The dynamic dry baths are used to heat samples. The term dry bath intends to differentiate from other techniques of heating by means of a liquid medium. The laboratory dry bath is generally utilized to thaw, boil, incubate and warm specimen for utilizing in molecular biology, microbiology, assay preparation, tissue/cell culture, biochemistry, genetic studies, and proteomics.
Also known as dry block heaters, these devices utilize a small amount of space and are extremely reliable. There are two major categories of dry baths including digital dry baths and analog dry baths. The digital dry baths are set apart from analog dry baths as they incorporate a microchip into the model. This enables the user to control the temperature of the bath by means of the digital interface whereas analog dry baths are not equipped with microchip technology. While the use of microprocessors and a digital display in the contemporary dry baths makes it easier to select and validate temperatures, however, it may not provide precision. For obtaining exact precision, it is advisable to use a temperate probe or external thermometer given that the digital display only shows the temperature within the block and not the sample being heated.
The dry bath can easily be accommodated directly on the benchtop where testing is performed. The capacity of these baths is estimated in blocks. According to the size of the block, a specific number of tubes can be placed inside each block. The heating blocks can also suit different tube sizes. The most widely recognized sizes for blocks are 1, 2 and 4 block models. Blocks of different measurements may be selected to suit diverse testing modalities. These blocks are fast and easy to change in the majority of units. Custom blocks are likewise accessible with numerous units, to meet particular requirements for vessel shape or size. Blocks are produced using high-grade supplies, often aluminum, and specifically machined for optimal heat exchange.
Temperature stability is another ordinary factor for heat blocks. The range of temperature is typically within 2 centigrade. The temperature inside the walls of the heat block is consistent. In general, dry baths have been utilized mostly for heating purpose. However, the latest series has been equipped with compressors which consider cooling a few degrees below ambient room temperature.