Amprobe TR200-A [3477302] Temperature and Relative Humidity Data Logger. The Amprobe TR200-A takes both temperature and relative humidity readings in one compact size unit. The TR200A is wall mountable and is used for indoor air quality monitoring. The air temperature displays in Celsius or Fahrenheit and offers visible LEDs warnings to monitor IAQ condition. Use the included Amprobe software for recording measurements to your personal computer. Set up these parameters for recording: sample interval timing, start/stop, date and time, hi/lo alarm threshold, unit selection, and number of memory points.