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| Brand | Hengmei |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | OEM Manufacturer |
| Region | Domestic (China) |
| Model | HM-550 |
| Price | USD 25,000 (FOB Qingdao) |
| Measurable Elements | Na (11) to U (92) |
| Dimensions | 700 mm × 510 mm × 336 mm |
| Weight | 56 kg |
| Vacuum Chamber Dimensions | 400 mm × 340 mm × 80 mm |
| Operating Temperature | 15–30 °C |
| Relative Humidity | 40–70 % RH |
| Power Supply | AC 220 V ±5 V, 50/60 Hz |
| Detection Limit (RoHS elements) | 1 ppm |
| Measurement Time | 100–300 s (user-adjustable) |
| Energy Resolution | 129 ±5 eV (Mn Kα) |
| Detector | Silicon Drift Detector (SDD), Peltier-cooled |
| X-ray Tube | Max. 50 kV / 1 mA, tungsten anode |
| Vacuum Pump | 60 L/min, ultimate pressure 6.7×10⁻² Pa |
| Collimator Options | 7 fixed apertures (2–8 mm diameter) |
| Filter Options | 5 automatic filters |
| Spectral Channels | 4096-channel digital MCA |
| Interface | USB 2.0 |
| Brand | Hengmei |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Automated Kjeldahl Nitrogen Determinator |
| Automation Level | Fully Automated |
| Nitrogen Measurement Range | 0.1–240.0 mg N |
| Repeatability | ≤0.5% RSD (parallel determinations) |
| Sample Weight Capacity | ≤8.0 g (solid), ≤30.0 mL (liquid) |
| Nitrogen Recovery Rate | 99–101% |
| Power Consumption | ≤1500 W |
| Brand | Hengmei |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Model | HM-MD |
| Spectral Bandwidth | 4 nm (2 nm optional) |
| Wavelength Accuracy | ±1 nm |
| Wavelength Range | 190–1100 nm |
| Photometric Range | 0–200% T, −0.3–3 A |
| Stray Light | ≤0.1% T |
| Photometric Accuracy | ±0.5% T, ±0.004 Abs (0–0.5 A) |
| Photometric Repeatability | ±0.5% T, ±0.004 Abs (0–0.5 A) |
| Baseline Stability | ±0.002 Abs at 500 nm (3 min) |
| Detector | Imported Silicon Photodiode |
| Monochromator | Czerny-Turner with Holographic Blazed Grating (1200 lines/mm) |
| Display | 7-inch TFT-LCD Touchscreen (1024 × 768) |
| Connectivity | USB, Wi-Fi (standard), Bluetooth (standard), optional PC software (Yokelab), cloud integration via YOKE@Clouddata |
| Data Storage | 2000 spectra, 96 calibration curves |
| Scan Speed | up to 3000 nm/min |
| Lamp Switching | Automatic (default 340 nm, user-configurable) |
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