: You can download raw library files directly from satyamkr80's GitHub or Karan-nevage's PROTEUS-LIBRARY , which contains a ZIP file of multiple sensor models. Step-by-Step Installation Guide
To ensure the library works correctly during runtime, connect the sensor to a microcontroller like an Arduino Uno within your schematic. mq135 gas sensor library for proteus download upd work
Select both the .IDX and .LIB files from your extracted folder. Copy them ( Ctrl + C ). : You can download raw library files directly