I. Key Performance Features of the LCHS-20N Automatic Headspace Sampler:

Equipped with a 7-inch touch color screen, functions such as automatic pressure application, sampling, sample introduction, analysis, and reverse-blow cleaning are achieved through time programming.

2. Up to 20 overhead bottle filling stations, with fast heating speed, high temperature control accuracy, and small temperature gradient.

3. The screen displays the progress status, job type status, and work prompt functions, greatly facilitating user operation and use.

4. Equipped with an external gas regulation system, no modifications or adjustments are needed for the GC instrument to perform headspace sampling analysis. Additionally, you can opt to use the original instrument's carrier gas, making the installation process very simple.

5. Utilizing pressure balance sampling technology, headspace sampling achieves a symmetrical narrow chromatogram peak shape.

6. Transmission pipes and sample valves feature automatic backblowing functionality, which prevents sample residue and cross-contamination.

7. Optional elastic quartz tubes are available for sample conveyance in active substance analysis.

8. Adjust the sample injection volume at any time according to the concentration of the sample the customer wants to analyze.

9. Easy to replace sample needle, compatible with all GC injection ports from both domestic and international models.

10. The overall structural design is rational, aesthetic, generous, and practical.

11. Microcomputer program control with main functions including:

⑴ Method parameter settings, real-time working status, three-way temperature control, and running times for each.

Sample area, inlet valve system, and sample transfer tube, all three are heated and temperature-controlled individually.

③ Set up the control program and press the start button to automatically complete the sample analysis.

④ The chromatography instrument and the workstation can be started synchronously, or this device can be initiated by external programs.

II. Technical Specifications:

Sample Area Temperature Control Range:

Room temperature — 300°C; adjustable by increments of 1°C; heating power 600W.

2. Valve Feed System Temperature Control Range:

Room temperature — 180°C; adjustable in increments of 1°C; heating power: 120W.

3. Sample transmission pipeline temperature control range:

Room temperature — 180°C; adjustable in increments of 1°C; heating power approximately 100W.

For operational safety, the temperature control of the transmission pipeline is powered by a 24V low-voltage supply.

4. Temperature Control Accuracy: < ±0.5℃

5. Temperature control gradient: < ±0.5℃

6. Headspace Bottle Station: 20 units

7. Headspace Bottle Specifications: Available in 20ml and 10ml (50ml and other sizes available for customization)

8. Repeatability: RSD ≤ 3% (200 ppm ethanol in water)

9. Sample Quantity Control Mode: Sample time and pressure control for sample quantity.

10. Sample Pressure Range: 0～0.4 Mpa (Continuous Adjustment)

11. Backflush cleaning flow rate: 0-400 ml/min (continuously adjustable)

12. Effective Dimensions of Instrument: 420×220×380mm

13. Instrument weight: approximately 15 kg.