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| Brand | Zhongkehuifen (ZK-HG) |
|---|---|
| Origin | Beijing, China |
| Type | Oil-Free Laboratory Air Generator |
| Output Flow | 0–3 L/min |
| Output Pressure | 0–0.4 MPa (adjustable) |
| Air Purity | Oil-free, Triple-Stage Purification |
| Noise Level | ≤30 dB(A) |
| Power Rating | 150 W |
| Protection | Overpressure, Overcurrent, Overtemperature |
| Construction | Fully Enclosed Compressor, Vibration-Free Operation |
| Brand | ZHONGKEHUIFEN |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | Tri-Gas Generator System |
| Nitrogen Purity | 99.999% (O₂ < 1 ppm) |
| Hydrogen Purity | 99.999% (O₂ < 1 ppm) |
| Air Purity | Oil-free, Class 1 compressed air per ISO 8573-1:2010 |
| Nitrogen Output Pressure | 0.4 MPa |
| Hydrogen Output Pressure | 0.3 MPa |
| Air Output Pressure | 0.4 MPa |
| Nitrogen Flow Rate | 0–300 mL/min |
| Hydrogen Flow Rate | 0–300 mL/min |
| Air Flow Rate | 0–2 L/min |
| Input Power | AC 220 V, 50 Hz |
| Operating Temperature | 0–40 °C |
| Relative Humidity | <85% RH (non-condensing) |
| Brand | Zhongkehuifen |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | H2-300 |
| Output Purity | 99.99% (v/v, O₂-equivalent) |
| Flow Rate | 0–300 mL/min |
| Input Voltage | AC 220 V, 50 Hz |
| Operating Temperature | 10–40 °C |
| Relative Humidity | <85% RH |
| Max Power Consumption | 210 W |
| Brand | ZHONGKEHUIFEN |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Country of Manufacture | China |
| Model | GC-7820 |
| Pricing | Available Upon Request |
| Brand | Zhongkehuifen |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Model | 5B-3A |
| Detection Range | 20–1500 mg/L COD |
| Digestion Temperature | 165 °C ±1.0 °C |
| Digestion Time | 10 min |
| Measurement Time | 20 min for up to 9 samples |
| Chloride Interference Tolerance | ≤1000 mg/L (standard), ≤4000 mg/L (with high-chloride correction) |
| Repeatability | ≤0.03% RSD |
| Optical Stability | 0.01 A / 5 min |
| Built-in Calibration Curves | 20 (user-editable and savable) |
| Data Storage Capacity | 1000 records (including parameter ID, timestamp, and value) |
| Display | Integrated LCD |
| Connectivity | RS232 or USB for data export |
| Printer | Built-in thermal printer |
| Brand | ZHONGKEHUIFEN |
|---|---|
| Origin | Shanghai, China |
| Model | AKF-2010 |
| Moisture Range | 0.001–100% w/w |
| Resolution | 1 µg H₂O |
| Repeatability | ≥99.7% (at 10 mg water) |
| Max Error | ±0.3% |
| Titration Speed Control | 0.5 µL–0.1 mL adjustable |
| Display | 5.6" TFT LCD (640×480 px) |
| Data Storage | 100,000+ records (expandable) |
| Electrode | Dual-platinum electrode |
| Valve & Tubing Material | FEP-coated electromagnetic 3-way valve |
| Operating Temp | 5–40 °C |
| Humidity Limit | ≤80% RH |
| Power | 220 V / 50 Hz / 50 W |
| Interface Options | RS-232C, USB, Ethernet (Web-enabled) |
| Brand | ZHONGKEHUIFEN |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Authorized Distributor |
| Country of Manufacture | China |
| Model | AAS6000 |
| Price | Upon Request |
| Wavelength Range | 190–900 nm |
| Monochromator Type | Czerny-Turner |
| Spectral Bandwidth | 0.1 / 0.2 / 0.4 / 0.7 / 1.4 nm (5-step auto-switching) |
| Grating Blaze Wavelength | 230 nm |
| Grating Line Density | 1800 lines/mm |
| Wavelength Accuracy | ±0.25 nm |
| Wavelength Repeatability | <0.10 nm |
| Optical Resolution | <0.3 nm |
| Characteristic Concentration (Cu) | <0.025 µg/mL per 1% absorption |
| Detection Limit (Cu) | <0.006 µg/mL |
| Precision (Cu) | <0.8% RSD |
| Baseline Stability | 0.003 Abs (static), 0.004 Abs (dynamic) |
| Background Correction | D₂ Lamp + Self-Reversal Method |
| Atomization System | Titanium Nebulizer Chamber & Burner Head |
| Nebulizer | Custom Wirsching-type Glass Nebulizer |
| Fuel Control | Continuously Adjustable Acetylene Flow with Real-time Monitoring |
| Communication Interface | USB 2.0 |
| Software Interface | Windows-based, Bilingual (EN/CN), Fully Automated Qualitative & Quantitative Analysis |
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