'/%3E%3C/svg%3E){kind=small}
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.
Complete your Kjeldahl system
Selection, commissioning and service support
Choosing a laboratory instrument is easier when the application is clear from the start. Tell us what kind of samples you measure, how many per day, which range and accuracy you need and which standards or internal procedures you follow. Based on that, our team recommends a suitable configuration together with the accessories and consumables that make sense for routine work, so you do not pay for options you will never use.
After delivery we stay available for practical questions: first start-up, calibration routine, daily care, storage and typical operator mistakes that shorten the life of sensors and wearing parts. If results begin to drift or the device reports an error, describe the symptoms and we will suggest what to check first before any repair is considered.
Spare parts, replacement sensors and calibration materials can be ordered later through the same contact. For a quotation or technical advice, use the request button on this page and add a short description of your application.
