Definitions for "Datalogger"
a device that monitors and records information for you
a device that records measurements such as temperature, relative humidity, meter counter, etc
an electronic instrument that records measurements of temperature, relative humidity, light intensity, voltage, pressure, on/off and open/closed state changes etc
Also known as Measurement and Control System or Micrologger©. Dataloggers are the brain of a data acquisition system. They make measurements at a specified scan rate, process data, and initiate telecommunications. Our dataloggers also have control capabilities allowing them to automatically respond to a specified conditions by controlling external devices (e.g., opening flood gates, turning fans off/on).
Keywords:  serial, port, self, supply, interface
a self-contained serial port interface which has its own power supply and memory to allow it to collect and store data over time