Range

Dissolved Oxygen

0 ÷ 20,0 ppm or mg/l - 0 ÷ 200% SAT

Resolution 0,1 ppm o mg/l - 1% SAT

Avaiable versions with double parameter

4238-83 [pH/ORP - Dissolved Oxygen]

4262-83 [Turbidity - Dissolved Oxygen]

4263-83 [Suspended Solids - Dissolved Oxygen]

S423/Oxysens

Measurement principle

The oxygen content in liquids is best measured with cells using Clark's principle. These cells generate an electrical current proportional to the oxygen partial pressure which can be evaluated with a suitable measurement converter. In order to prevent interference effects, the Clark's cell is covered with a gas-permeable membrane.

The PTFE membranes typically used, however, are mechanically very fragile, with the result that they must be frequently changed to allow reliable measurement. It is difficult to handle such fragile membranes. As a solution, S423 use the OPTIFLOW membrane. This membrane is very  mechanically stable and is manufactured as laminate around a steel mesh. OPTIFLOW membranes are stable under harsh ambient conditions as well as high pressures. This ingenious design allows fast response times to be combined with unusually low flow dependence.

In addition to the PG 13.5 versions with their various lengths, they are now also available as 25 mm versions.

The S423/OXYSENS sensors have been developed as 100% maintenance-free, low cost sensors for water management and fish farming.

Maintenance free

No membrane or electrolyte substitution is requested. Replace the sensor if it can no longer be calibrated.