Gerber NF3800 Precision Butyrometer Reading Stand
| Origin | Germany |
|---|---|
| Supplier Type | Authorized Distributor |
| Origin Category | Imported Instrument |
| Model | NF3800 |
| Pricing | Available Upon Request |
Overview
The Gerber NF3800 Precision Butyrometer Reading Stand is an optically engineered laboratory instrument designed for the standardized visual interpretation of fat column height in Gerber-type butyrometers following centrifugal separation of milk or dairy product samples. It operates on the principle of controlled illumination and fixed-axis magnification to eliminate parallax error, operator-induced tilt, and inconsistent viewing angles—common sources of measurement variability when reading fat columns manually. The device complies with the foundational optical and ergonomic requirements outlined in ISO 1735:2023 (Milk and milk products — Determination of fat content — Gerber method) and supports traceable, repeatable quantification of fat content in accordance with national dairy standards (e.g., AOAC 920.121, IDF 1A:2017). Unlike handheld observation, the NF3800 fixes the butyrometer at a calibrated 45° incline under uniform cold-white LED illumination (5000 K, CRI >90), enabling unambiguous alignment of the meniscus with the engraved scale and minimizing inter-operator variance.
Key Features
- Fixed-angle (45° ± 0.5°) butyrometer cradle machined from anodized aluminum for thermal stability and corrosion resistance
- Dual-intensity, flicker-free LED light source with adjustable brightness (10–100% range) to optimize contrast for both pale and dark fat columns
- Integrated scale-viewing lens with 2× optical magnification and anti-reflective coating for distortion-free meniscus delineation
- Non-slip silicone base and removable sample tray compatible with standard Gerber butyrometers (11 mL and 12 mL formats)
- Modular design allowing benchtop installation or integration into QC workflow stations; footprint: 185 × 120 × 160 mm (W × D × H)
- No electrical certification required—operates via standard 100–240 V AC adapter with Class II insulation
Sample Compatibility & Compliance
The NF3800 is validated for use with all conventional Gerber butyrometers conforming to ISO 1735 Annex A specifications, including those manufactured by Gerber AG (Switzerland), Scharer (Germany), and certified third-party suppliers. It accommodates samples processed per official methods: raw milk, pasteurized milk, cream, whey, recombined milk, and fermented dairy products (e.g., yogurt base). The reading stand itself does not perform chemical analysis or centrifugation—it functions exclusively as a metrological aid for post-centrifugation visual assessment. As such, it supports compliance with GLP documentation requirements through consistent positioning and illumination, and its mechanical calibration can be verified using NIST-traceable angle gauges and photometric standards. No software validation is required, though usage logs may be maintained per internal QA protocols.
Software & Data Management
The Gerber NF3800 is a standalone optical instrument with no embedded firmware, connectivity ports, or digital output interfaces. It requires no software installation, network configuration, or cybersecurity controls. All readings remain analog and operator-recorded—consistent with traditional Gerber methodology where final fat percentage is calculated manually using the formula: Fat (%) = (fat column height in mm × calibration factor). Laboratories implementing electronic lab notebooks (ELN) or LIMS may capture readings directly into structured fields; however, the NF3800 itself provides no data export capability. Its design intentionally avoids digital dependencies to ensure uninterrupted operation in regulated environments where software validation (e.g., FDA 21 CFR Part 11) would otherwise apply.
Applications
- Routine fat quantification in dairy quality control laboratories performing >50 Gerber tests/day
- Training facilities requiring standardized visual assessment techniques for new technicians
- Reference laboratories conducting method verification studies against ISO 1735 repeatability criteria (RSD ≤ 2.0% within-run)
- Regulatory inspection units performing on-site dairy compositional audits
- Research labs investigating emulsion stability or fat globule distribution where precise meniscus localization affects downstream interpretation
FAQ
Does the NF3800 replace the centrifuge or reagents in the Gerber method?
No. The NF3800 is strictly a reading aid and does not substitute any step of the standardized Gerber procedure—including sulfuric acid addition, isoamyl alcohol dosing, centrifugation, or temperature-controlled incubation.
Can it be used with non-Gerber butyrometers (e.g., Babcock tubes)?
No. The cradle geometry, scale alignment, and illumination profile are optimized exclusively for Gerber-format tubes per ISO 1735 dimensional tolerances.
Is periodic recalibration required?
The mechanical angle and optical alignment are factory-set and stable under normal lab conditions. Users should verify inclination annually using a certified digital inclinometer and inspect lens cleanliness before each shift.
What maintenance does the unit require?
Routine cleaning of the lens and cradle with lint-free cloth and isopropyl alcohol; no lubrication or internal servicing is necessary. LED service life exceeds 50,000 hours.
