The biggest differences are as follows
1. Volume: The volume of fixed water sampler is larger than that of portable water sampler;
2. Power supply mode: fixed water quality sampler is AC, portable water quality sampler is lithium battery power supply, according to the use of the site can also carry solar power supply;
3. Fixed water quality sampler can only be fixed in a certain place to use, portable water quality sampler can, according to the user's work needs, free to move.