Download of Rotronic SW21 1.3.0.15317 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular version of the software is 1.1. Commonly, this program's installer has the following filename: SW21.exe.
The software lies within System Utilities, more precisely Device Assistants. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This free PC software was developed to work on Windows XP, Windows 7, Windows 8, Windows 10 or Windows 11 and is compatible with 32-bit systems. This free program is an intellectual property of ROTRONIC AG.
From the developer:
Rotronic SW21 is a complementary program designed for configuring and downloading of data from CP11, CL11, CO2 Display and HF1. The program is capable of displaying measured values in tabular or graphic form. It can also detect automatically the connected devices.
You may want to check out more software, such as ROTRONIC HW4, which might be similar to Rotronic SW21.