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| Brand | Huake Instrument |
|---|---|
| Model | HK-338 |
| Origin | Beijing, China |
| Enclosure | Die-cast aluminum housing |
| Display | 192 × 64 dot-matrix LCD (Chinese/English selectable) |
| Conductivity Range | 0.000–2.000 μS/cm (K=0.01), 0.00–20.00 μS/cm (K=0.1), 0.0–200.0 μS/cm (K=1.0), 0.000–2.000 mS/cm (K=10.0) |
| Resolution | 0.001 μS/cm (conductivity), 0.1 ℃ (temperature) |
| Accuracy | ±1.5% FS (conductivity), ±0.5 ℃ (temperature) |
| Temperature Compensation | Automatic (ATC: 0.1–60.0 ℃) or manual |
| Measurement Principle | Four-wire conductivity measurement (eliminates lead resistance effects) |
| Output | Two isolated 4–20 mA (or 0–10/0–20 mA) analog outputs |
| Communication | RS-485 (Modbus RTU), optional Profibus DP or HART protocol |
| Data Logging | Internal storage for historical conductivity & temperature data with trend curve recall |
| Sample Temp. | 5–50 ℃ |
| Max. Flow Rate | ≤6 L/h |
| Suspended Solids Limit | ≤5 μm (no colloids or oils) |
| Ambient Operating Temp. | 5–45 ℃ |
| Relative Humidity | ≤90% RH (non-condensing) |
| Power Supply | AC 100–240 V, 50–60 Hz |
| Power Consumption | 8 W |
| Dimensions | 146 × 146 × 154 mm (W × H × D) |
| Panel Cutout | 139 × 139 mm |
| Weight | 2 kg |
| Compliance | Designed for industrial process environments per IEC 61000-6-2 (EMC immunity) and IEC 61000-6-4 (EMC emission) standards |
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