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Original factory packaging
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Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Updated:2025-03-13
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Product Manual Datasheet
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).
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.
In-line thermistor provides automatic temperature compensation
Compatible with most Campbell Scientific dataloggers
| 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 |
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