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| Product Name | TongAo TR 6900DZ Desktop STIP-scan | TongAo TR 6900NH Desktop STIP-scan |
| Product Price | $4821.00 | $1475.00 |
| Details | Details | |
| Model comparison | ||
| Type | Multiparameter | Single parameter |
| Style | desktop | desktop |
| Measurement parameters | COD TN TP NH3-N Heavy metals | NH3-N |
| Accessories | ||
| Parameter comparison | ||
| Measurement parameter | COD, ammonia nitrogen, Total phosphorus, Total nitrogen, heavy metals (Total chromium, hexavalent chromium, copper, zinc, nickel, iron) | ammonia nitrogen |
| measurement error | ≤±5% | ≤±5% |
| Repeatability | ≤±5% | ≤±5% |
| Optical inspection Stability | ≤ +/- 0.001A/20min (100,000 hours life) | ≤ +/- 0.001A/20 minutes (100,000 hours life) |
| data storage | 30,000 records (including item, date, time, sample ID, etc.) | 30,000 records (including item, date, time, sample ID, etc.) |
| Linear dispersion quantity | 96 Linear dispersion (expandable) | 96 Linear dispersion (expandable) |
| printer | Built-in thermal printer | Built-in thermal printer |
| display screen | 5-Inch high-definition color LCD screen | 5-Inch high-definition color LCD screen |
| batch Volume | 16/25 water samples/batch | 16/25 water samples/batch |
| Colorimetric method | Digestion Colorimetric tube | Digestion Colorimetric tube |
| sample compatibility | 16Mm (round), 25mm (round) | 16Mm (round), 25mm (round) |
| communication interface | USB cable, LAN, etc | |
| exception notification | Blank comparison prompt, over-Range prompt, etc | Blank comparison prompt, over-Range prompt, etc |
| operation interface | Membrane push-button operation, Chinese/English (optional) | Membrane push-button operation, Chinese/English (optional) |
| Power supply | AC(220V±10%)，50Hz | AC(220V±10%)，50Hz |
| power | 5W | 5W |
| Protection Rating | IP30 | |
| Environment humidity | ≤ 85% non-condensing | ≤ 85% non-condensing |
| Environment temperature | 5~40℃ | 5~40℃ |
| Dimension | 348*250*145mm | |
| instrument weight | Main unit less than 2.6kg | Main unit less than 2.6kg |
| COD detection method | Method 1: HJ/T399-2007 standard; Method 2: Import detection method | |
| COD Measurement Range | 0-20000mg/L；0-20000mg/L | |
| Lower limit of COD detection | 3mg/L；2mg/L | |
| COD digestion environment | 165℃，15min；165℃，20min | |
| COD anti-chlorine interference | 1000Mg/L (expandable); 1000mg/L (expandable) | |
| Ammonia nitrogen detection method | HJ535-2009 "Water quality, determination of ammonia nitrogen, Nessler reagent Spectrophotometric method, spec-trophotometry" | HJ535-2009 "Water quality, determination of ammonia nitrogen, Nessler reagent Spectrophotometric method, spec-trophotometry" |
| Measurement Range of ammonia nitrogen | 0-50mg/L | |
| Ammonia nitrogen detection lower limit | 0.01mg/L | 0.01mg/L |
| Ammonia nitrogen digestion environment | No need to digest | No need to digest |
| Total phosphorus detection method | GB11893-89 | |
| Measurement Range of Total phosphorus | 0~20mg/L | |
| Total phosphorus detection limit | 0.01mg/L | |
| Total phosphorus digestion environment | 125℃，30min | |
| TN detection method | Persulfate oxidation | |
| TN Measurement Range | 0~250mg/L | |
| TN detection lower limit | 0.5mg/L | |
| TN digestion environment | 125℃，30min | |
| Total chromium detection method | GB7466-87 | |
| Measurement Range of Total chromium | 0~5mg/L | |
| Total chromium detection limit | 0.01mg/L | |
| Total chromium digestion environment | 125℃，30min | |
| Hexavalent chromium detection method | GB7467-87 | |
| Measurement Range of hexavalent chromium | 0~5mg/L | |
| Lower limit of hexavalent chromium detection | 0.01mg/L | |
| Hexavalent chromium digestion environment | No need to digest | |
| Copper detection method | Diacetaldehyde oxalyl dihydrazone | |
| Measurement Range of copper | 0~50mg/L | |
| Lower limit of copper detection | 0.01mg/L | |
| Copper digestion environment | No need to digest | |
| Nickel detection method | GB11910-89 | |
| Measurement Range | 0~4mg/L0~50mg/L | |
| Lower limit of nickel detection | 0.01mg/L | |
| Nickel digestion environment | No need to digest | |
| Zinc detection method | xylenol oRange photometry | |
| Measurement Range of zinc | 0~15mg/L | |
| Lower limit of zinc detection | 0.01mg/L | |
| Zinc digestion environment | No need to digest | |
| Iron detection method | HJ/T345-2007 | |
| Measurement Range | 0~4mg/L0~50mg/L | |
| Lower limit of iron detection | 0.01mg/L | |
| Iron digestion environment | No need to digest | |
