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| Brand | ENTECH |
|---|---|
| Origin | USA |
| Model | 7200H+4700H |
| Application | Trace-level impurity preconcentration for high-purity hydrogen fuel analysis |
| Cooling Method | Liquid nitrogen–cooled single-stage cryogenic trap |
| Sample Line Treatment | Silica-fused inertized tubing |
| Volume Measurement | EVC (Electronic Volume Control) technology |
| Compliance | ASTM D7652, GB/T 37244–2018, GB/T 44243–2024, T/CECA-G 0180–2022 |
| Brand | ENTECH |
|---|---|
| Origin | USA |
| Model | 4700 |
| Dilution Range | ppb to sub-ppt |
| Maximum Total Dilution Factor | 10,000× |
| Pressure Sensor Accuracy | ±0.05% FS |
| Standard Configuration | 6-Channel Dilution |
| Calibration Method | Gravimetric (NIST-traceable) |
| Regulatory Compliance | EPA TO-15, ASTM D6420, ISO 16017-1 |
| System Pathway | Ultra-Inert (SilcoNert®/Sulfinert®-treated stainless steel) |
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