Click play, open the Virtual Terminal, and click the arrows on the MQ135 to see the sensorValue change. 5. Troubleshooting: Why is the Model Not Working? If you are facing issues, check these:
If you have already downloaded the MQ135 library and want to update it to the latest version, follow these steps:
C:\Program Files (x86)\Labcenter Electronics\Proteus 7 Professional\LIBRARY 3. Configure the Sensor in your Schematic
MQ135SensorTEP.LIB (or similar name depending on the creator) MQ135SensorTEP.IDX Step-by-Step Installation Guide for Proteus mq135 gas sensor library for proteus download upd work
This article provides the best sources to download the , instructions on how to install it, and tips to ensure it works properly in your simulation. What is the MQ-135 Gas Sensor Library?
You can find the updated MQ135 library on platforms like GitHub or The Engineering Projects . The download typically includes three essential files: (The component library) MQ135.IDX (The index for the library) MQ135.HEX (The simulation model file) 2. Installation Steps
: Close and reopen Proteus to refresh the component database. How to Simulate Pick Component : In Proteus "Component Mode," search for and place it on your schematic. Load Hex File : Double-click the MQ135 component. In the Program File field, click the folder icon and select the file you downloaded earlier. : Most Proteus gas sensors include a "Test Pin." Use a Logic State Toggle Switch Click play, open the Virtual Terminal, and click
For Proteus 8 and above: C:\ProgramData\Labcenter Electronics\Proteus 8 Professional\Data\LIBRARY
Proteus Design Suite is the gold standard for simulating electronic circuits before physically implementing them. However, one major frustration for engineers is the lack of ready-to-use models for modern sensors. The (used for detecting NH3, NOx, alcohol, benzene, smoke, and CO2) is a perfect example. You won’t find it in the default Proteus library.
Tip: Right-click Proteus shortcut → Open file location to find the install directory. If you are facing issues, check these: If
: Usually found in C:\Program Files (x86)\Labcenter Electronics\Proteus 7 Professional\LIBRARY .
Changing the logic state (0 or 1) or varying the voltage on this pin mimics the fluctuation of gas concentrations in the air.