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| Brand | Keyuan Instruments |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | KY-100 (6-position) |
| Digestion Method | Rapid Reflux Digestion |
| Heating Module | Precision Ceramic Heating Block |
| Batch Capacity | 6 samples simultaneously |
| Temperature Range | 25–170 °C (adjustable, ±1 °C accuracy) |
| Digestion Vessel Capacity | 250 mL conical flasks with reflux condensers |
| Timer Accuracy | ±1 second over full 180-minute range |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Rated Power | 1500 W |
| Ambient Operating Temperature | 5–40 °C |
| COD Measurement Range | 16–700 mg/L (dilutable for higher concentrations) |
| Analytical Precision | RSD ≤5.0% for potassium hydrogen phthalate standard (500 mg/L) |
| Compliance | HJ 828–2017 (replacing GB 11914–1989), aligned with ISO 6060 principles |
| Brand | Kyoyuan |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | KY-1005 |
| Digestion Method | Reflux Digestion |
| Heating Module | Integrated Ceramic Heating Block |
| Batch Capacity | 5 × 250 mL Erlenmeyer Flasks |
| Temperature Setpoint | 165 °C (per GB 11914–1989 and ISO 6060) |
| Temperature Accuracy | ±1 °C at 165 °C |
| Timer Range | 0–999 min |
| COD Measurement Range | 0–1000 mg/L (direct), 0–10000 mg/L (after dilution) |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Rated Power | 1300 W |
| Ambient Operating Temperature | 5–40 °C |
| Cooling Method | Forced-air convection (no tap water required) |
| Condenser Type | Glass “spike” reflux condenser (replaces spherical condenser) |
| Compliance | Fully aligned with GB 11914–1989, ISO 6060:1989, and EPA Method 410.4 principles |
| Brand | Koyuan Instruments |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | KY-100 |
| Pricing | Upon Request |
| Digestion Vessel Capacity | 250 mL Erlenmeyer Flask (24/29 Ground Joint) |
| Sample Throughput | 8 Samples Simultaneously |
| COD Measurement Range | 0–1000 mg/L (direct) |
| Digestion Time | ≤ 2 h |
| Accuracy | RSD ≤ 5.0% for 500 mg/L Potassium Hydrogen Phthalate Standard |
| Ambient Operating Temperature | ≤ 40 °C |
| Heating Power | 1600 W (AC 220 ± 22 V, 50 Hz) |
| Dimensions (L×W×H) | 450 × 350 × 650 mm |
| Cooling Method | Forced-air convection (no tap water required) |
| Reflux Configuration | Glass spiky condenser (replaces traditional spherical condenser) |
| Compliance Standard | GB 11914–1989 “Water Quality — Determination of Chemical Oxygen Demand (Dichromate Method)” |
| Brand | Kyoyuan |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Manufacturer |
| Product Type | Laboratory-grade |
| Model | KY-102(12) |
| Heating Method | Electric heating plate with microcomputer timing control |
| Cooling Method | Air-cooled condenser with static water assist at condensate outlet |
| Digestion Vessels | 12 × 250 mL ground-glass (24/29) conical flasks |
| Digestion Time Range | 10 min – 150 min |
| Temperature Control | Surface temperature display per selected power level |
| Power Rating | ≤2500 W (AC 220 V, 50 Hz) |
| Compliance | HJ 828–2017 |
| Measuring Range | 10–700 mg/L COD (dilution required for samples >700 mg/L) |
| Precision | RSD ≤5.0% for potassium hydrogen phthalate standard (500 mg/L) |
| Ambient Operating Temperature | ≤35 °C |
| Brand | Kyoyuan |
|---|---|
| Model | KY-100COD |
| Heating Temperature Range | 25–170 °C (±1 °C) |
| Timer Setting Range | 0–180 min |
| Sample Capacity | 5 or 10 conical flasks simultaneously |
| Cooling Method | Forced-air cooling |
| Reflux Tube Type | Glass spiky condenser (replaces traditional spherical condenser) |
| Power Control | Microelectronic timing and temperature regulation |
| Origin | Jiangsu, China |
| Manufacturer Status | OEM/ODM manufacturer |
| Compliance | Designed for ASTM D1252, ISO 6060, and HJ 828–2017 methods |
| Brand | Kyoyuan |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | KY-100(8)js |
| Digestion Method | Reflux Digestion |
| Batch Capacity | 8 samples |
| Temperature Setting | 165 °C (per GB 11914–1989 and ISO 6060) |
| Temperature Accuracy | ±1 °C at 165 °C |
| Sample Vessel Compatibility | 250 mL conical flasks or cylindrical digestion vials |
| Timer Range | 0–999 minutes (adjustable in 1-minute increments) |
| Heating Power | 1300 W (AC 220 V ±10 %, 50 Hz) |
| Cooling Method | Forced-air convection (no tap water required) |
| Condenser Type | Glass spiky reflux condenser |
| Measuring Range | 0–1000 mg/L (direct) |
| Precision | RSD ≤5.0% for potassium hydrogen phthalate (500 mg/L) |
| Operating Ambient | 5–40 °C |
| Compliance | Fully aligned with GB 11914–1989, ISO 6060:1989, and EPA Method 410.4 |
| Brand | Keyuan Instruments |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | KY-100(8) |
| Digestion Method | Reflux Digestion |
| Heating Module | Microcrystalline Glass Plate with Inorganic High-Temperature Insulation |
| Batch Capacity | 8 samples |
| Temperature Range | Ambient to 180 °C |
| Temperature Accuracy | ±1 °C |
| Digestion Vessel | 250 mL conical flask (24/29 standard taper) |
| Timer Accuracy | ±15 s/h |
| Power Supply | AC 220 V, 50 Hz |
| Max. Heating Power | ≤1600 W |
| Ramp Time to 180 °C | <20 min |
| Digestion Time Setting Range | 10 min – 150 min |
| Sample Matrix | Aqueous liquid only |
| COD Measurement Range | 0–700 mg/L (direct) |
| Precision | RSD ≤5.0% for 500 mg/L potassium hydrogen phthalate standard |
| Compliance | HJ 828–2017 (replacing GB 11914–1989) |
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