What is a Data Logger?
A data logger (or datalogger), commonly referred to as a 'HOBO', is an electronic instrument that records measurements (temperature, relative humidity, light intensity, on/off, open/closed, voltage, pressure and events) over time. Typically, data loggers are small, battery-powered devices that are equipped with a microprocessor, data storage and sensor. Most data loggers utilize turn-key software on a personal computer to initiate the logger and view the collected data. Where are data loggers used? Who uses them? Data loggers are used in remote areas or anywhere you want the convenience of battery power to record measurements. They are ideal for those involved with field studies, transportation monitoring, HVAC tests, troubleshooting, quality studies, general research, and educational science. Hobbyists can even use data loggers, such as a temperature and humidity data logger or a wind data logger, since they are economically priced and easy-to-use. Data loggers can be used in a wide variety of applications. Their small size makes data loggers ideal for mounting in out-of-the-way locations. How does a data logger work? First, the data logger is connected to a personal computer. Then the turn-key data logging software is used to select logging parameters (sampling intervals, start time, etc.) and initiate the logger. The logger is then disconnected and deployed in the desired location. The logger records each measurement and stores it in memory along with the time and date. The logger is then reconnected to the personal computer and the software is used again to readout the data and see the measurements as a graph, showing the profile over time. The tabular data can be viewed as well, or exported to a spreadsheet for further manipulation.