Hantek Electronic Co Ltd
Hantek HT25COP Coil-on-Plug Signal Probe for Automotive Ignition Analysis
Hantek HT25COP Coil-on-Plug Signal Probe for Automotive Ignition Analysis
SKU: HT25COP
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Key Features
Overview
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Why Engineers Choose The Hantek HT25COP Coil-on-Plug Signal Probe for Automotive Ignition Analysis
Non-Intrusive Diagnostics
Professional Accuracy
Versatile Compatibility
Professional Automotive Ignition Diagnostics
The Hantek HT25COP is a specialised capacitive probe designed for non-intrusive testing of coil-on-plug (COP) ignition systems. This professional diagnostic tool enables engineers to capture secondary ignition waveforms directly from the ignition coil without requiring cable extensions or system modifications.
Advanced Coil-on-Plug Testing
Modern vehicles increasingly use COP ignition systems where individual coils mount directly onto spark plugs, eliminating traditional high-voltage spark plug wires. The HT25COP probe addresses this diagnostic challenge by coupling magnetically to the coil's electromagnetic field, enabling oscilloscope analysis of the ignition waveform.
Technical Operation
The probe operates through capacitive coupling, detecting the high-voltage discharge patterns within the ignition coil. When connected to an oscilloscope via the standard BNC connector, engineers can analyse:
- Firing line voltage and duration
- Spark burn time and intensity
- Coil oscillations and decay patterns
- Misfire detection and timing anomalies
Wiring Quick-Start
Connection requires no vehicle modification:
- Connect BNC plug to oscilloscope Channel A
- Attach ground clip to engine earth point
- Position probe sensor against target ignition coil
- Configure oscilloscope: 5-15kV range, 10-20ms timebase
- Set trigger: rising edge, 2-4kV threshold
Diagnostic Applications
| Condition | Waveform Indication |
|---|---|
| Normal Operation | Clean firing line, consistent burn time 1.5-2ms |
| Misfire | Reduced or absent firing line, extended oscillations |
| Carbon Tracking | Multiple firing events, erratic burn patterns |
| Lean Mixture | Increased firing voltage, shortened burn time |
Compatibility
Compatible with most automotive oscilloscopes featuring BNC inputs. Works effectively with Hantek automotive scopes, PicoScope units, and other professional diagnostic equipment. The 2-metre cable length provides sufficient reach for most engine bay configurations.
| General Information | |
|---|---|
Part Number (SKU) |
HT25COP
|
Manufacturer |
Hantek Electronic Co Ltd
|
| Physical and Mechanical | |
Weight |
0.5 kg
|
| Other | |
EAN |
5055383608881
|
Questions and Answers
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Is the Probe Suitable for Hybrid and Electric Vehicles?
Hantek designs the HT25COP for petrol engines with coil-on-plug ignition and does not state hybrid or electric vehicle suitability. A fully electric vehicle has no ignition system to test. On a hybrid's petrol engine, follow the vehicle manufacturer's high-voltage safety procedures.
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How Do I Interpret Abnormal Waveform Patterns?
Hantek states that the ignition waveform can show spark plug wear, fouling and insulation problems, and shows an example misfire waveform. Hantek publishes no reference firing voltages or burn times for this probe. As general practice, compare each cylinder's waveform with the others and with the vehicle manufacturer's data.
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Can the Probe Be Used for Injector Testing?
Not directly. Hantek states that the ignition waveform can help judge whether a fuel injector is working, but the HT25COP is an ignition probe, not an injector sensor. To see injector current, use a current clamp.
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What Safety Precautions Are Necessary During Testing?
- Do not use the probe if the sensor plate's insulation shows signs of damage.
- Keep the probe and leads away from moving belts and fans, and from hot surfaces.
- Never touch coil terminals while the engine is running.
Standard automotive electrical safety practices apply.
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How Does This Compare to More Expensive Diagnostic Probes?
Hantek publishes no comparison with other makers' probes. The HT25COP has a sensor plate on a bendable arm that sits directly on the ignition coil, and a built-in LED work light.
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What Ignition Systems Is the HT25COP Compatible With?
It is for coil-on-plug (COP) ignition systems, where the sensor plate can be placed on the coil. For ignition systems with high-voltage leads, Hantek's HT25 clip-on ignition probe is the matching accessory.
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Does the HT25COP Require Specific Oscilloscope Settings?
Hantek publishes no settings for the HT25COP. The ignition presets on Hantek's 2D82 automotive oscilloscope name the HT25 and HT308 probes, not the HT25COP, so set the scope up manually: start from your scope's secondary ignition settings and adjust the timebase and trigger level until you see a stable firing line.
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How Does the Probe Attach to the Ignition Coil?
There is no wired connection to the coil; the probe uses a sensor plate. Place the plate against the coil housing and the probe picks up the coil's field as it fires. The arm can be bent to position the plate at various angles.
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Can This Probe Detect Misfires and Timing Issues?
Misfires, yes: Hantek shows an engine misfire waveform captured with the HT25COP. A misfiring cylinder shows a reduced or missing firing line compared with the others. Hantek does not claim ignition timing measurement for this probe.
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What's the Difference Between This and Primary Ignition Testing?
Secondary testing shows actual spark formation and combustion chamber conditions. Primary testing only shows coil switching. Secondary waveforms reveal spark plug condition, mixture strength and combustion quality, which primary testing can't detect.
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