Hey!

yes definitely, you can apply for M.Tech in biomedical engineering after your undergraduation (BE/Btech) in Instrumentation. Also, you can apply for GATE exam if you wish to take admission in a good college. Also, as biomedical is entirely different from instrumentation, you need to work hard, and make your fundamentals strong in human science and biology. Kindly note that you must have at least 60% in your undergraduation.

Thankyou