These instruments are of four types based on the material used to make hot plate surfaces It is the most expensive type of hot plate that provides uniform heating of high-volume or viscous samples. Stirring hot plates: Heating and stirring elements are installed at the flat top surface in this hotplate type.The heating system helps to heat the solution, whereas the electromagnet helps to move the electromagnet immersed in a solution to move in a circular motion. Magnetic stirrer with hot plates: This type of hot plate consists of a heating system and an electromagnet placed under its surface.Further, such types of hot plates require less maintenance and re-calibration routines. Standard hot plates: These types of hot plates are only used to heat the sample.Hot plates are of three types based on the designs This type of hot plate helps to achieve exact temperature and speed. Digital type hot plates: This type consists of a temperature and speed control knob and a readout screen.However, they consist of an indicator light that helps to know the heating element and operating stirring mechanism. These types of hot plates lack a readout screen to report the exact temperature and speed. They consist of a knob to adjust temperature and rotation speed. Analog-type hot plates: These are the most simple and cost-effective type.Hot plates are of two types based on display Hot plates are of various types, but we have to choose based on the material we heat, which are as follows Based on Display: In comparison, the rotation control knob is used to adjust the rotation of the stir bar. When the hot plate switch is turned on, a heating knob helps to adjust the temperature. Two knobs of heat control and rotation control, respectively, fits in a hot plate to control heat and rotation. In this hot plate type, a magnetic bar known as a ‘stir bar’ is placed in a solution containing a beaker that helps to mix the solution by spinning. Whereas, in the case of a hot plate stirrer, along with a heating element, there is an electromagnet that fits in the internal structure of the hot plate. The sample is then placed at the top of the plate, transferring heat from the plate to the sample. When the instrument reaches the desired temperature, the heating element activates, and the plate begins to heat up. In a hot plate, the temperature control connects to a heating element that encloses inside a plate. When you place the sample on a hot plate, heat transfers from the container to the sample through direct contact. The main principle of a hot plate is based on heating through conduction. Similarly, an external temperature controller helps to adjust the temperature and a thermometer helps to hold the thermometer. Vertical support rod and holding rod help to provide support to the glassware used in conducting experiments. These include the vertical support rod, holding rod, external temperature controller, and thermometer holder. Hot plates are available with various accessories to conduct multiple experiments. The type of it that we use depends on the nature of the material to be heated. It provides the surface to heat the solution uniformly. The central part of the hot plate holds the vessel containing the solutions.
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