P : PRESSURE
PI : PRESSURE INDICATOR
PG : PRESSURE GAUGE
PCV : PRESSURE CONTROL VALVE
PT : PRESSURE TRANSMITTER
PIT : PRESSURE INDICATING TRANSMITTER
PIC : PRESSURE INDICATING CONTROLLER
PDT : PRESSURE DIFFERENTIAL TRANSMITTER
PRV : PRESSURE REDUCING VALVE
PSV : PRESSURE SAFETY VALVE
PS : PRESSURE SWITCH
PSH : PRESSURE SWITCH HIGH
PSL : PRESSURE SWITCH LOW
PSHH : PRESSURE SWITCH HIGH HIGH
PSLL : PRESSURE SWITCH LOW LOW
PDS : PRESSURE DIFFERENTIAL SWITCH
PDSH : PRESSURE DIFFERENTIAL SWITCH HIGH
PDSL : PRESSURE DIFFERENTIAL SWITCH LOW
PA : PRESSURE ALARM TEMPERATURE
T : TEMPERATURE
TI : TEMPERATURE INDICATOR
TW : THERMOWELL
TM : THERMOMETER
TE : TEMPERATURE ELEMENT
RTD : RESISTANCE TEMPERATURE DETECTOR
T/C : THERMOCOUPLE
TT : TEMPERATURE TRANSMITTER
TIC : TEMPERATURE INDICATING CONTROLLER
TRC : TEMPERATURE RECORDER CONTROLLER
TCV : TEMPERATURE CONTROL VALVE
TS : TEMPERATURE SWITCH
TSH : TEMPERATURE SWITCH HIGH
TSL : TEMPERATURE SWITCH LOW
TA : TEMPERATURE ALARM FLOW
F : FLOW
FI : FLOW INDICATOR
FG : FLOW GLASS / FLOW GAUGE
FE : FLOW ELEMENT
FIT : FLOW INDICATING TRANSMITTER
FCV : FLOW CONTROL VALVE
FIC : FLOW INDICATING CONTROLLER
FS : FLOW SWITCH
FY : FLOW CONVERTER
FA : FLOW ALARM
FR : FLOW RECORDER
FRC : FLOW RECORDING CONTROLLER
LEVEL
L : LEVEL
LI : LEVEL INDICATOR
LG : LEVEL GAUGE
LIT : LEVEL INDICATING TRANSMITTER
LCV : LEVEL CONTROL VALVE
LDT : LEVEL DISPLACER TRANSMITTER
LIC : LEVEL INDICATING CONTROLLER
LRC : LEVEL RECORDING CONTROLLER
LS : LEVEL SWITCH
LSH : LEVEL SWITCH HIGH
LSL : LEVEL SWITCH LOW
LA : LEVEL ALARM
RLT : RADAR LEVEL TRANSMITTER