Kjeldahl range
COLO.Science — Organic elemental analysis · Kjeldahl
KJELFASTER-K900 Fully Automatic Kjeldahl Analyzer
KJELFASTER-K900 is a fully automatic Kjeldahl analyzer with a 10″ HD Android touchscreen, simultaneous distillation and variable-speed colorimetric titration, and a burette resolution of 1.0 µL/step (0.2 or 0.4 µL/step optional). It measures 0.1–240 mg N with recovery ≥99.5 % in 3–8 min per sample, needs only 0.5 L/min cooling water thanks to its metal condenser, stores 1 million results with 21 CFR Part 11 user management and audit trail included, and runs unattended with the optional 24-position KJELFASTER-A24 autosampler.
Overview
Applications
- Accredited food and feed labs: protein and nitrogen with user management and a complete audit trail.
- Dairy: milk protein in long series by the classical Kjeldahl method.
- Pharma and regulated QC: 21 CFR Part 11: user levels, audit trail, password ageing.
- Environment and agriculture: TKN in water; total nitrogen in soil, plants and fertilizers.
Why KJELFASTER-K900
- Data integrity included: 21 CFR Part 11 user management, audit trail and password ageing — no paid software option.
- Low water and running cost: metal condenser with 0.5 L/min cooling water; standard φ42 mm tubes and open reagents.
- Flexible method: steam flow 0–100 %, two distillation sequences, delay function, simultaneous distillation and titration.
- Unattended batches: optional KJELFASTER-A24: 24 positions, separate cleaning position, 4 × 15 L reagent tanks.
Technical specifications
| Model | KJELFASTER-K900 |
| SKU | PRO3572 |
| Instrument type | Fully automatic Kjeldahl analyzer |
| Measuring range | 0.1–240 mg N |
| Recovery | ≥99.5 % |
| Reproducibility | relative error of mean value ±0.5 % |
| Time per sample | 3–8 min per sample |
| Sample size | solid ≤5 g, liquid ≤20 mL |
| Digestion tubes | φ42 mm, 300 mL (standard, open format) |
| Titration | colorimetric (RGB sensor), variable speed, simultaneous with distillation |
| Burette volume | 5 / 10 / 25 mL |
| Burette resolution | 1.0 µL/step; 0.2 / 0.4 µL/step optional |
| Distillation modes | alkali then distillation, or distillation then alkali; delay function |
| Steam flow | adjustable 0–100 % |
| Dosing | plunger dosing pump, diaphragm filling pumps |
| Methods and units | unlimited methods, 15 result units |
| Data memory | 1 million results; PDF / XML export to USB |
| Data integrity | 21 CFR Part 11: user levels, audit trail, password ageing (included) |
| Display | 10″ HD touchscreen, Android |
| Interfaces | USB, LAN, RS232, CAN, Wi-Fi; PC and balance connection |
| Cooling water consumption | 0.5 L/min (metal condenser) |
| Monitoring | condensate temperature, online titration curve, result limit alarm |
| Autosampler | KJELFASTER-A24 (optional) |
| Power supply | 220 V AC ±10 %, 50 Hz |
| Rated power | 2 kW |
| Dimensions (W×D×H) | 460 × 360 × 725 mm |
| Weight | 38 kg |
OPTIONS AND ACCESSORIES
Options and accessories for the KJELFASTER-K900
Standard delivery is confirmed in the quotation. The built-in automatic burette is part of the analyzer (volume selected with the order); the KJELFASTER-A24 autosampler, the 0.2 / 0.4 µL/step option, digestion tubes, catalyst tablets and reagents are ordered separately; KJELDIG digestors and the EXSC5 scrubber complete the system.
PRO7166
KJELFASTER-A24 autosampler
24 positions, separate cleaning position, 4 × 15 L reagent tanks (approx. 500 analyses per fill).
Optional
PRO7167
KJELDIG-D520 automatic Kjeldahl digestor
20 × 300 mL, RT+5–450 °C ±1 °C, automatic rack lift, touchscreen, >500 methods, 21 CFR Part 11, Wi-Fi/USB; controls the scrubber. On request.
Optional
PRO3575
KJELDIG-D250 Kjeldahl digestor
20 × 300 mL, up to 450 °C, ±1 °C, 10 programs × 5 steps; fume hood included.
Optional
PRO3576
KJELDIG-D450 infrared Kjeldahl digestor
Infrared + graphite, 400 °C in 25 min, 20 programs; hood and cooling rack included.
Optional
PRO5814
EXSC5 scrubber
Three-stage neutralization: water condensation, alkali, activated carbon; adjustable suction.
Optional
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Digestion tubes φ42 × 300 mL (set)
Standard open-format tubes for all KJELDIG digestors and KJELFAST / KJELFASTER units — one tube from digestion to distillation.
Optional
More options and consumables
- Built-in automatic burette
- High-resolution titration 0.2 / 0.4 µL/step
- Reagent tanks (spare)
- Kjeldahl catalyst tablets
- Reagents: sulfuric acid, NaOH 40 %, boric acid with indicator, standard acid
Digestion tubes, reagents and spare parts on request. Full catalogue: Organic elemental analysis catalogue →
Selection guidance
KJELFASTER-K900 is selected by accredited and high-throughput laboratories that need unattended operation, audit-ready data and the finest burette resolution in the KJELFASTER range. For routine work without data-integrity requirements choose K700 or K500.
Configuration checklist
- Throughput: manual loading, or the 24-position A24 for unattended batches.
- Burette: 1.0 µL/step standard; 0.2 / 0.4 µL/step for low-nitrogen samples.
- Compliance: 21 CFR Part 11 users and audit trail — user roles are defined at installation.
- Digestion: KJELDIG-D520 automatic digestor for a fully unattended line, or KJELDIG-D450 / D250 with EXSC5 scrubber.
Sales and support for international customers
COLO Lab ExpertsPolje ob Sotli 4, SI-3255 Buče, Slovenia
Phone: +386 70 713 437 · Email: sales@colo.si · Web: colo.si
We supply laboratories across Europe directly and through partners. B2B prices are quoted net, excluding VAT.
