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| Brand | Huake Instrument |
|---|---|
| Origin | Beijing, China |
| Model | HK-328 |
| Display | 192 × 64 dot-matrix LCD (Chinese/English selectable) |
| pH Range | 0.00–14.00 pH |
| ORP Range | −1000 to +1000 mV |
| Temperature Range | 0.00–99.9 °C |
| ATC Range | 0.1–60.0 °C |
| pH Resolution | 0.01 pH |
| mV Resolution | 0.1 mV |
| Temp. Resolution | 0.1 °C |
| pH Accuracy | ±0.05 pH |
| Temp. Accuracy | ±0.5 °C |
| Response Time (T90) | 90 s at 25 °C |
| Output | Dual isolated 4–20 mA (or 0–10 mA / 0–20 mA), configurable for pH or temperature |
| Max. Load | 800 Ω @ 20 mA |
| Alarm Outputs | 2 programmable relay outputs |
| Communication | RS-485, Profibus DP, HART |
| Sample Temp. | 5–50 °C |
| Sample Flow Rate | 6 L/h |
| Max. Suspended Solids | ≤5 µm (no colloids or oils) |
| Ambient Temp. | 5–45 °C |
| Humidity | ≤90% RH (non-condensing) |
| Storage Temp. | −20 to +55 °C (electrode stored separately >0 °C) |
| 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 |
| Brand | Huake Instrument |
|---|---|
| Origin | Beijing, China |
| Model | HK-1309pH |
| Measurement Principle | Conductivity-based pH calculation (VGB-R 450L compliant) |
| pH Range | 7.5–11.5 |
| Cation Conductivity Range | 0.000–200.0 µS/cm (with selectable cell constants: 0.01, 0.1, 1.0 cm⁻¹) |
| Resolution | 0.001–0.1 µS/cm (dependent on range) |
| Ammonia Range | 0.01–10 ppm |
| Temperature Compensation | Linear, neutral salt, ammonia water, strong acid modes |
| Compliance | HK-338 Enterprise Standard, JJG 376–2007 Verification Regulation for Conductivity Meters |
| System Integration | Integrated stainless-steel panel with flow cell, cation exchange column, regeneration unit, solenoid valves, and dual-conductivity sensors |
| Brand | Huakeyi |
|---|---|
| Origin | Beijing, China |
| Model | HK-6010 |
| Measurement Range | pH 2.00–11.00 |
| Temperature Range | 0.00–99.9 °C |
| ATC Range | 0.1–60 °C |
| pH Resolution | 0.01 pH |
| Temperature Resolution | 0.1 °C |
| pH Accuracy | ±0.1 pH |
| Temperature Accuracy | ±0.5 °C |
| Output Signals | Isolated 0–10 mA / 0–20 mA / 4–20 mA (±1% FS) |
| Sample Temp. | 5.0–50.0 °C |
| Max. Sample Pressure | <0.6 MPa |
| Ambient Temp. | 5–50 °C |
| Humidity | ≤95% RH |
| Dimensions (Enclosure) | 300 mm × 400 mm × 200 mm (W×H×D) |
| Power Supply | AC 100–240 V, 50–60 Hz |
| Power Consumption | ≤40 W |
| Dielectric Strength | 1500 VAC for 1 min |
| Brand | Huake Instrument |
|---|---|
| Model | HK-328W |
| Enclosure | Die-cast aluminum, ESD-safe |
| Display | 192 × 64 dot-matrix LCD (Chinese/English selectable) |
| pH Range | 0.00–14.00 pH |
| mV Range | −1000 to +1000 mV |
| Temperature Range | 0.00–99.9 °C (ATC: 0.1–60.0 °C) |
| pH Resolution | 0.01 pH |
| mV Resolution | 0.1 mV |
| Temp. Resolution | 0.1 °C |
| pH Accuracy | ±0.1 pH |
| Temp. Accuracy | ±0.5 °C |
| Output | Dual isolated 4–20 mA (or 0–10 mA / 0–20 mA), ±1% FS, load ≤800 Ω |
| Alarm Outputs | 2 relay outputs |
| Communication | RS485, Profibus DP, HART |
| Sample Temp. | 0.0–60.0 °C |
| Max. Sample Pressure | <0.6 MPa |
| Ambient Temp. | 5–60 °C |
| Humidity | ≤95% RH |
| Storage Temp. | −25–55 °C (electrode storage >0 °C) |
| Power | AC 100–240 V, 50–60 Hz |
| Power Consumption | 8 W |
| Dimensions | 158 × 158 × 170 mm (W×H×D) |
| Panel Cutout | 139 × 139 mm |
| Weight | 2 kg |
| Electrode Type | Wastewater-compatible triple-junction composite pH electrode (standard 10 m or optional 20 m cable) |
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