As you want to get the details of career after B.Tech Instrumentation Engineering so here is the information of the same for you:

B.Tech. Instrumentation & Control Engineering Job Types
Lead Instrumentation Design Engineer
Engineer - Instrumentation and Control
Manager Instrumentation
Officer - Instrumentation
Instrumentation Site Engineer
Instrumentation Engineer
Senior Design Engineer - Instrumentation
Executive - Instrumentation and Documentation
Proto Instrumentation Technician
Principle Designer - Control and Instrumentation
Trainee Engineer - Instrumentation

Advance Courses in B.Tech. Instrumentation & Control Engineering
M.Tech. (Instrumentation and Control Engineering)
Ph.D. (Instrumentation and Control Engineering)

How is B.Tech. Instrumentation & Control Engineering Course Beneficial?
The course is also beneficial for further studies such as M.E. and Ph.D. as it provides good base for it.
Engineers can seek employment opportunities in almost all related production industries, hospitals and research institutes.