Measuring pH levels. Hand holding a pH sensor in a beaker of acid while connected to a datalogger through a wire (upper right). pH levels,which indicate the concentration of hydrogen ions,show relative acidity or alkalinity. Here,the sensor will measure a low pH (between 0 and 7),which indicates that an acid is present. The pH reading is recorded by the datalogger,and the variation in pH over time can be plotted | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Chillmaid, Martyn F. |
Bildgröße: | 2433 px × 3651 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |