To simulate the MQ135 Gas Sensor in Proteus, you must download and manually add external library files to the software’s installation directory. Proteus does not include these sensors by default. Download Sources for MQ135 Library The most reliable current sources providing functional files for Proteus 7 and 8 include: The Engineering Projects (TEP)
Alternative Path: C:\Program Files (x86)\Labcenter Electronics\Proteus 8 Professional\Data\LIBRARY. mq135 gas sensor library for proteus download upd work
Proteus ships with generic sensors (temperature, pressure, etc.) but lacks many specific gas sensors due to: To simulate the MQ135 Gas Sensor in Proteus,
MQ135.HEX: This is the "internal" code for the sensor. Critical Step: You must double-click the sensor in your schematic and link this .hex file in the "Program File" section for it to function. mq135 gas sensor library for proteus download upd work