Get information from the specific neuron

Hello. Is there are any handy technique that I can use if I want to get the information (the result of an activation) from the specific neuron (or neurons) from the particular layer of the model?

I mean, for example, that I want to process an activation results of the 20th and the 22nd neurons (the neurons should be the same on each run of the model) on the 2nd layer outside the main model. Or activate/read specific neurons in the model using the data outside of the model. How can I do this?