*S

Here’s a list of Instrumentation abbreviations starting with the letter “S”, commonly used in P&IDs, datasheets, control systems, and field instrumentation.

S: Switch / Sensor / Signal (context dependent)
SA: Sensor Alarm / System Alarm
SAC: Sensor Alarm Controller / System Alarm Controller
SAM: Sensor Alarm Module
SB: Signal Bus / System Bus
SBC: Signal Bus Controller / System Bus Controller
SC: Sensor Controller / System Controller
SCA: Sensor Control Assembly / System Control Assembly
SCC: Sensor Control Cabinet / System Control Cabinet
SCD: Sensor Control Device / System Control Device
SCM: Sensor Control Module / System Control Module
SCP: Sensor Control Panel / System Control Panel
SCS: Sensor Control System / System Control System
SD: Sensor Device / Shutdown Device
SDC: Sensor Device Controller / Shutdown Device Controller
SDD: Sensor Detection Device / Shutdown Device Device
SE: Sensor Element / System Element
SF: Sensor Filter / Signal Filter / System Filter
SFC: Sensor Flow Controller / System Flow Controller
SFD: Sensor Flow Device / Signal Flow Device
SFM: Sensor Flow Meter / System Flow Module
SG: Sensor Gauge / System Gauge
SH: Sensor High / System High
SI: Sensor Indicator / System Indicator
SIC: Sensor Indicating Controller / System Indicating Controller
SIM: Sensor Interface Module / System Interface Module
SL: Sensor Low / System Low
SLA: Sensor Low Alarm / System Low Alarm
SLC: Sensor Low Controller / System Low Controller
SLD: Sensor Low Device / System Low Device
SLI: Sensor Low Indicator / System Low Indicator
SLT: Sensor Low Transmitter / System Low Transmitter
SM: Sensor Module / System Module / Signal Module
SMC: Sensor Module Controller / System Module Controller
SN: Sensor Node / Signal Node / System Node
SO: Sensor Output / System Output
SOC: Sensor Output Controller / System Output Controller
SOM: Sensor Output Module / System Output Module
SP: Set Point / Sensor Point / System Point
SPC: Set Point Controller / Sensor Point Controller
SPD: Sensor Pressure Device / System Pressure Device
SPI: Sensor Pressure Indicator / System Pressure Indicator
SPT: Sensor Pressure Transmitter / System Pressure Transmitter
SR: Sensor Recorder / System Relay
SRC: Sensor Recorder Controller / System Relay Controller
SRD: Sensor Relay Device / System Relay Device
SS: Sensor Switch / System Switch
SSC: Sensor Switch Controller / System Switch Controller
SSD: Sensor Shutdown Device / System Shutdown Device
SSI: Sensor Status Indicator / System Status Indicator
SSM: Sensor Signal Module / System Signal Module
ST: Sensor Transmitter / System Transmitter / Set Temperature
STC: Sensor Temperature Controller / System Temperature Controller
STD: Sensor Trip Device / System Trip Device
STI: Sensor Temperature Indicator / System Temperature Indicator
STT: Sensor Temperature Transmitter / System Temperature Transmitter
SV: Sensor Valve / System Valve
SVC: Sensor Valve Controller / System Valve Controller
SVM: Sensor Valve Module / System Valve Module