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    Product Name TongAo TR 6900D Desktop STIP-scan TongAo TR 6900DZ Desktop STIP-scan
    Product Price $4630.00 $4821.00
    Details Details
    Model comparison
    Type Multiparameter Multiparameter
    Style desktop desktop
    Measurement parameters COD TN TP NH3-N NTU Miscellaneous COD TN TP NH3-N Heavy metals
    Accessories
    Parameter comparison
    Measurement parameter COD, ammonia nitrogen, Total phosphorus, Total nitrogen, turbidity, suspended solids COD, ammonia nitrogen, Total phosphorus, Total nitrogen, heavy metals (Total chromium, hexavalent chromium, copper, zinc, nickel, iron)
    measurement error ≤±5% ≤±5%
    Repeatability ≤±5% ≤±5%
    Optical inspection Stability ≤ +/- 0.001A/20min (100,000 hours life) ≤ +/- 0.001A/20min (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 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 IP30
    Environment humidity ≤ 85% non-condensing ≤ 85% non-condensing
    Environment temperature 5~40℃ 5~40℃
    Dimension 348*250*145mm 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 Method 1: HJ/T399-2007 standard; Method 2: Import detection method
    COD Measurement Range 0-20000mg/L；0-20000mg/L 0-20000mg/L；0-20000mg/L
    Lower limit of COD detection 3mg/L；2mg/L 3mg/L；2mg/L
    COD digestion environment 165℃，15min；165℃，20min 165℃，15min；165℃，20min
    COD anti-chlorine interference 1000Mg/L (expandable); 1000mg/L (expandable) 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 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 GB11893-89
    Measurement Range of Total phosphorus 0~20mg/L 0~20mg/L
    Total phosphorus detection limit 0.01mg/L 0.01mg/L
    Total phosphorus digestion environment 125℃，30min 125℃，30min
    Turbidity detection method Spectrophotometric method,spec-trophotometry
    Turbidity Measurement Range 0~1000NTU
    Lower limit of turbidity detection 0.5NTU
    Turbidity digestion environment No need to digest
    Suspension detection method Direct Colorimetry
    Measurement Range of suspended solids 0~500mg/L
    Lower limit of suspended solids detection 2mg/L
    Suspension digestion environment No need to digest
    TN detection method Persulfate oxidation Persulfate oxidation
    TN Measurement Range 0~250mg/L 0~250mg/L
    TN detection lower limit 0.5mg/L 0.5mg/L
    TN digestion environment 125℃，30min 125℃，30min