Online Instrumentation - WTW.com

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• Continuous measurements
• Automatic calibration
• Short response time
Measuring Principle
Technical Data OA 110
Standard 1 Standard 2*
Measuring Ranges NH 4 -N: 0.1 … 1000 mg/l; 0.01 … 71.00 mmol/l NH 4 -N: 0.05 … 10 mg/l; 0.005 … 0.71 mmol/l*
NH 4 +: 0.1 … 1280 mg/l; 0.01 … 71.00 mmol/l NH 4 +: 0.05 … 12.8 mg/l; 0.005 … 0.71 mmol/l*
Resolution
(Display)
Range: 0.10 … 10 mg/l: 0.01 mg/l
10.0 … 100 mg/l: 0.1 mg/l
100 … 1000/1280 mg/l: 1 mg/l
Accuracy ± 5 % of the measured value ± 0.2 mg/l at