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FOSS - Fat Analyzer - Soxtec™ 8000

The Soxtec™ 8000 extraction unit is a fully automated system for fast and safe extraction of soluble matter from a wide range of matrices. It performs the four extraction steps boiling, rinsing, solvent recovery and auto-shut down, fully unattended. Just load, start and walk away.


First fully automated Soxhlet system. Improving throughput at a lower cost. Reducing risk in fat analysis. Batch handling tools for easy operation.

Sample type

Feed, feed ingredients, forage, pet food, food, food ingredients, grain, cereal, oil seeds, DDGS, meat, meat products, fish, fish products, dairy products, environmental products, (e.g. soil, sludge, waste water) and other industry products (paper pulp, textiles, rubber, tobacco, fertilizer, detergents, plastic and more).


Crude fat, total fat and extractable matter.

The Soxtec™ series

Soxtec™ 8000 ST 255 Soxtec™ ST 243 Soxtec™
Levels of automation Fully automated Semi automated Manual
Positions 6 - 12 6 6
Capacity/day 42/86 samples 30 - 36 samples 30 - 36 samples
Solvent volume 40 - 110 ml 70 - 90 ml 40 - 50 ml
Thimble diameter 26, 33 mm 26, 33 mm 26 mm
Compatible with hydrolysis unit Hydrotec™ 8000 and SC 247 SoxCap™ Hydrotec™ 8000 and SC 247 SoxCap™ SC 247 SoxCap™ with mini capsules

Technical specification

Performance data at 230 V
Extraction time Typically 45 – 60 min
Solvent volume 40 – 110 ml depending on cup type
Sample size 0.5 – 3 g depending on sample type
0.5 – 2 g (for total fat)
Capacity/batch 6/12 positions
Capacity/day 42/84 samples
Temperature range 0 – 285 °C
Measuring range 0.1 – 100 %
Reproducibility 1% rel. Or better (5 – 100% fat)
Solvent Recovery Typically 80 %
Accuracy According to officially approved methods
Installation requirements
Power supply 200 – 240 V 50 – 60 Hz
Power consumption 1500 W (120 VAC version)
1800 W (230 VAC version)
Water consumption 2 l/min < 25°C minimum flow
Weight net Extraction unit: 35 kg
Control unit: 4 kg
Dimensions (W×D×H) Extraction unit: 640 × 350 × 630 mm
Control unit: 280 × 200 × 190 mm

Key features

Flexible operation

The Soxtec™ 8000 total fat solution helps you respond to the demands of your customers, for example, you can do total or crude fat analysis or both. It’s easy to increase capacity according to customer requirements with up to 12 position hydrolysis and six position extraction that is expandable to 12, all with individual hotplate control.

Simplified process

This unique patented Hydrocap™ filter contains the sample from the initial weighing, through hydrolysis to final extraction; avoiding sample transfer errors. It is a fully automated system that performs automated acid hydrolysis and Randall improved Soxhlet extraction in one integrated process.

Secure solvent dispensing & recovery


Soxtec™ systems has an extensive range of accessories with glass and aluminium cups and thimbles in different sizes to fit individual laboratory needs and applications.

How to do crude fat analysis with the Soxtec 8000 system

  • Biopharmaceutical and Biotechnology
  • Chemical
  • Education & Academics
  • Environmental
  • Food & Beverage
  • Pharmaceutical
Foss Analytical

FOSS creates end-to-end solutions that secure and improve food quality. From raw material to finished product. Our analysis instruments refine measurements into information management that enables businesses to run intelligent data-driven productions with less waste and bigger yields. Controlling cost and quality across all sectors and value chains, we help food and agricultural producers limit the number of human errors, scale their business faster and reduce manual labor as well as labor costs. We call it analytics beyond measure.

We cover these food and agricultural industries: Dairy, Feed and Forage, Grain, Flour Milling & Oilseed Processing, Laboratories, Meat, Raw Milk Testing and Wine.

Over the last 60 years, we have made it our business to define the standard of analytical solutions for the food and agricultural industry. We pioneered advanced analysis for the challenging production environments in the 1960’s, and we were the first to integrate chemical composition analysis in process lines. Now our resolve and ambition have also made us the international benchmark in the field of chemometrics and real time analytics.