What is a datalogger? A datalogger is an electronic instrument that records measurements of temperature, relative humidity, light intensity, on-off and open-closed state changes, voltage, and events over extended periods of time. Typically, dataloggers are small, standalone, battery-powered devices that are equipped with a microprocessor, memory for data storage, and sensor(s). Most dataloggers interface with a personal computer and utilize software to activate the logger and view/analyze the collected data.
Another benefit is the ability to collect data in hard-to-reach areas through the use of built-in or external sensors. Temperature, relative humidity, CO2, voltage, amperage, pressure, light, and many other types of data can be monitored in areas that would otherwise be too difficult or cumbersome to access such as electrical junction boxes, air return vents, water recovery tanks, motor and fan housings, to name a few. Loggers with external input capabilities may be wired to existing gauges and sensors that have voltage output terminals, thereby allowing these devices to be monitored and recorded, too.