COLO.Science · Concentration & Evaporation · Nitrogen sample concentrators
SACO200 nitrogen sample concentrator — a valve on every needle, RT+5 °C to 160 °C, 12 or 24 tubes
The SACO200 nitrogen sample concentrator evaporates solvent from many tubes at once: an aluminium dry block warms the samples while nitrogen from stainless steel needles sweeps the vapour off the liquid surface, without oxygen and without a water bath. The block is controlled from RT+5 °C to 160 °C to ≤ ±0.5 °C at 40 °C, and every needle has its own valve. SACO200-1 takes one block with 12 positions (PRO4598), SACO200-2 two blocks with 24 (PRO4599).
Every sample blown independently
Samples in one run are rarely alike: different volumes, different solvents, some finished long before the others. With one gas flow for all needles the fast ones go dry while the slow ones are still half full. On the SACO200 nitrogen sample concentrator every needle has its own valve, so the flow is set tube by tube and a finished position is simply closed.
Key characteristics
- RT+5 °C to 160 °C, display resolution 0.1 °C.
- Accuracy ≤ ±0.5 °C at 40 °C and ≤ ±1 °C at 120 °C; uniformity ≤ ±0.5 °C.
- Heating from 25 °C to 160 °C in ≤ 15 min.
- A valve on every needle — each sample has its own gas flow.
- One block or two — 12 or 24 tubes; head travel 200 mm.
- Nitrogen up to 15 L/min at 0.1 MPa.
- 7 interchangeable blocks for Ø 10 mm to Ø 20 mm tubes, 12 positions each.
- Fault alarm, temperature calibration and over-temperature protection.
Suitable for
- Residue analysis — pesticides, mycotoxins and veterinary drugs before GC and LC.
- Concentration of SPE eluates.
- Extracts of food, water and soil samples.
- Solvent removal from pharmaceutical and biological extracts.
- Evaporation to dryness and solvent exchange.
Why nitrogen blow-down in a dry block
The SACO200 nitrogen sample concentrator evaporates below the boiling point and under inert gas, so heat-sensitive and oxidisable analytes are spared. The aluminium block replaces the water bath: nothing to fill, no water vapour over the samples, and temperatures above 100 °C when the solvent needs them.
The valve on each needle saves nitrogen on empty positions and keeps finished samples from being blown dry, and the head follows the liquid level down as the volume falls.
Models, product codes and blocks
The SACO200 nitrogen sample concentrator is made in two models that differ in the number of blocks. Both are supplied without blocks; the blocks are ordered separately. Quote and order with the COLO product code.
1 block · 12 tubes · 300 W · 6.0 kg
2 blocks · 24 tubes · 500 W · 7.5 kg
Interchangeable blocks
| PRO4600 | 12 × Ø 10 mm |
| PRO4601 | 12 × Ø 12 mm |
| PRO4602 | 12 × Ø 13 mm |
| PRO4603 | 12 × Ø 15 mm |
| PRO4604 | 12 × Ø 16 mm |
| PRO4605 | 12 × Ø 19 mm |
| PRO4606 | 12 × Ø 20 mm |
SACO200-2 takes two blocks, which may be of different formats. A flow control valve is available as PRO4597.
Technical specifications
Temperature and time
| Temperature setting range | 0 °C to 160 °C |
| Temperature control range | RT+5 °C to 160 °C |
| Temperature accuracy | ≤ ±0.5 °C at 40 °C · ≤ ±1 °C at 120 °C |
| Temperature uniformity | ≤ ±0.5 °C |
| Display resolution | 0.1 °C |
| Heating time | ≤ 15 min, 25 °C to 160 °C |
| Time range | 1 min to 99 min 59 s, or continuous |
| Maximum vertical travel | 200 mm |
Nitrogen and general data
| Nitrogen flow rate | up to 15 L/min |
| Nitrogen pressure | 0.1 MPa |
| Gas control | Valve on every needle |
| Blocks · positions | SACO200-1: 1 · 12 — SACO200-2: 2 · 24 |
| Power | SACO200-1: 300 W · SACO200-2: 500 W |
| Voltage | AC 220 V, 50/60 Hz (AC 110 V on request) |
| Dimensions (W × D × H) | 260 × 220 × 475 mm |
| Weight | SACO200-1: 6.0 kg · SACO200-2: 7.5 kg |
How a run works
Block and temperature
Fit the block for your tubes and set the temperature. The SACO200 nitrogen sample concentrator heats the block.
Load and blow
Place the tubes, lower the head until the tips are just above the liquid and close the valves of empty positions. Open the nitrogen, set the flow at each valve so that the surface dimples without splashing, and start the timer.
End of run
Lower the head as the level drops and close each valve when its sample is done. At the end close the gas, raise the head and take the tubes out.
Needle head, valves and safe operation
The needle head of the SACO200 nitrogen sample concentrator carries one stainless steel needle per position, each with a valve on top of the head. The head runs on a stand with rack-and-pinion height adjustment and a locking knob.
Use dry, oil-free nitrogen through a pressure regulator at 0.1 MPa. Work in a fume hood — solvent vapour leaves the tubes with the gas. The block is hot during the run; fault detection with alarm and over-temperature protection are built in.
Standard delivery
- SACO200 nitrogen sample concentrator, model SACO200-1 or SACO200-2.
- Stand with height adjustment.
- Needle head with needles and valves; gas hose.
- Mains cable and operating manual.
- Declaration of conformity and warranty documentation.
Blocks are ordered separately under their own product codes. Nitrogen supply, pressure regulator, tubes and samples are not part of the instrument. The delivered configuration for a specific order is the one confirmed in the COLO.Science quotation.
Knowledge base
Sample concentration and evaporation on COLO.Science — our knowledge base.
Applications and operational value
The SACO200 nitrogen sample concentrator is used in food safety, environmental, pharmaceutical, forensic and clinical laboratories wherever extracts have to be concentrated before chromatography or mass spectrometry.
It is a nitrogen blow-down concentrator, not a vacuum centrifugal concentrator: it suits organic solvents in open tubes and needs a nitrogen supply and a fume hood, but no vacuum pump.
Selection guide
- Tubes. The outer diameter decides the block; the number per run decides the model.
- One block or two. SACO200-1 for 12 tubes, SACO200-2 for 24 or for two tube formats at once.
- Temperature. The evaporation temperature must lie within RT+5 °C to 160 °C.
- Nitrogen. Cylinder or generator with regulator, 0.1 MPa and up to 15 L/min.
- More tubes or larger tubes? The SACO100 takes up to 48 tubes and diameters up to 40 mm.
- Place of use. The SACO200 nitrogen sample concentrator needs 260 × 220 mm in a fume hood and is 475 mm high.
Configuration notice
This page is provided for orientation and product selection. It does not replace the binding specification, the delivered configuration, the validation protocol or the acceptance criteria confirmed in the official COLO.Science quotation, proforma invoice or order confirmation. Confirm the model, the blocks and the mains voltage version of the SACO200 nitrogen sample concentrator for the specific order. B2B prices are quoted net, excluding VAT.
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.
