| Model |
pHotoFlex® STD |
pHotoFlex® pH |
pHotoFlex® Turb |
| Measuring parameters |
Photometry |
Photometry, pH |
Photometry, pH, Turbidity |
| Light source |
LED |
LED |
LED |
| Wavelengths (nm) |
436, 517, 557, 594, 610, 690 |
436, 517, 557, 594, 610, 690 |
436, 517, 557, 594, 610, 690 + 860 |
| User-defined methods |
10 |
100 |
100 |
| Methods/software update |
Via Internet |
Via Internet |
Via Internet |
| Data storage |
100 data sets |
1000 data sets |
1000 data sets |
| pH |
— |
0-16 |
0-16 |
| Turbidity |
— |
— |
0-1100 NTU/FNU |
| Accuracy: Photometry |
<2 nm wavelength accuracy,
0.005 abs. reproducibility |
<2 nm wavelength accuracy,
0.005 abs. reproducibility |
<2 nm wavelength accuracy,
0.005 abs. reproducibility |
| Accuracy: Photometry |
— |
±0.01 pH |
±0.01 pH |
| Accuracy: Turbidity |
— |
— |
0.01 NTU/FNU or ±2% of the measured value |
| Calibration: pH / Turbidity |
— |
3 point |
3 point |
| Interface |
RS 232, USB via adapter (optional) |
RS 232, USB via adapter (optional) |
RS 232, USB via adapter (optional) |
| Battery |
Type AA batteries 4×1.5 V, for approx. 3000 measurements |
Type AA batteries 4×1.5 V, for approx. 3000 measurements |
Type AA batteries 4×1.5 V, for approx. 3000 measurements |
| Rechargeable battery |
Optional: LabStation |
Optional: rechargeable battery or LabStation |
Optional: rechargeable battery or LabStation |