Table 3.
Commercially available pH sensors.
| Principle | Sensor | Range | Accuracy | Ref. | |
|---|---|---|---|---|---|
| Optical | Pyroscience | pH Sensor Spots | Different ranges available (4–6; 5–7; 6–8; 7–9; total scale) | ±0.05 after 2-point calibration | [191] |
| pH Flow Through Cell | Different ranges available (4–6; 5–7; 6–8; 7–9; total scale) | ±0.05 after 2-point calibration | |||
| pH Sensor Cap for Under water devices | Different ranges available (4–6; 5–7; 6–8; 7–9; total scale) | ±0.05 after 2-point calibration | |||
| PreSens Sensors | pH-1 SMA LG1 | 4.5–7 | resolution: ±0.1 °C accuracy: ±1.0 °C |
[198] | |
| Self-adhesive pH Sensor Spots SP-LG1-SA | 4.5–7 | resolution at pH = 7 ± 0.01 accuracy ±0.05/±0.10 |
|||
| Single-Use pH Flow-Through Cell FTC-SU-HP5-S | 5.5–8.5 | resolution: ±0.02 accuracy: ±0.05 |
|||
| Profiling pH Microsensor PM-HP5 | 5.5–8.5 | resolution: ±0.01 accuracy at pH = 7 ± 0.1 |
|||
| Electrochemical | pH Probes | Total scale | n/a | [197] | |
| Hygienic pH Probe for Sterile Applications | Total scale | n/a | [200] | ||
| Bioreactor pH Probe | Total scale | Accuracy: ±0.1 | [199] | ||