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- Digital, weighted probe
- No membranes
- No electrolytes
- No oxygen consumption
- No flow dependence or minimum flow rate
- Fast and stable readings
- Not affected by sunlight
- Factory calibrated “Smart Cap”
- Smart Caps last one year
- Minimal maintenance
How the probe works
The Hanna HI-764113 optical DO sensing probe is based on the principle of fluorescence quenching. The sensing method features an immobilised pT based luminophore that is excited by the light of a blue LED and emits a red light. Dissolved oxygen quenches this excitation.
The major components of the probe include a blue LED for excitation, a red LED that is used as a reference light, and a photodetector. The Smart Cap™ is locked in place on the optical probe and includes the immobilised 02 sensitive luminophore with rugged insoluble black oxygen permeable protective layer.
The sensor provides accurate DO measurements over long periods of time without the need for frequent calibration.
Specifications
| HI764113 Probe Specification | ||
| Probe Body Material | ABS | |
| Smart Cap™ material | Polypropylene | |
| Cable jacket material | PVC | |
| Cable Length | 4m, 10m and 20m options | |
| probe guard | 316 Stainless steel | |
| Temperature Measurement | Thermistor | |
| Pressure | 20m (29 PSI) | |
| Probe Dimensions with guard | 174 x 25mm | |
| Response Time | 45 seconds | |
| Probe weight with guard | 400g with 4m cable length | |
| probe ingress protection rating | IP68 | |
| Sensor type | Optical; luminescence quenching |
