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FIWE Fiber Analyzers

Fiber Analyzers that use pre-heated reagents for fiber analysis according to Weende, Van Soest and other official methods.
FIWE 3 SA30520201
FIWE 3 SA30530201
FIWE 3 SA30540201
FIWE 6 SA30520200
FIWE 6 SA30530200
FIWE 6 SA30540200

Crude Fiber, Neutral & Acid Detergent Fiber

Crude Fiber, Neutral & Acid Detergent Fiber

FIWE 3 and FIWE 6 are fiber analyzers suitable for raw fiber extraction, conventionally known as an indigestible residue. Rapid analysis, reliable results and high reproducibility are some of the most relevant benefits of these units which are ideal for the following applications:

- the Weende method, the oldest analytical procedure still in use today, in which fiber concentration is measured as crude fiber (CF)

- the Neutral Detergent Fiber (NDF), a method developed by Van Soest, now the most common measure of fiber used for animal feed analysis 

- Acid Detergent Fiber (ADF), a portion of the plant fiber and includes cellulose, lignin and variable amounts of xylans.

- Acid Detergent Lignin (ADL) determination and Wijkstrom technique, a modification of the Weende method

High Reliability, Single or Multiple Extractions

High Reliability, Single or Multiple Extractions

Perform single or multiple extractions including boiling, rinsing and filtration steps with the maximum reproducibility available.

No sample transfer prevents any possible sample loss, as crucibles can also be used as sample vessels during weighing, drying and washing.

Pre-heat the reagents with RC2 hot plate (included), and pour them directly into the system.

Rapid Heating Element

Rapid Heating Element

An extremely efficient heating element speeds up the analysis, ensuring rapid heating of the sample, previously mixed with pre-heated reagents.

Also after the second reagent addition, the heating element grants a fast re-heating of the solution, for conspicuous saving in terms of time.

In fact, FIWE Series reduces the time required for the analysis: the equivalent manual procedure will require more than 6 hours, compared to the 2 hours with FIWE.


No transfer and sample loss

No transfer and sample loss
In order to prepare the sample for fiber analysis, COEX ensures rapid fat extraction directly into the same glass crucibles used by the FIWE series.

The crucible, containing the defatted sample, is transferred directly to the FIWE analyzer, eliminating possible errors due to sample transfer.


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Construction material: epoxy painted stainless steel structure
Type of extractions: cold and hot extractions
Number of samples: FIWE 3 3 positions
FIWE 6 6 positions
Samples: individually processed
Sample quantity: from 0,5 to 3 g
Reproducibility (RSD): ± 1%
Sample removal: air pump
Reagent discharge: peristaltic pump
Digital timer: 0 - 99 minutes with acoustic signal at the end
Temperature: electronic regulation
Reagents and cooling water : separated outlets
Power: FIWE 3 900 W
FIWE 6 1200 W
Weight: FIWE 3 35 Kg (77 lb)
FIWE 6 40 Kg (101.2 lb)
Dimensions (WxHxD): FIWE 3 530x620x390 mm (20.9x24.4x15.4 in)
FIWE 6 760x620x390 mm (29.5x24.4x15.4 in)
Applications Raw fiber (Weende, Wijstrom)
Neutral or acid detergent treatment fiber (Van Soest)
Lignin, Cellulose, Hemicellulose

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Comparison tables

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Application notes

Choose among a comprehensive library of Application Notes / White Papers and learn more on how to optimize the performance of your VELP instruments. These documents offer typical analyses of well-known samples, together with official references and suggestions, to make you an expert!


Our compliance to statutory rules and regulations worldwide.
With the CE mark, VELP Scientifica declares that the products are designed and manufactured in compliance with the essential safety requirements of the European Directive on Safety.
The Certification Body (CB) Certificate is an international program created by the IECEE for the acceptance of product safety test results among participating laboratories and certification organizations around the world.
The cNEMKOus mark ensures this product is designed and manufactured in compliance with the International Directive on Safety IEC/EN 61010-1. The cNEMKOus mark has the same legal status as any other NRTL/SCC accredited marks, for U.S. and Canada.


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