GTC505 Engine Ignition Analyzer

  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.



  • 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

Useful for troubleshooting:

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

Quick powerful and easy to use

  • Plug the appropiate sensor pick-up into the flexible probe
  • Select the number of cycles of the engine to be measured
  • Select the measurement type and display format
  • Place the pick-up on top of the ignition module, or over the spark plug wire
  • The GTC505 will automatically detect and adjust all parameters to provide accurate measurements and clear graphs

Technical Specifications

  • Display: Color 3.5" 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) long with interchangeable COP and SPW pick-up
  • Internal power Source: 1500 mA/h rechargeable LiFePO4 battery
  • Battery life: Approximately 6 hours of operation 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)
  • Weight: 14.8 oz or 420 g (without probe)


  • 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

Electrical Specifications

  • Input USB-micro connector: 5.0 volt, 500 mA maximum

For use in

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


  • GTC505
  • Flexible probe
  • Coil on plug (COP) pickup
  • Spark plug wire (SPW) pickup
  • 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