*P

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

P: Pressure / Pump / Process (context dependent)
PA: Pressure Alarm / Process Alarm
PAC: Pressure Alarm Controller / Process Alarm Controller
PAM: Pressure Alarm Module
PB: Pump Block / Pressure Bus
PBC: Pump Block Controller / Pressure Bus Controller
PC: Pressure Controller / Process Controller
PCA: Pressure Control Assembly / Process Control Assembly
PCC: Pressure Control Cabinet / Process Control Cabinet
PCD: Pressure Control Device / Process Control Device
PCM: Pressure Control Module / Process Control Module
PCP: Pressure Control Panel / Process Control Panel
PCS: Pressure Control System / Process Control System
PD: Pressure Detector / Pump Drive
PDC: Pressure Detector Controller / Pump Drive Controller
PDD: Pressure Detection Device / Pump Drive Device
PDS: Pressure Detection System
PE: Pressure Element / Process Element
PF: Pressure Filter / Pump Filter / Process Filter
PFC: Pressure Flow Controller / Pump Flow Controller
PFD: Pressure Flow Device
PFM: Pressure Flow Meter / Pump Flow Meter / Process Flow Module
PG: Pressure Gauge
PH: Pressure High / Process High
PHA: Pressure High Alarm / Process High Alarm
PHC: Pressure High Controller / Process High Controller
PHD: Pressure High Device
PHI: Pressure High Indicator
PI: Pressure Indicator / Process Indicator
PIC: Pressure Indicating Controller / Process Indicating Controller
PIM: Pressure Interface Module / Process Interface Module
PL: Pressure Low / Process Low
PLA: Pressure Low Alarm / Process Low Alarm
PLC: Pressure Low Controller / Process Low Controller / Programmable Logic Controller
PLD: Pressure Low Device / Process Low Device
PLI: Pressure Low Indicator / Process Low Indicator
PLS: Pressure Level Switch / Process Level Switch
PLT: Pressure Low Transmitter / Process Level Transmitter
PM: Pressure Meter / Pump Module / Process Module
PMC: Pressure Module Controller / Process Module Controller
PN: Pressure Node / Pump Node
PO: Pump Outlet / Process Output
POC: Pump Output Controller / Process Output Controller
POM: Pump Output Module / Process Output Module
PP: Pump Panel / Process Point / Pressure Point
PPC: Pump Panel Controller / Process Point Controller
PPD: Pressure/Process Point Device
PPI: Pressure/Process Point Indicator
PPT: Pressure/Process Point Transmitter
PR: Pressure Recorder / Pump Relay / Process Relay
PRC: Pressure Recorder Controller / Process Relay Controller
PRD: Pressure Relay Device / Process Relay Device
PS: Pressure Switch / Pump Switch / Process Switch
PSC: Pressure Switch Controller / Process Switch Controller
PSD: Pressure Shutdown Device / Process Shutdown Device
PSI: Pressure Status Indicator / Process Status Indicator
PSM: Pressure Signal Module / Process Signal Module
PT: Pressure Transmitter / Pump Transmitter / Process Transmitter
PTC: Pressure Temperature Controller / Process Temperature Controller
PTD: Pressure Trip Device / Process Trip Device
PTI: Pressure Temperature Indicator / Process Temperature Indicator
PTT: Pressure Temperature Transmitter / Process Temperature Transmitter
PV: Pressure Valve / Pump Valve / Process Valve
PVC: Pressure Valve Controller / Process Valve Controller
PVM: Pressure Valve Module / Process Valve Module