CS511 Dissolved Oxygen Probe

The CS511 is a rugged, low-maintenance sensor that is manufactured by Sensorex.
It consists of a self-polarizing galvanic cell that generates a millivolt signal proportional to the amount of oxygen present in the measured medium (typically water). Oxygen diffuses through its membrane onto a cathode that produces a chemical reaction. An electrical current is produced by this reaction, which is converted from microamps to millivolts by an in-line resistor. An in-line thermistor provides automatic temperature compensation.


  • Uses a galvanic cell
  • Requires 2.5" submersion depth and 2 inches per second minimum water flow across membrane
  • Measures temperature with a thermistor
  • Agitator available
  • Manufactured by Sensorex


  • Range: 0 to 20 mg/l dissolved oxygen
  • Accuracy: ±2%
  • Operating Temperature Range: 32° to 122°F (0° to 50°C)
  • Pressure: 0 - 100 psig
  • Temperature Compensation: Automatic from 40° to 104°F (4° to 40°C)
  • Diameter: 2.2 in (5.59 cm)
  • Probe height: 3.5 in (8.89 cm)
  • Weight: 1.1 lbs. (0.50 kg)

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CS511 Brochure

File Size 81KB   Filename b_cs511.pdf   Download