OBDResource ST100 Pro Spark Plug Tester – Professional Dual-Plug Ignition Diagnostic Tool with Wide Voltage Input

The OBDResource ST100 Pro Spark Plug Tester is a professional ignition system diagnostic tool designed to quickly and accurately test the firing performance of spark plugs under simulated operating conditions. Ideal for automotive technicians, engine rebuilders, maintenance shops, and advanced DIY enthusiasts, this spark tester helps identify weak spark, no spark, misfire and faulty ignition components without running the engine.

Supporting wide voltage input (100–240V), the ST100 Pro is compatible with workshop power supplies worldwide. The tester is capable of dual plug simultaneous testing, allowing two spark plugs to be checked at the same time for efficient diagnosis and direct comparison. High-energy spark output replicates real ignition conditions, while built-in indicator lights provide clear visual feedback for fast and intuitive testing.

Compact, durable, and easy to use, the ST100 Pro delivers reliable spark plug performance analysis — helping technicians make confident decisions before reinstalling or replacing spark plugs.

Key Features

Wide Voltage Input (100–240V)
Compatible with global workshop power systems, making it ideal for professional garages, service centers, and field use.

Dual Spark Plug Testing
Test two spark plugs at once for side-by-side comparison and faster diagnostics.

High-Energy Spark Output
Simulates real engine ignition spark energy for accurate assessment of plug performance.

Visual Indicator Lights
Integrated power and spark activity lights provide intuitive, real-time visual feedback.

Easy & Safe Operation
Quick plug insertion and one-switch activation make this tester simple for both professionals and DIY mechanics to use.

Durable Professional Construction
Rugged housing and reliable internal electronics are built for frequent workshop use.

Typical Applications

• Diagnose weak spark or no spark conditions
• Compare spark plug performance before installation
• Verify spark plug condition after cleaning or maintenance
• Support ignition system troubleshooting
• Workshop and field diagnostic use

Technical Specifications

Product Name: OBDResource ST100 Pro Spark Plug Tester
Voltage Input: 100–240V AC
Testing Capacity: Dual spark plug simultaneous test
Output: High-energy spark simulation
Indicators: Power and spark status lights
Application: Automotive gasoline engine spark plug testing