GTC505-CSC 2m cable with clip-on spark plug sensor

  • Use in conjunction with the GTC505 engine ignition analyzer, to take measurements of the ignition system from a remote position.


        The GTC505-CSC is an accessory item for the GTC505 – it consists of a 2 m long coaxial cable with connectors, and a clip-on spark plug wire sensor specially designed for use with the GTC505 Engine Ignition Analyzer.

        The clip-on sensor locks with a single twist onto the spark plug wire, and when connected through the extension cable to the GTC505, allows to take measurements of the ignition system from a remote position.

  Proposition 65 Warning

This product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer, and Bisphenol A (BPA), which is known to the State of California to cause birth defects or other reproductive harm. For more information go to


  • Clip-On Sensor
    • Sensor type: Capacitive type
    • Body material: Nylon
    • Spark plug wire opening: 8.5 mm (0.33″)
    • Size: 24 diameter (0.94″) x 75 mm (2.95″) lenght
    • Weight: 16 g (0.6 oz)
  • Extension cable
    • Type: Shielded coaxial
    • Jacket: PVC
    • Connectors: BNC and 5.5 mm diameter coaxial barrel type
    • Size: 2 m (74″) long x 5 mm (0.2″) diameter
    • Weight: 85 g (3.0 oz)


Small Engines

    Small engines without alternators use magneto ignition systems. The engines with alternators usually use distributor or capacitive discharge ignition systems.
General Technologies recommends using either the TA100 or GTC505 when working with small engines. The TA100 is economical and easy-to-use; it helps you set idles, and check for major spark issues. The GTC505 can help you find issues at particular RPMs, and gives you more information on how the ignition system responds to loads. The GTC505 is also good if you want a tool that will work on larger (automotive or marine) engines.

Motorcycle Engines

    Modern motorcycle engines generally use coil-on-plug ignition systems (, often pencil-type modules). Older motorcycles used distributors or magnetos depending on their size and number of cylinders.
General Technologies recommends the TA100 for people who are only working on vintage motorcycles, and the GTC505 for those who want to work on all kinds of bike. The TA100 is economical, and good for setting idles or checking for fouled plugs on magneto or distributor-type systems. The GTC505 works on all kinds of systems, and can help you diagnose complicated problems.

Marine Engines

    Small marine engines (<25hp) generally use magneto ignition systems. Large, old marine engines use distributor ignition systems. Since 2015, larger marine engines have started to use coil-on-plug ignition systems.
General Technologies recommends that marine engine technicians working on newer engines use the TA500 or GTC505. The GTC505 is best for technicians looking to do in-depth diagnostics, such as finding occasional misfires. The TA500 is good for less detailed work, like setting idle speeds and checking for fouled plugs.

Automotive Engines

    Modern (gasoline) automotive engines are coil-on-plug based. Most cars manufactured before 2005 use distributor ignition systems, though there are also a few that used capacitive discharge systems.

General Technologies recommends using a GTC505 for these applications, because it is compatible with COPs, and can help you diagnose occasional misfires


  • Clip-on spark plug wire sensor:
    • Fits up to 8 mm diameter spark plug wires
    • Twist to clip-on and release from spark plug wire
    • Shielded capacitive sensor minimizes interference from nearby spark plug wires
    • Electrically insulated molded body
    • Clip-on sensor
  • Extension cable:
    • 2 m (74”) long with BNC and sensor connectors
    • Electrically shielded coax
    • It can be use with the clip-on spark plug sensor, and GTC505’s coil on plug (COP) and spark plug wire sensors


What is the difference between the GTC505, the GTC505m, and the GTC505-CSC?

    The GTC505 is an engine ignition analyzer. The most basic kit it comes in: with a flexible probe, extension cable, cop sensor, spw sensor, USB micro cable and AC charger adapter, user’s manual, 1 year warranty, and hard padded carrying case.

    The GTC505m is an upgraded version of the GTC505 kit – it comes with everything in the GTC505 kit, but with the GTC505-CSC accessory, and a larger hard padded carrying case to accommodate the extra accessory.

The GTC505-CSC can be purchased separately (here), or together with the analyzer in the GCT505m kit.

GTC505-CSC GTC505 GTC505m
Engine Ignition Analyzer
Flexible Probe
Coil on plug (COP) active sensor
Spark plug wire (SPW) shielded capacitive sensor
Clip-on spark plug wire capacitive sensor
Extension cable with BNC and sensor connector
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


Brochure: GTC505CSC-BREN

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