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| Brand | Bigdipper |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | HBD5ms2100 sMS |
| Water Activity Range | 0.000–1.000 aw |
| Accuracy | ±0.015 aw |
| Repeatability | ±0.005 aw |
| Resolution | 0.001 aw |
| Moisture Content Range | 0.0–100.0% (w/w) |
| Moisture Accuracy | ±2.0% abs |
| Moisture Repeatability | ±0.5% abs |
| Moisture Resolution | 0.1% |
| Operating Temperature | −20 to +85 °C (moisture extension up to 200 °C) |
| Environmental Operating Range | −10 to +60 °C, 0–99% RH |
| Test Modes | Rapid, Pre-cut, Equilibrium |
| Typical Rapid Test Time | 3–5 min |
| Power Supply | Rechargeable NiCd battery (HBD5 variant), 24 h continuous operation, 1 week standby |
| Intrinsic Safety Rating | Ia, suitable for Class 1, Groups A/B/C/D and Class 2, Groups E/F/G hazardous locations |
| Enclosure Rating | NEMA 2 |
| Data Storage | Non-volatile memory (2 MB), power-loss protected |
| Communication Interface | RS-232 / RS-485 |
| Sensor Architecture | Polymer-based capacitive humidity sensor with integrated temperature compensation |
| Calibration | Factory-calibrated |
| Brand | Bigdipper |
|---|---|
| Origin | Beijing, China |
| Manufacturer | Bigdipper Industrial Chemistry Research Institute |
| Model | HBD5-MS2100 sWA |
| Measurement Range | 0.003–0.999 a<sub>w</sub> |
| Accuracy | ±0.003 a<sub>w</sub> (at <0.1°C ambient) |
| Repeatability | ±0.015 a<sub>w</sub> (at <±0.3°C ambient) |
| Resolution | 0.001 a<sub>w</sub> |
| Sensor Type | Imported high-precision ERH sensor |
| Sample Chamber Diameter | 48 mm |
| Host Dimensions | 180 × 70 × 50 mm |
| Host Weight | 0.4 kg |
| Power Supply | Rechargeable Ni-Cd battery (2 h continuous operation, 1 week standby) or 220 V AC adapter |
| Operating Environment | 0–50°C, 0–85% RH |
| Compliance | GB/T 34790–2017 |
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