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| Brand | Jilin University-Xiaotianshe |
|---|---|
| Origin | Jilin, China |
| Manufacturer Type | Direct Manufacturer |
| Region of Manufacture | Domestic (China) |
| Model | GDYK-501RC |
| Instrument Type | Portable |
| Operating Principle | Spectrophotometry |
| Detection Parameters | Formaldehyde (HCHO), Benzene Homologues, Total Volatile Organic Compounds (TVOC), Ammonia (NH₃) |
| Detection Limits (mg/m³) | 0.01 (HCHO), 0.05 (Benzene Homologues), 0.05 (TVOC), 0.10 (NH₃) |
| Measurement Ranges (mg/m³) | 0.00–2.00 (HCHO), 0.00–1.00 (Benzene Homologues), 0.00–4.00 (TVOC), 0.00–5.00 (NH₃) |
| Light Sources | 630 nm (HCHO), 465 nm (Benzene/TVOC), 430 nm (NH₃) |
| Analytical Methods | National Standard Phenol Reagent Method (HCHO), Colorimetric Methods (Benzene/TVOC), National Standard Nessler’s Reagent Method (NH₃) |
| Accuracy | ±5% FS |
| Display | 5-inch TFT color touchscreen + 2.9-inch e-ink auxiliary display |
| Connectivity | USB, RS232, RS485 (optional), Bluetooth (for wireless printing) |
| Power Supply | Rechargeable Li-ion battery + AC/DC adapter |
| Data Storage | Internal non-volatile memory with conditional search capability |
| Brand | Jiada Xiaotianshe |
|---|---|
| Origin | Jilin, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | GDYK-800M |
| Instrument Type | Portable |
| Measurement Principle | Spectrophotometry |
| Display | 12-inch multi-touch LCD |
| Connectivity | Ethernet, USB, Wi-Fi, 4G |
| Power Supply | AC/DC dual-mode |
| Light Source | High-brightness LED |
| Wavelengths | 630 nm (formaldehyde, TVOC), 430 nm (ammonia), 465 nm (benzene & homologues, TVOC) |
| Detection Limits | Formaldehyde 0.01 mg/m³, Ammonia 0.10 mg/m³, Benzene & Homologues 0.05 mg/m³, TVOC 0.05 mg/m³ |
| Measurement Ranges | Formaldehyde 0.00–2.00 mg/m³, Ammonia 0.00–5.00 mg/m³, Benzene & Homologues 0.00–1.00 mg/m³, TVOC 0.00–4.00 mg/m³ |
| Accuracy | ±5% |
| Sample Cell | 19 mm cylindrical glass cuvette and 50 mm rectangular glass cuvette |
| Operating Temperature | 5–40 °C |
| Built-in Thermal Printer | Yes |
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