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Advanced Filter‑Bag Technology for Unattended Operation
Application Scope Crude‑fibre analysis plays a vital role in feed‑and‑food testing. The FB‑300CN fully‑automatic crude‑fibre analyzer is designed for fibre content determination in samples. It measures crude fibre (CF), neutral‑detergent fibre (NDF), acid‑detergent fibre (ADF), acid‑detergent lignin (ADL), cellulose, hemicellulose and other indicators in feed, food, grains, plant tissues and forage grass. It processes up to 27 samples per batch and greatly boosts testing throughput.
Its precision‑optimized design integrates digestion, filtration, rinsing and waste‑liquid discharge in one unit. It automatically completes acid‑alkali reagent dosing, sample digestion, agitation and rinsing as well as waste discharge. Equipped with built‑in reagent pumps and control valves together with precise temperature regulation, the instrument fully complies with AOAC and national GB standards. It is widely deployed in livestock & poultry feed, grain‑oil food, pet‑feed, agriculture, forestry and grass‑industry laboratories.
Principle & Performance The FB‑300CN adopts filter‑bag technology for fibre‑content analysis. Pre‑weighed samples are sealed inside filter bags and digested with heated chemical reagents. Soluble cell contents are removed while fibre fractions are retained. Reagents freely permeate filter bags for repeated sample rinsing. Continuous vertical movement of filter bags keeps samples well‑agitated and ensures homogeneous digestion. Finally, samples are defatted with acetone, dried, and fibre content is calculated via gravimetric method.
Full workflow automation and standardisation eliminate major sources of analytical bias and improve accuracy and repeatability. The filter‑bag workflow removes tedious filtration steps, shortening analysis cycles and enhancing throughput.
Traditional crucible‑based methods suffer from multiple drawbacks: cumbersome vacuum filtration, frequent crucible frit blockage caused by sample caking, repeated manual air‑back‑blow and vacuum operations. Residual sample material easily adheres to beaker and tube walls and demands extensive rinsing for full sample recovery. Vigorous boiling may generate heavy foam; even with octanol addition, sample residues can remain on vessel walls, causing inconsistent digestion and skewed results. Poor crucible sealing may trigger liquid leakage and total test failure.
This instrument features four external reagent ports for acid reagent, alkali reagent, neutral‑detergent solution and acid‑detergent solution. Built‑in dosing pumps rapidly draw analytical reagents. Up to four reagent containers can be connected simultaneously to support high‑volume sample batches. An amylase reagent cup enables automatic amylase dosing into the digestion vessel according to programmed parameters during NDF testing.
Instrument Features
Full Automation & Unattended Operation
‑ Fully‑automatic digestion sequence after sample loading with no continuous operator attendance required.
‑ Colour touch‑screen with bilingual Chinese‑English menu interface.
‑ Fully‑automated workflow including sample digestion, agitation, rinsing and waste‑liquid discharge.
‑ Programmable analytical parameters: reagent dosage, digestion duration, rinsing cycles and duration.
‑ One‑touch selection of analysis types and standard test methods.
‑ Automatic selection and dosing of corresponding chemical or enzymatic reagents based on selected assay.
High‑Throughput Analysis & Low Operating Cost
‑ Maximum batch capacity: 27 samples per run.
‑ Daily throughput: 108 crude‑fibre samples / 135 NDF samples / 162 ADF samples.
‑ Sample holders are arranged in 120° cross‑orientation with 60° offset between adjacent racks to achieve thorough sample rinsing.
‑ Reagent‑saving mode is available for half‑volume reagent consumption.
‑ Closed heating design eliminates tap‑water reflux‑condensation requirements and reduces water consumption.
Reliable Analytical Accuracy
‑ Fully compliant with test protocols specified by AOCS and AAFCO.
‑ Test results are consistent with national GB standard reference values.
‑ Certified reference‑material samples are available as optional accessories.
‑ Multi‑level user‑access management ensures standardized laboratory operation.
Comprehensive Safety Protection
‑ Dual liquid‑level sensors monitor reagent volume inside the digestion vessel; heating stops automatically and alarms trigger upon low reagent / hot‑water shortage.
‑ Temperature sensors deliver real‑time reagent‑temperature monitoring.
‑ Pressure sensors continuously track internal vessel pressure; heating cuts off and alarms activate under over‑pressure conditions.
‑ Mechanical safety relief valve opens automatically once pressure exceeds safety threshold.
‑ Excess reagent inside the vessel overflows automatically.
‑ Lockable digestion‑vessel lid with position‑sensor interlock.
LabConnect Software Management System
‑ Seamless compatibility with OPSIS LabConnect LIMS software.
‑ Push alarm notifications to mobile devices for timely intervention during unattended runs.
‑ Supports connection to analytical balances and barcode scanners for automatic import of sample weight and sample ID information.
‑ Enables experimental‑result processing and data management via LabConnect software.
Technical Specifications
‑ Analytical technique: Filter‑bag‑based sample analysis
‑ Sample throughput: 27 samples per batch
‑ Maximum daily capacity: 108 crude‑fibre samples per day
‑ Sample weight: 0.1‑2.0 g ‑ Measuring range: 0‑100%
‑ Repeatability: ≤ 0.5% ‑ Working temperature: Ambient to 100 °C
‑ Temperature‑control accuracy: ± 0.1 °C
‑ Operation interface: Colour LCD touch‑screen, Chinese‑English bilingual; fast assay‑type selection
‑ Programmable functions: 50 groups of custom‑built test protocols stored onboard
‑ Editable parameters: Digestion time, temperature, rinsing duration and rinsing cycles
‑ Automatic functions: Temperature control, agitation, reagent dosing and waste‑liquid discharge
‑ Automatic reagent / enzyme‑reagent selection according to selected assay method
‑ Installation: Fits standard laboratory bench; no fume‑hood required
‑ Safety protections: Reagent liquid‑level monitoring, temperature monitoring, pressure monitoring