Viscosity Bath Manufacturers in Gujarat Brand: Hema Another notable feature in modern viscosity baths is the ability to maintain a constant temperature over extended periods, even when the bath is in continuous use. For example, in the automotive industry, engine oils are often tested for their behavior under long-term use at high temperatures. Viscosity baths can simulate these conditions by maintaining a stable environment for hours or even days, providing accurate data on how oils or lubricants will perform during engine operation. This feature is essential for testing materials that will undergo prolonged thermal exposure in real-world applications.