Conductivity Salinity Freshwater Approximation Converter
Use explicit local freshwater conductivity/salinity calibration after caller linear temperature normalization; not universal seawater practical salinity, ionic composition inference or chemistry certification.
Description
Freshwater conductivity-to-salinity conversion needs local calibration and a stated temperature normalization.
Freshwater conductivity-to-salinity conversion needs local calibration and a stated temperature normalization. Ionic composition affects the relation.1
Enter nonnegative EC/temperature coefficient, finite temperatures and positive slope/calibration maximum. Require positive factor and normalized EC≤maximum; return reference EC and g/kg.
When to use Conductivity Salinity Freshwater Approximation Converter
Use Conductivity Salinity Freshwater Approximation Converter when you need to evaluate the supplied records under the calculation and evidence rules below. No universal seawater practical-salinity, ion-composition or chemistry certification is supplied.
Prepare the observed lake or sample measurements and explicit calibration, reference values or thresholds requested. Keep depth coverage, units, dates and sampling conditions consistent.
How to use Conductivity Salinity Freshwater Approximation Converter and understand its results
- Prepare the observed lake or sample measurements and explicit calibration, reference values or thresholds requested. Keep depth coverage, units, dates and sampling conditions consistent.
- Enter observedConductivityMicroS, observedTemperatureC, referenceTemperatureC, callerTempCoefficientPerC, callerSalinityGkgPerReferenceMicroS, callerCalibrationMaximumReferenceMicroS using the field table and calculation rules, then run the tool.
- Read referenceNormalizedConductivityMicroS, calibratedFreshwaterSalinityGkg. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| observedConductivityMicroS | Observed conductivity micro s | number | Required |
| observedTemperatureC | Observed temperature c | number | Required |
| referenceTemperatureC | Reference temperature c | number | Required |
| callerTempCoefficientPerC | Caller temp coefficient per c | number | Required |
| callerSalinityGkgPerReferenceMicroS | Caller salinity gkg per reference micro s | number | Required |
| callerCalibrationMaximumReferenceMicroS | Caller calibration maximum reference micro s | number | Required |
Enter nonnegative EC/temperature coefficient, finite temperatures and positive slope/calibration maximum. Require positive factor and normalized EC≤maximum; return reference EC and g/kg.
factor=1+α(observedT−referenceT); referenceEC=observedEC/factor; salinity=referenceEC×slope Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| referenceNormalizedConductivityMicroS | Reference normalized conductivity micro s | number |
| calibratedFreshwaterSalinityGkg | Calibrated freshwater salinity gkg | number |
{
"input": {
"observedConductivityMicroS": 100,
"observedTemperatureC": 20,
"referenceTemperatureC": 25,
"callerTempCoefficientPerC": 0.02,
"callerSalinityGkgPerReferenceMicroS": 0.001,
"callerCalibrationMaximumReferenceMicroS": 1000
},
"output": {
"referenceNormalizedConductivityMicroS": 111.11111111111111,
"calibratedFreshwaterSalinityGkg": 0.11111111111111112
}
}Limitations and assumptions
No universal seawater practical-salinity, ion-composition or chemistry certification is supplied.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use TDS From Conductivity Calculator: Conductivity and total dissolved solids require a local calibration on a consistent temperature basis. A universal conversion factor cannot describe every ionic mixture. For a complementary task, use Hardness Carbonate Noncarbonate Split Calculator: Hardness and alkalinity can be compared when both use CaCO₃-equivalent units. Alkalinity is not a direct calcium concentration.
References
Similar or alternative tools
- TDS From Conductivity Calculator
Conductivity and total dissolved solids require a local calibration on a consistent temperature basis. A universal conversion factor cannot describe every ionic mixture.
- Hardness Carbonate Noncarbonate Split Calculator
Hardness and alkalinity can be compared when both use CaCO₃-equivalent units. Alkalinity is not a direct calcium concentration.