*E

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

E: Electrical / Emergency / Energy (context dependent)
EA: Emergency Alarm / Electrical Actuator
EAC: Electrical Actuator Controller
EAI: Enterprise Application Integration
EAL: Emergency Alarm Level
EAS: Emergency Alarm System
EB: Emergency Break / Earth Bus
EBC: Emergency Backup Controller
EBD: Emergency Blowdown
EBV: Emergency Block Valve
EC: Electrical Control / Enclosure
ECA: Electrical Control Assembly
ECC: Electrical Control Cabinet
ECD: Electrical Control Device
ECM: Electronic Control Module
ECP: Electrical Control Panel
ECS: Emergency Control System / Environmental Control System
ED: Emergency Device
EDA: Emergency Dump Alarm
EDC: Emergency Dump Controller
EDD: Emergency Dump Device
EDS: Emergency Depressurization System
EDV: Emergency Dump Valve
EE: Electrical Equipment
EF: Emergency Function / Emergency Flow
EFC: Emergency Flow Controller
EFD: Emergency Flow Detector
EFS: Emergency Flare System
EG: Exhaust Gas / Emergency Generator
EGC: Exhaust Gas Controller
EGT: Exhaust Gas Temperature
EH: Electro-Hydraulic
EHC: Electro-Hydraulic Controller
EHS: Emergency Shutdown / Environmental Health & Safety
EI: Electrical Indicator
EIA: Electronic Industries Alliance
EIC: Electrical Indicator Controller
EIM: Electric Instrument Motor
EIP: Ethernet/IP
EL: Elevation / Electrical Load
ELA: Emergency Lighting Alarm
ELC: Electronic Level Controller
ELD: Earth Leakage Detector
ELI: Electrical Level Indicator
ELM: Electrical Load Monitor
ELP: Electric Linear Positioner
EM: Electric Motor / Emergency Mode
EMC: Electromagnetic Compatibility
EMD: Electric Motor Drive
EMF: Electromotive Force
EMI: Electromagnetic Interference
EMS: Energy Management System / Emergency Monitoring System
EN: European Norm
ENC: Enclosure
EP: Electrical Power / Electro-Pneumatic
EPA: Environmental Protection Agency
EPB: Emergency Push Button
EPD: Electrical Power Distribution
EPC: Engineering, Procurement & Construction
EPG: Emergency Power Generator
EPI: Electrical Position Indicator
EPM: Electric Power Meter
EPR: Emergency Pressure Relief / Exhaust Pressure Regulator
EPS: Emergency Power Supply
EPT: Electrical Pressure Transmitter
EQ: Equipment
ER: Emergency Release / Event Recorder
ERC: Emergency Relief Controller
ERT: Emergency Response Team / Emergency Reset Trip
ES: Emergency Shutdown / Electrical Switch
ESA: Emergency Shutdown Alarm
ESD: Emergency Shutdown Device
ESDV: Emergency Shutdown Valve
ESI: Emergency Shutdown Initiator
ESL: Emergency Shutdown Logic
ESM: Emergency Shutdown Module
ESP: Electrostatic Precipitator
ESS: Emergency Shutdown System / Energy Storage System
ET: Electrical Transmitter
ETC: Electronic Temperature Controller
ETD: Emergency Trip Device
ETH: Ethernet
ETS: Emergency Trip Switch
EU: Engineering Unit
EUV: Emergency Utility Valve
EV: Electric Valve / Emergency Valve
EVC: Electric Valve Controller
EVM: Electric Valve Motor
EW: Emergency Water
EX: Explosion Proof / Hazardous Area
EXD: Explosion Proof (Flameproof) – d
EXI: Intrinsically Safe – i
EXP: Explosion
EXT: External