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Hach Company

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BrandHach
OriginImported
Manufacturer TypeManufacturer
ApplicationLaboratory Use
Measured ParameterTotal Phosphorus
Measurement PrincipleAcidic Persulfate Digestion + Ammonium Molybdate Colorimetry at 880 nm
Measurement Range0.01–3.8 mg/L as PO₄–P
Accuracy<2% at 1 mg/L
Detection Limit0.01 mg/L
Resolution0.001 mg/L
Sample pH Range2–10
Digestion Conditions150 °C, 6 bar
Particle ToleranceUp to 100 µm
Calibration MethodSingle- or Multi-point
Auto-sampler Options36-position (with stirring) or 53-position (without stirring)
DisplayColor LCD
Weight40 kg (digestion/analysis unit), 5 kg (auto-sampler)
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BrandHACH
OriginImported
Manufacturer TypeManufacturer
ModelPhosphax Sigma
Measurement ParameterTotal Phosphorus
Instrument TypeOnline Analyzer
Measurement PrincipleSpectrophotometric Method (Molybdenum Blue)
Measurement RangeTotal Phosphorus: 0.01–5.0 mg/L as P
Accuracy±2% of reading
Detection Limit0.01 mg/L as P
Resolution0.01 mg/L as P
Orthophosphate Range0.01–5.0 mg/L as P
Cycle Time~10 minutes per analysis
CalibrationAutomatic
Sample Flow Rate100 mL/h
Reagent Replacement IntervalEvery 3 months
Output SignalsTwo isolated 4–20 mA analog outputs (max. load 500 Ω)
Communication ProtocolsModbus RTU, Profibus DP
Operating Temperature5–40 °C
Power Supply220 VAC, 50 Hz
ComplianceDIN 38405-Part D11 (German Standard for Phosphorus Determination)
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BrandHach
OriginImported
Manufacturer TypeManufacturer
ModelNPW160H Total Phosphorus and Total Nitrogen Analyzer
Measurement ParametersTotal Nitrogen (TN), Total Phosphorus (TP)
Instrument TypeOnline Analyzer
Measurement PrincipleHigh-Temperature Alkaline Persulfate Digestion Followed by Spectrophotometric Detection (UV at 220 nm for TN
Measurement RangeTP: 0–0.5 mg/L to 0–20 mg/L
TN0–2 mg/L to 0–100 mg/L
Accuracy≤3% of reading
Detection Limit≤3% of full scale
ResolutionAs per configured range
Repeatability≤3%
Cycle TimeConfigurable from 1 hour to 24 hours per measurement
Sample Flow Rate1–3 L/min (sample volume ~35 mL per analysis)
Sample Inlet Temperature2–40 °C
Operating Ambient Temperature5–40 °C
Relative Humidity≤85% RH, non-condensing
Data StorageInternal memory retains 1 year of data and logs
Dimensions (H×W×D)450 × 380 × 1280 mm (excluding drip tray)
Weight~76 kg (excluding reagents)
Communication InterfaceRS-485 (Modbus RTU protocol)
Digestion Conditions120 °C, 30 min alkaline persulfate oxidation
ComplianceASTM D5176 (TP), ASTM D4519 (TN), ISO 15681-1, HJ 636–2012 (China), GB 11893–1989 (China)
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BrandHach
OriginImported
Manufacturer TypeManufacturer
ModelNPW-160
Measurement ParametersTotal Phosphorus (TP), Total Nitrogen (TN), UV-based Chemical Oxygen Demand (UV-COD)
Instrument TypeOnline Analyzer
Measurement PrincipleAlkaline Persulfate Oxidation + Spectrophotometry (TP: Molybdenum Blue at 700 nm
TNUV Absorbance at 220/275 nm with Turbidity Correction
UV-CODDual-wavelength UV-Vis at 254/546 nm)
Measurement RangesTN: 0–2 mg/L to 0–100 mg/L
TP0–0.5 mg/L to 0–20 mg/L
UV-COD0–20 mg/L to 0–500 mg/L
Accuracy≤ ±5% of reading
Detection LimitsTN: 0.2 mg N/L
TP0.06 mg P/L
Resolution0.001 mg/L
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BrandHACH
OriginImported
Manufacturer TypeManufacturer
ModelNT6800
Measurement ParameterTotal Nitrogen (TN)
Instrument TypeOnline Analyzer
Measurement PrincipleAlkaline Potassium Persulfate Digestion + UV-Visible Spectrophotometry
Measurement Range0–5 / 10 / 20 / 50 / 100 / 200 mg/L (field-configurable upper limit compliant with HJ 355–2019
Detection Limit0.05 mg/L
Display Resolution0.1 / 0.01 / 0.001 / 0.0001 mg/L (selectable 3-, 4-, or 5-digit display)
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BrandHACH
OriginImported
Manufacturer TypeManufacturer
ModelIL500
ApplicationTotal Nitrogen (TN)
Instrument TypeLaboratory Analyzer
Measurement PrincipleSpectrophotometry (UV absorbance at 210 nm and 228 nm)
Digestion MethodAlkaline Potassium Persulfate Oxidation (150 °C, 8 bar)
Measurement RangeLow Range: 0.5–30 mg/L TN
High Range30–150 mg/L TN
Accuracy<2% at 15 mg/L TN
Detection Limit0.5 mg/L TN
Resolution0.1 mg/L
Sample pH Range2–11
Particle ToleranceUp to 100 µm
CalibrationSingle- or Multi-point
Auto-sampler Options36-position (with stirring) or 53-position (without stirring)
DisplayColor LCD
WeightDigestion/Analysis Unit: 40 kg
Auto-sampler5 kg
CommunicationRS232 & Wireless Infrared
ComplianceDesigned for ASTM D1426, ISO 11905-1, EPA 351.2, and USP <643> alignment
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