Oxygen diffuses through the CS511’s 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.
Because the CS511 is shipped dry, DO electrolyte needs to be added before using the sensor. DO electrolyte, as well as spare membranes, are included in the sensor’s shipping kit.
Currently, the CS511 is Sensorex’s Model DO6400/T. Prior to June 2008, the CS511 was Sensorex’s Model DO6200/T. Programming, wiring, and most specifications are the same for these two sensors. However, they use different accessories and look different. Replacement parts remain available for the older DO6200/T.
Benefits and Features
- In-line thermistor provides automatic temperature compensation
- Compatible with most Campbell Scientific dataloggers
- Agitator available that keeps the sensor clean and moves water across the membrane for more accurate readings
The CS511, manufactured by Sensorex, is a submersible, rugged, low-maintenance sensor that senses dissolved oxygen in a medium (typically water). 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).
- CS511-L Dissolved Oxygen Probe 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.
| Operating Temperature Range | 0° to 50°C |
| Measurement Range | 0.5 to 50 ppm (for O2) |
| Accuracy | ±2% |
| Output | 33 mV ± 9 mV (100% saturation); < 2 mV (0% saturation) |
| Response Time | 5 min from 100% to 0% oxygen |
| Minimum Water Velocity | 5 cm s-1 (2 in. s-1) across membrane |
| Minimum Submersion Depth | 6.35 cm (2.5 in.) |
| Pressure | 0 to 100 psig |
| Temperature Compensation | Automatic from 4° to 40°C |
| Probe Electrolyte | NaCl + glycerol (prevents freezing) |
| Diameter | 5.72 cm (2.25 in.) |
| Height | 17.78 cm (7 in.) from bottom of sensor to end of cable strain relief |
| Shipping Weight | 0.8 kg (1.75 lb) including sensor and shipping kit |
