ExChart RH520 3.0 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The actual developer of the free software is Extech Instruments.
ExChart RH520.exe and ExChartRH520.exe are the most common filenames for this program's installer. The following versions: 3.0 and 1.0 are the most frequently downloaded ones by the program users. This free PC software is compatible with Windows XP/7/8/10/11 environment, 32-bit version. We recommend checking the downloaded files with any free antivirus. The program lies within Education Tools, more precisely Science Tools.
From the developer:
Simultaneous numerical and graphical display of Humidity and Temperature readings, plus Time and DateMeasures Humidity (10 to 95%RH) and Temperature (-20.0°F to 140.0°F) plus calculates Dew Point.Basic accuracy 3%RH, 1.8°F/1°C. Large dual graphical LCD displays with adjustable vertical and horizontal TAC resolution. Internal memory records up to 49,000 data points and can be transferred to a PC via RS-232 serial port for further data analysis.
You may want to check out more software, such as Extech Instruments RH520A, which might be similar to ExChart RH520.