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| Brand | Leshi |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Regional Classification | Domestic (China) |
| Model | SE307 |
| Instrument Type | Portable |
| Detection Principle | TDLAS (NH₃-specific 1.53 µm wavelength) |
| Minimum Detectable Concentration | <50 ppb |
| Response Time (T90) | <2 s |
| Optical Path Length | 30 m (multi-pass cell) |
| Wavelength Stability | Real-time peak-locking via integrated NH₃ reference cell |
| Output Interface | Digital RS-485 / USB |
| Data Storage | Internal SD card (≥16 GB) |
| Operating Temperature | −10 °C to +50 °C |
| Power Supply | Rechargeable Li-ion battery (≥8 h continuous operation) |
| Compliance | CE-marked, RoHS-compliant, meets IEC 61000-4 EMC immunity requirements |
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