Ammonia Range :
Low Range : 0.00 to 3.00 mg/L (as NH3-N)
High Range : 0.00 to 3.00 mg/L (ppm) (as NH3-N)
Ammonia Resolution :
Low Range : 0.01 mg/L
High Range : 1 mg/L
Ammonia Accuracy :
Low Range : ±0.10 mg/L ±5% of reading
High Range : ±1 mg/L ±5% of reading
Ammonia Method : Adaptation of the ASTM Manual of Water and Environmental Technology, D1426-92, Nessler method.

Chemical Oxygen Demand Range :
Low Range : 0 to 150 mg/L
Medium Range : 0 to 1500 mg/L
High Range : 0 to 15000 mg/L
Chemical Oxygen Demand Resolution : Low Range and Medium Range: 1 mg/L
High Range: 10 mg/L
Chemical Oxygen Demand Accuracy :
Low Range : ±5 mg/L ±5% of reading
Medium Range : ±15 mg/L ±4% of reading
High Range : ±150 mg/L ±3% of reading
Chemical Oxygen Demand Method : Adaptation of the USEPA 410.4 approved method for the COD determination on surface waters and wastewaters
Free Chlorine Range : 0.00 to 5.00 mg/L
Free Chlorine Resolution : 0.01 mg/L
Free Chlorine Accuracy : ±0.03 mg/L or ±4 % of reading
Total Chlorine Range : 0.00 to 5.00 mg/L
Total Chlorine Resolution : 0.01 mg/L
Total Chlorine Accuracy : ±0.03 mg/L or ±4 % of reading
Chlorine Method : Adaptation of the EPA method 330.5 and Standard Methods for the Examination of Water and Wastewater, 20th edition, 4500-Cl G, DPD method
Nitrate Range : 0.0 to 30.0 mg/L NO3--N
Nitrate Resolution : 0.1 mg/L
Nitrate Accuracy : ±1.0 mg/L or ±5 % of reading
Nitrate Method : Chromotropic acid method
Nitrogen, Total Range :
Low Range : 0.0 to 25.0 mg/L
High Range : 10 to 150 mg/L
Nitrogen, Total Resolution :
Low Range : 0.1 mg/L
High Range : 1 mg/L
Nitrogen, Total Accuracy :
Low Range : ±1.0 mg/L or ±5 % of reading
High Range : ±3 mg/L or ±4 % of reading
Nitrogen, Total Method : Chromotropic acid method
Logging Memory : 200 samples
Connectivity : USB
Display : Liquid Crystal Display (LCD)
Power Supply : 12 VDC adapter (included)
Environment : 0 to 50°C (32 to 122°F); max 90% RH non-condensing
Photometer/Colorimeter Light Source : tungsten lamps with different narrow band interference filters
Photometer/Colorimeter Light Detector : silicon photocell
Dimensions : 235 x 212 x 143 mm (9.2 x 8.34 x 5.62")
Weight : 1.5 Kg (3.3 lb)