Professional classification of constant temperature water baths and oil baths used in manufacturing R&D and quality control departments. Tank-type temperature control equipment that precisely maintains constant temperature for material testing, chemical reactions, enzyme reactions, solubility testing, viscosity measurement and other experiments. Features digital temperature control, circulation pumps, and safety devices in desktop to large capacity models. Unlike dryers or incubators, achieves uniform temperature distribution through indirect heating using liquid media (water/oil). Laboratory-specific equipment distinguished from large-scale heating tanks in manufacturing sites and general water baths.