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Water Quality Probe




       This versatile probe facilitates the measurement of a wide range of water quality parameters. These include:

Optical Dissolved Oxygen (DO): One of the primary indicators of aqua quality, this measures the concentration of dissolved oxygen in water.

 Absolute Electrical Conductivity (EC): Provides an indication of the presence of inorganic dissolved solids and therefore the purity of water. Pure water is an extremely poor conductor of electrical currents and therefore a change in EC can suggest degradation of water quality.

Specific Electrical Conductivity (EC): The EC adjusted to reflect the temperature of the water being tested. Water Acidity (pH): Aquatic organisms are often sensitive to the acidity of water. Therefore, monitoring and maintaining the pH balance is important in many situations.

Oxidation Reduction Potential (ORP): Oxidation is the loss of electrons by a chemical species following the introduction of a new species. The corresponding reaction is the reduction process in which chemical species gain electrons. ORP is therefore an indication of the potential for oxidation or reduction reactions to take place.

Total Dissolved Solids (TDS): Indicates the concentration of minerals, salts, metals and ions dissolved in water

Resistivity: The ability of water to resist an electrical current. This is the opposite of EC. Therefore, a body of water with a high EC will have a correspondingly low resistivity.

Salinity: Provides a value for the concentration of dissolved salts in the water.

Seawater Specific Gravity (SSG): A measure of the density of water. Saltwater is more dense than pure or freshwater.

Temperature: Affects a number of chemical processes that take place in water.

Depth: Indicates the depth using EC.

     Key Technical Data                                         

Probe Communication: SDI-12 Protocol

Dissolved Oxygen (DO):

Range: 0-500.0%/0-50.00mg/L

Resolution: 0.1%/0.01mg/L

Accuracy: 0-200%: ±1% of reading,

200-500%: ±10% of reading

Conductivity (EC):

Range0-200 mS/cm (0-200,000 μScm)

Resolution: 0-9999 μS/cm,10.00-99.99mS/cm,100.0-200.0m

Accuracy: ±1% of reading ±1μS/cm if greater

Total Dissolved Solids (TDS):

Range: 0-100,000 mg/L

Resolution: 2 Ranges: 0-9999 mg/L or 10.00-100.00 g/L

Accuracy: ±1% of reading or ±1mg/L if greater


Range: 5 ?cm-1 M?cm

Resolution: 2 Ranges: 5-9999?cm or 10.0-1000.0K?m

Accuracy: ±1% of reading or ±1?cm if greater


Range: 0-70PSU or 0-70.00ppt

Resolution: 0.01PSU or 0.01ppt

Accuracy: ±1% of reading or ±0.1 unit if greater

Seawater Specific Gravity (SSG): 

Range: 0-50 st Resolution 0.1 st

Accuracy: ±1.0 st

Water Acidity (pH): 

Range: 0-14pH/±625mV

Resolution: 0.01pH/±0.1mV

Accuracy: ±0.01pH/±5mV

Oxidation Reduction Potential (ORP): 

Range: ±2000 mV

Resolution: 0.1 mV

Accuracy: ±5 mV


Range: -5°C to +50°C

Resolution: 0.01°C

Accuracy: +0.5°C


Range: 0-100 m (0-330F)

Resolution: 0.01 m/F

Accuracy: ±1%