronos Pro series) that log efflux time with 0.01 s resolution, timestamping, and CSV export. ChemTron provides a validated Excel-based calculation template (validated per ICH Q2(R2)) that applies cup-specific K-factors and temperature correction coefficients (ASTM D445 Annex A1) to convert raw time data into kinematic viscosity. Audit trails, user access controls, and electronic signature capability are maintained at the timer or LIMS level—not within the cup itself—ensuring full compliance with ALCOA+ data integrity principles.
Applications
- Coatings manufacturing: In-line viscosity checks of base paints, primers, and clearcoats before filtration and filling.
- Ink formulation labs: Rapid comparison of solvent blends and resin solutions during R&D screening.
- Quality control of thinners and reducers: Verification of dilution ratios and solvent purity.
- Supplier qualification: First-article inspection of incoming raw materials such as rosin esters or modified cellulose ethers.
- Educational laboratories: Demonstration of Newtonian fluid behavior, Hagen–Poiseuille flow principles, and ISO standardization methodology.
FAQ
What is the recommended temperature control method for ISO 2431 testing?
Standard practice requires immersion in a thermostatically controlled water bath (±0.2 °C) for 30 minutes prior to measurement. ASTM D1200 permits air-bath conditioning when justified by product specifications.
Can the FCI003 be used for non-Newtonian fluids?
No—efflux cups assume laminar, gravity-driven flow governed by Poiseuille’s law; deviations due to shear-dependent viscosity invalidate results.
How often should the orifice be inspected or recalibrated?
Visual inspection for debris or wear is mandatory before each use. Full dimensional verification (via optical comparator) is recommended annually or after 500 measurements, per ISO 2431 Clause 6.3.
Is the FCI003 supplied with a calibration certificate?
Yes—each unit ships with a manufacturer-issued certificate listing orifice diameter (measured via SEM), K-factor (determined against NIST SRM 2783), and uncertainty budget (k=2).
What stand models are compatible with the FCI003?
ChemTron ST-100 (benchtop vertical holder) and ST-200 (adjustable-height universal stand with spirit level and clamping base).
