These waterbaths have ever been used. They have a temperature range of -20°C to +135°C (-4°F to +275°F). With a stability of +/- 0.07 degrees. Reservoir capacity is 7 litres. Flow rate / pressure is 12 l.p.m., max pressure of 2.3 psi. It can accommodate a 600 ml beaker inside. The built-in pump allows fluid circulation to external water-jacketed viscometers or rheometers. Does not require tap water for standard cooling within its operating range.