CS511-L

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.

Features

  • 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

Specifications

  • O2 Measuring Range: 0.5 to 20 ppm
  • Output: 33 mV ± 9 mV (100% saturation); <2 mV (0% saturation)
  • Accuracy: ±2%
  • Response Time: 5 minutes from 100% to 0% oxygen
  • Minimum Water Velocity: 2 in s-1 (5 cm s-1) across membrane
  • Minimum Submersion Depth: 2.5 in (6.35 cm)
  • Pressure: 0 to 100 psig
  • Temperature Compensation: Automatic from 40° to 104°F (4° to 40°C)
  • Probe Electrolyte: NaCl + glycerol (prevents freezing)