*W

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

W: Water / Weight / Watt / Warning (context dependent)
WA: Water Alarm / Warning Alarm
WAC: Water Alarm Controller / Warning Alarm Controller
WAM: Water Alarm Module / Warning Alarm Module
WB: Water Bus / Weight Bus
WBC: Water Bus Controller / Weight Bus Controller
WC: Water Controller / Weight Controller / Warning Controller
WCA: Water Control Assembly / Weight Control Assembly
WCC: Water Control Cabinet / Weight Control Cabinet
WCD: Water Control Device / Weight Control Device
WCM: Water Control Module / Weight Control Module
WCP: Water Control Panel / Weight Control Panel
WCS: Water Control System / Weight Control System
WD: Water Detector / Weight Device
WDC: Water Detector Controller / Weight Device Controller
WDD: Water Detection Device / Weight Detection Device
WE: Water Element / Weight Element
WF: Water Flow / Weight Flow / Watt Filter
WFC: Water Flow Controller / Weight Flow Controller
WFD: Water Flow Device / Weight Flow Device
WFM: Water Flow Meter / Weight Flow Module
WG: Water Gauge / Weight Gauge / Watt Gauge
WH: Water High / Weight High / Warning High
WI: Water Indicator / Weight Indicator / Warning Indicator
WIC: Water Indicating Controller / Weight Indicating Controller
WIM: Water Interface Module / Weight Interface Module
WL: Water Low / Weight Low / Warning Low
WLA: Water Low Alarm / Warning Low Alarm
WLC: Water Low Controller / Weight Low Controller
WLD: Water Low Device / Weight Low Device
WLI: Water Low Indicator / Weight Low Indicator
WLT: Water Low Transmitter / Weight Low Transmitter
WM: Water Module / Weight Module / Watt Module
WMC: Water Module Controller / Weight Module Controller
WN: Water Node / Weight Node
WO: Water Output / Weight Output
WOC: Water Output Controller / Weight Output Controller
WOM: Water Output Module / Weight Output Module
WP: Water Point / Weight Point / Warning Point
WPC: Water Point Controller / Weight Point Controller
WPD: Water Pressure Device / Weight Pressure Device
WPI: Water Pressure Indicator / Weight Pressure Indicator
WPT: Water Pressure Transmitter / Weight Pressure Transmitter
WR: Water Recorder / Weight Relay / Warning Relay
WRC: Water Recorder Controller / Weight Relay Controller
WRD: Water Relay Device / Weight Relay Device
WS: Water Switch / Weight Switch / Warning Switch
WSC: Water Switch Controller / Weight Switch Controller
WSD: Water Shutdown Device / Weight Shutdown Device
WSI: Water Status Indicator / Weight Status Indicator
WSM: Water Signal Module / Weight Signal Module
WT: Water Transmitter / Weight Transmitter / Warning Transmitter
WTC: Water Temperature Controller / Weight Temperature Controller
WTD: Water Trip Device / Weight Trip Device
WTI: Water Temperature Indicator / Weight Temperature Indicator
WTT: Water Temperature Transmitter / Weight Temperature Transmitter
WV: Water Valve / Weight Valve / Warning Valve
WVC: Water Valve Controller / Weight Valve Controller
WVM: Water Valve Module / Weight Valve Module