The circuit is from 80s Siliconix documentation. The integrated circuit is from the company and is not common today. It can be used operational equivalent more common in our times.
January 2017 - The new Honeywell RSC TruStability ™ pressure sensor mounting board is available from...
The IC used in this project is not common these days, but if you have one you can build a high...
June 2016 - It can be obtained from Mouser Electronics the new gate driver optocoupler from...