Description
This Luer Lock adapter is equipped with a miniaturized pH Sensor Spot type HP5 (measurement range pH 5.5 – 8.5). A polymer optical fiber is attached to the Sensor Stick and connects it to a pH meter. This way continuous, non-invasive pH measurements can be performed. The pH Sensor Stick can easily be integrated in customer specific flow-through cells or experimental set-ups via Luer connectors. The SST-HP5-US is independent of flow velocity or electromagnetic fields and due to its small size it can be implemented in many set-ups where other pH measurement equipment simply does not fit.
| Measurement range | pH 5.5 – 8.5 |
| Resolution | at pH = 7: ± 0.02 pH |
| Accuracy** | at pH = 7: ± 0.05 pH |
| Drift | at pH = 7: < 0.005 pH per day (sampling interval of 1 min.) |
| Measurement temperature range | From + 5 °C to + 50 °C |
| Response time (t90)*** | < 120 sec. |
| Properties | |
| Compatibility | Aqueous solutions, ethanol (max. 10 % v/v), methanol (max. 10 % v/v), pH 2 – 10 |
| Cross sensitivity | Reduced to ionic strength (salinity); a high concentration of small fluorescent molecules in the visible range can interfere |
| Sterilization procedures**** | Irradiation, Ethylene oxide (EtO) |
| Calibration | SSTs are pre-calibrated; single-point adjustment is recommended |
| Storage stability | 18 months provided the sensor is stored in the dark |
*provided the pH Sensor Stick is used without further handling in physiological solution
**after single-point calibration at pH = 7
***equilibrated Sensor Stick with physiological solution and sufficient flow rate (min. 15 mL/min) at 37 °C)
****recalibration may be required
