Kjeldahl range
COLO.Science — Organic elemental analysis · Kjeldahl
KJELFAST-K300 Kjeldahl Distillation Unit
KJELFAST-K300 is an automatic Kjeldahl steam distillation unit for nitrogen and protein determination from 0.1 to 240 mg N with recovery ≥99.5 %. It doses dilution water, alkali and boric acid automatically, distils a sample in 3–6 min, washes the alkali line and stops safely on over-temperature, over-pressure or loss of cooling water. The distillate is titrated manually or with a separate titrator — an economical entry into the classical Kjeldahl method.
Overview
Applications
- Protein and nitrogen: crude protein and total nitrogen in food, feed and agricultural samples.
- Water and soil: total Kjeldahl nitrogen (TKN) and ammonium nitrogen in water and soil digests.
- Volatile compounds: ammonium, volatile bases and volatile fatty acids by steam distillation.
- Teaching and small labs: low sample numbers with manual or separate titration.
Why KJELFAST-K300
- Low running cost: 1.3 kW power, standard φ42 mm × 300 mL tubes and open consumables — no proprietary glassware.
- Automatic dosing: dilution water, alkali and boric acid are dosed automatically; each flow can be calibrated.
- Safe operation: over-temperature and over-pressure protection, cooling water control and emergency stop.
- Support: installation, operator training and method validation on your sample by COLO.Science.
Technical specifications
| Model | KJELFAST-K300 |
| SKU | PRO3574 |
| Instrument type | Kjeldahl steam distillation unit (without titration) |
| Measuring range | 0.1–240 mg N |
| Recovery | ≥99.5 % |
| Time per sample | 3–6 min per sample |
| Sample size | solid ≤6 g, liquid ≤16 mL |
| Digestion tubes | φ42 mm, 300 mL (standard, open format) |
| Operating mode | manual / automatic |
| Dosing | dilution water, alkali, boric acid (automatic) |
| Calibration | dilution water, alkali, boric acid and washing flow |
| Distillation time | freely editable, alarm at the end |
| Cleaning | automatic alkali line washing |
| Cooling water consumption | 1.5 L/min |
| Cooling water control | intelligent, automatic |
| Safety functions | over-temperature and over-pressure protection, emergency stop |
| Display | 4.3″ colour LCD |
| Test mode | built-in |
| Power supply | 220 V AC ±10 %, 50 Hz |
| Rated power | 1.3 kW |
| Dimensions (W×D×H) | 400 × 385 × 735 mm |
| Weight | 30 kg |
OPTIONS AND ACCESSORIES
Options and accessories for the KJELFAST-K300
Standard delivery is confirmed in the quotation. Digestion is done in a KJELDIG-D250 or KJELDIG-D450 digestor with the EXSC5 scrubber; catalyst tablets and reagents are ordered separately.
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
—
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
- 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
KJELFAST-K300 is selected when a laboratory needs reliable automatic Kjeldahl distillation at the lowest investment and running cost. For integrated titration and printout choose KJELFASTER-K500 or K700; for unattended operation and 21 CFR Part 11 the KJELFASTER-K900.
Configuration checklist
- Sample number: occasional to routine — for integrated titration choose K500 / K700.
- Sample type: solid ≤6 g or liquid ≤16 mL per tube.
- Digestion: 20-position KJELDIG digestor and EXSC5 scrubber.
- Utilities: cooling water tap, drain and 220 V socket next to the bench.
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.
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