Data loggers are modern digital devices that document temperature. They are set to take a temperature sample every so often. The interval can be seconds, minutes or even hours. For example, if a refrigerator is being monitored the data logger can be set to take a temperature reading every 10 minutes and store it in its RAM memory. At some point the stored data will be downloaded to a computer where it can be plotted as a graph or shown as a numeric listing.

Some data loggers even have displays which show the temperature chart on the instrument itself. So the user can see a chart of the temperature history without having to download the data logger to a computer. These instruments are called Data Viewers or paperless chart recorders, although the perform precisely the same function as data loggers.

Many people use data loggers to monitor the temperature in a freezer or in a pharmaceutical storage facility, but they are also used to monitor oven temperature and other manufacturing processes.

A high temperature data logger (a logger with sensors capable of measuring high temperatures) can be used in laboratories, manufacturing plants and even bakeries. Literally any place where temperature plays a role in producing a product or affects the life of stored inventory is a potential spot where a data logger can be employed.

Data loggers are priceless tools for museums and art galleries where they monitor and document temperature and humidity. Art works and paintings must be maintained in rigidly controlled environments or they deteriorate. Museums that regularly loan or borrow exhibits from other museums must be able to document their interior environmental conditions to the loaner facility. They can also be employed for investigating building operational problems, checking voltage and amperage in energy lines and many, many more. The only thing that limits them is which sensors are installed.
Humidity monitors

Temperature data loggers such can be used to monitor and alert personnel if temperature or humidity moves outside a 'safe range. Knowing the relative humidity (RH) is important in every place where there are any moisture sensitive goods stored. Cigars, musical instruments and clothes – all these goods may be damaged or even destroyed by rapid RH changes. Drums heads can split, guitars can fall apart and paintings can darken – all because of improper RH level.

High temperature sensors such as thermocouples can increase the data loggers usefulness. Wherever there are heaters or ovens to monitor, a high temperature data logger will be handy. They can also be used for temperature monitoring of ongoing experiments in a lab as easily as they can be used to check the temperature in ironworks furnace. Data loggers (even high temperature ones) are relatively inexpensive and can even be used by small businesses, like pizzerias and bakeries.

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Article Submitted By: Joshep Tobin
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