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A rotary evaporator, also known as rotovap or rotavap, refers to a type of equipment for solvent evaporation under reduced pressure. It is generally composed of a vacuum system, a condenser, a motor and a heated water or oil bath. The vacuum system can be used to reduce the pressure within the rotary evaporation system so that the solvent will have a lower boiling point at a reduced pressure. The condenser is used to condense the evaporated sample. The motor can rotates the evaporation flask. So what is the purpose of the water bath in a rotary evaporator?

What is a Water Bath?

A water bath is a kind of common laboratory equipment, which can provide heat source for a great variety of devices that require heating. The temperature range of water bath is from room temperature to 99℃. The temperature control accuracy can be controlled within 1℃. It can be used alone or work with a rotary evaporator and a reactor.

What is a Water Bath Used for in a Rotary Evaporator?

Briefly speaking, a water bath in a rotary evaporator can be used to heat sample in the evaporation flask and regulate the temperature.

Water Bath
Water Bath

What is the Principle of Water Bath?

The water temperature can be transfered to the resistance value by a sensor, which is further amplified and compared by integrated amplifier. Then the control signal can be output. It can effectively control the average heating power of electric heating tube and maintain water in constant temperature.

What are Advantages of Water Bath?

A water bath adopts the stainless steel shell. The heating unit can heat quickly and evenly, providing an accurate temperature control, as well as cool quickly. It also features compact structure, energy conservation, controllable output flow, and safe and convenient operation. The liner is made of imported stainless steel plate and the shell is made of electrostatic spray sheet with high quality. The heating tube is in the middle of the bath, featuring fast heating, high thermal efficiency, less power consumption and electronic thermostat.


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