CALCULATORS
Water quality calculators
Enter the data of your analysis and get the result instantly. All calculators use the same formulas as our monitoring panel, which calculates them on its own from the IoT probes.
- Langelier saturation index: is your water corrosive or scale-forming?
- Calculate the Ryznar index of your water: The Ryznar stability index (RSI) shows whether water tends to form calcium carbonate scale or to corrode pipes and equipment. It complements the Lange
- Calculate the Puckorius index of your water: The Puckorius scaling index (PSI) estimates the tendency to scale or corrode taking into account the buffering capacity of the water (its alkalinity).
- Calculate the Larson-Skold index: The Larson-Skold index relates chloride and sulphate to the alkalinity of the water and estimates its corrosivity towards steel and cast iron. It is u
- Calculate the SAR of your irrigation water: The sodium adsorption ratio (SAR) measures the risk that sodium in irrigation water damages soil structure and permeability. It is calculated from the
- Calculate the dissolved oxygen saturation: Percentage saturation compares the measured dissolved oxygen with the maximum the water can hold at that temperature. It is the usual way to assess ox
- Calculate the free ammonia of your water: Only part of the total ammonium is present as free ammonia (NH₃), the form that is toxic to fish. That fraction grows sharply as pH and temperature ri
- Calculate the disinfection CT: The CT value (disinfectant concentration times contact time) shows whether chlorine disinfection is enough to inactivate microorganisms. It is compare
- Calculate flow in channels, weirs and pipes: The flow in an open channel or a part-full pipe is calculated from the water level: in a calibrated structure (Parshall flume, Venturi or Khafagi flum
- Calculate sludge age and F/M ratio: Sludge age and the food-to-microorganism ratio (F/M) are the two parameters used to control an activated sludge reactor: how long the biomass stays in
- Calculate the population equivalent of a discharge: The population equivalent expresses the pollutant load of wastewater as the number of people who would generate the same load (60 g of BOD₅ per day pe
