Sierra Instruments & Controls supplies Pressure Transmitters for General Applications. Sierra Instruments & Controls covers several segments including Consultancy: Process Instruments & Control System, Project: Turnkey PLC/SCADA Control system Integration, Machine Vision: Camera Inspection system for Quality Assurance, etc. Pressure Transmitters for General Applications have two sets of models; one belonging to Standard Series with Model number S-10 and another belonging to Flush Diagram Series with Model number S-11.