Free Engineering Tools
Instrumentation Tools
Decoders, reference charts and tuning tools for instrumentation and control engineers. Each tool follows the relevant standard and explains every result.
10sections
51live tools
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Tool Sections
2 toolsInstrument Tag DecoderDecode ISA 5.1 instrument tags and look up every identification letter.4 toolsIP, NEMA and Ex Rating DecoderDecode IP codes, NEMA enclosure types, ATEX and IECEx Ex markings and hazardous area zones.4 toolsWire and Cable Color CodesWire colour codes for power, control panels, thermocouples and RTDs by standard.6 toolsPID Tuning ToolsPID tuning calculators, PID form converter and an online PID loop simulator.4 toolsP&ID SymbolsSearchable P&ID symbols for instruments, lines, valves and flow elements.3 toolsPipe and Flange ChartsPipe schedules, ASME B16.5 flange dimensions and pressure ratings.4 toolsThread Size ChartsNPT, BSP and metric thread sizes and a thread identifier for instrument fittings.8 toolsCommunication ProtocolsModbus address, float and CRC tools, RTU timing, RS485 rules and HART commands.8 toolsTroubleshooting GuidesInteractive fault finders for transmitters, flowmeters, valves and loops.8 toolsPractice TestsInstrumentation quizzes with instant scores and explained answers.
All Instrumentation Tools
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Instrument Tag Decoder2
IP, NEMA and Ex Rating Decoder4
IP, NEMA and Ex Rating DecoderIP Rating Decoder (IEC 60529)IEC 60529, Dust protectionIP, NEMA and Ex Rating DecoderNEMA Enclosure Types and IP EquivalentsNEMA 250, NEMA 4XIP, NEMA and Ex Rating DecoderEx Marking Decoder (ATEX and IECEx)ATEX, IECExIP, NEMA and Ex Rating DecoderHazardous Area Zones, EPL and ATEX CategoriesZone 0, 1, 2, Zone 20, 21, 22
Wire and Cable Color Codes4
Wire and Cable Color CodesElectrical Wire Color Codes (IEC, India, UK, US)IEC 60445, India R Y BWire and Cable Color CodesControl Panel Wiring Color Code (IEC 60204-1 and NFPA 79)IEC 60204-1, NFPA 79Wire and Cable Color CodesThermocouple Color Codes (IEC and ANSI)IEC 60584-3, ANSI MC96.1Wire and Cable Color CodesRTD Wire Color Code and Instrument Cable ColoursIEC 60751, Pt100 3 wire
PID Tuning Tools6
PID Tuning ToolsZiegler–Nichols PID Tuning CalculatorClosed loop Ku, Pu, Open loop step testPID Tuning ToolsCohen–Coon PID Tuning CalculatorFOPDT model, Dead timePID Tuning ToolsLambda and IMC PID Tuning CalculatorLambda tuning, IMC rulesPID Tuning ToolsPID Form Converter (Ideal, Series, Parallel)Ideal (ISA), Series (interacting)PID Tuning ToolsProportional Band and Reset Rate ConverterGain ↔ PB, Minutes per repeatPID Tuning ToolsPID Loop SimulatorFOPDT process, Live plot
P&ID Symbols4
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Pipe and Flange Charts3
Thread Size Charts4
Communication Protocols8
Communication ProtocolsModbus Register Address Calculator40001 to 0, Function codesCommunication ProtocolsModbus Float Converter (IEEE 754, Two Registers)IEEE 754, ABCD, CDABCommunication ProtocolsModbus RTU CRC 16 CalculatorCRC 16/MODBUS, Low byte firstCommunication ProtocolsModbus RTU Frame DecoderRequest and response, Exception codesCommunication ProtocolsModbus RTU Timing and Poll Time CalculatorCharacter time, t3.5 intervalCommunication ProtocolsRS485 Cable Length and Baud Rate GuideLength vs speed, Unit loadsCommunication ProtocolsHART Command List and LookupUniversal commands, Common practiceCommunication ProtocolsIndustrial Communication Protocols ComparisonHART and Modbus, Profibus and FF
Troubleshooting Guides8
Troubleshooting GuidesPressure Transmitter Fault FinderNo output, Stuck readingTroubleshooting GuidesDP Flow Transmitter Fault FinderReads high or low, No flow shownTroubleshooting GuidesMagnetic Flowmeter Fault FinderEmpty pipe alarm, Noisy readingTroubleshooting GuidesLevel Transmitter Fault FinderRadar level, DP levelTroubleshooting GuidesThermocouple and RTD Fault FinderOpen sensor, Reads high or lowTroubleshooting GuidesControl Valve Fault FinderNot moving, HuntingTroubleshooting Guides4 to 20 mA Loop Fault Finder0 mA, Low currentTroubleshooting GuidespH Sensor Fault FinderLow slope, Offset error
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Practice Tests8
Practice TestsPressure Measurement Quiz15 questions, Instant scorePractice TestsFlow Measurement Quiz15 questions, Instant scorePractice TestsLevel Measurement Quiz15 questions, Instant scorePractice TestsTemperature Measurement Quiz15 questions, Instant scorePractice TestsControl Valve and PID Quiz15 questions, Instant scorePractice TestsPLC, 4 to 20 mA and Modbus Quiz15 questions, Instant scorePractice TestsSIS and Hazardous Area Quiz15 questions, Instant scorePractice TestsCalibration and Metrology Quiz15 questions, Instant score
Frequently Asked Questions
Are these instrumentation tools free?
Yes. Every tool is free, works on mobile and desktop, and needs no download or sign up.
What tools are available?
Instrument tag decoding, IP, NEMA and Ex marking decoders, wire colour codes, PID tuning with a simulator, Modbus and HART protocol tools, interactive troubleshooting guides, practice quizzes, P&ID symbols, pipe and flange charts and thread charts.
How is this different from the calculators?
Calculators solve engineering equations. Tools decode, look up and explain field information such as tags, markings, colour codes and tuning rules.
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