Engine Ignition Analyzer

The new GTC505m Engine Ignition Analyzer Kit is recommended.

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  The GTC505 Engine Ignition Analyzer is a handheld instrument designed from the ground up for the diagnosis and performance measurement of all types of spark ignition systems, from conventional to the newest Coil on Plug in use.

  Capable of displaying and measuring the following in real time: secondary ignition waveform, primary coil current ramp time, dwell time, spark burn time and RPM. It also provides two innovative and unique display formats used to compare measurements between cylinders, and to look at data for hundreds of spark events over time in order to detect intermittent problems, misfires and other performance issues which are very difficult to detect using conventional scopes.

  This hand held device is powered by a rechargeable lithium battery, which provides up to 8 hours of battery life and uses a fast response 3.5" color TFT display with a bright backlight and wide viewing angle.

General Technologies Corp. GTC505 Motor Magazine Top 20 Tools Award General Technologies Corp. GTC505 PTEN Innovation Award General Technologies Corp. GTC505 PTEN People's Choice Award


    General Technologies Corp. GTC505 Engine Ignition Analyzer
  • Display waveforms in real time
  • Detect and display dwell angle (in high voltage sparkplug-wire systems), and ramp time (for COP systems)
  • Graph burn time, spark plug voltage, dwell/ramp time, and RPM for each spark, allowing for detection of misfires
  • Compare readings between cylinders with a "candlestick" graph that displays maximum, minimum, and average readings for each cylinder
  • Display everything on a 3.5" color TFT LCD screen
  • Rechargeable Li-Ion battery provide 6+ hours of working time
  • Pass the rigorous "MIL-STD-810" drop test

Multiple sensors and hook-up options:

  • All specially designed for use with the GTC505
  • 2 m (74”) shielded coaxial cable with BNC and sensor connector
  • 30 cm (12”) shielded flexible goosneck with BNC and sensor connector
  • Cable and flexible gooseneck can be use with any sensor
  • Electrically shielded clip-on and spark plug wire sensors fit up to 8 mm diameter wires
  • Active coil on plug (COP) sensor for optimal signal detection and rejection of interferance from other ignition modules
  • Automatic detection and configuration of the sensors
  • Compatible with the 2 m (74”) shielded coaxial clip-on spark plug wire sensor P/N: GTC505-CSC

General Technologies Corp. GTC505 Coil-On-Plug Sensor
Coil on plug sensor
General Technologies Corp. GTC505 Engine Ignition Analyzer Spark Plug Wire Sensor

Spark plug wire sensor

Quick, powerful and easy to use

  • Plug the appropriate sensor pick-up into the flexible probe
  • Select 2-stroke, 4-stroke or waste spark
  • Select the measurement type and display format
  • Place the coil on plug sensor on top of the ignition module, or the spark plug wire sensor over the spark plug wire
  • The GTC505 will automatically detect and adjust all parameters to provide accurate measurements and clear graphs
General Technologies Corp. GTC505 Engine Ignition Analyzer waveform display Displays secondary ignition waveforms General Technologies Corp. GTC505 Engine Ignition Analyzer chart display Unique chart mode makes easier to detect intermittent or infrequent failures and misfires General Technologies Corp. GTC505 Engine Ignition Analyzer comparison display Compare sets of values (minimum, average and maximum readings) between several cylinders Analog gauge and digital readout with maximum and minimum Works on 2-stroke, 4-stroke, and waste spark ignition system engines Measures and displays spark burn (firing) time, dwell time, current ramp time, RPM, and spark plug peak voltage Every measurement can be displayed in compare mode, chart mode, analog gauge / digital readout or waveforms 6+ hours of working time when starting with a fully charged battery

Useful for troubleshooting:

  • Non-starts
  • Misfires
  • Intermittent problems
  • Primary and secondary coil circuits faults
  • Fouled or damaged spark plugs
  • Damaged spark plug wires

Technical Specifications

  • Display: 3.5" Color TFT (320x240 pixels)
  • Ignition system compatibility: magneto, conventional distributor, waste spark (DIS), coil near plug, coil on plug, etc.
  • Engine cycle: 2, 4 and waste spark (DIS)
  • Probe: 12" (30 cm) 30 cm (12”) long coaxial gooseneck with BNC and sensor connector
  • Coil on plug sensor: Active type, 14 mm x 52 mm
  • Spark plug wire sensor: Shielded capacitive type, 35x13x13 mm, with 8.5 mm opening
  • Input USB-micro connector: 5.0 volt, 500 mA maximum
  • Internal power Source: 1500 mA/h rechargeable LiFePO4 battery
  • Battery life: 6+ hours of working time when starting with a fully charged battery
  • Power Saving: Auto power off
  • Physical dimensions : 6.5"(H) x 4.9"(W) x 1.4"(D)or 165 mm x 124 mm x 36 mm (without probe or cable)
  • Weight: 14.8 oz or 420 g (without probe or cable)


  • Range: 120 to 19,999 RPM
  • Resolution: 1 RPM
  • Accuracy: ±0.5% + 1 LSD

Spark (peak) voltage

  • Range: 0 to 50 kV
  • Resolution: 0.1 kV
  • Repetitivity: ±0.2 kV

Spark burn (firing) time

  • Range: 0 to 10.0 mS
  • Resolution: 0.1 mS
  • Accuracy: ±0.1 mS + 1 LSD

Ignition primary current ramp time (COP mode)

  • Range: 0 to 10.0 mS
  • Resolution: 0.1 mS
  • Accuracy: ±0.1 mS + 1 LSD

Dwell time (spark plug wire)

  • range: 0 to 10.0 mS
  • Resolution: 0.1 mS
  • Accuracy: ±0.1 mS + 1 LSD

For use in

  • Automobiles
  • Trucks
  • Boats
  • Lawnmowers
  • Chainsaw
  • Power generators
  • Marine engines
  • Motorcycles, etc.


  • GTC505
  • Flexible probe
  • Coil on plug (COP) active sensor
  • Spark plug wire (SPW) shielded capacitive sensor
  • USB micro cable and AC charger adapter
  • Protective rubber holster
  • Hard padded case for carrying and storage
  • User's manual
  • 1 year parts and labor warranty