A benchtop pH meter is a larger, fixed (or semi-fixed) instrument meant for laboratory or quality control use. Unlike handheld or pen-style meters, these are designed to stay on a bench, offering greater precision, more features, more stable readings, and more flexibility for a variety of sample types. They are used where more frequent, accurate, or detailed pH measurements are required — e.g. research labs, chemical/food/pharma QC labs, environmental / water testing labs, etc.