TOPDON CT100 Automotive Circuit Tester, 5-30V Professional Load Testing, Measurement Range: 3.3V-65V, Accuracy up to ±0.1V, 12.5 ft Extends
$49.99
$52.99
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1. The TOPDON CT100 is designed for:
- Professional auto repair technicians doing daily wiring, fuse and starting system troubleshooting
- Light truck, RV and motorcycle maintenance personnel for DC circuit voltage & load testing
- DIY vehicle enthusiasts for self-inspection of batteries, wiring harness and electrical accessories
- Automotive vocational schools for circuit principle, polarity and voltage measurement teaching
- Fleet maintenance staff for batch vehicle electrical system routine inspection
- Mobile roadside repair specialists with demand for long-distance probe operation
2. Supported Key Functions & Features
Professional Load Testing
TOPDON CT100 supports DC 5-30V load testing with up to 1.2A output.
It can monitor voltage changes during load testing to help identify:
• Weak batteries
• Poor electrical connections
• Circuit voltage drops
• Internal electrical faults
Accurate Voltage Measurement
CT100 supports a wide measurement range:
Voltage Measurement Range:
3.3V-65V DC
Accuracy:
• ±0.1V accuracy from 3.3V to 60V
• ±0.2V accuracy from 60V to 65V
It provides accurate voltage readings for vehicle batteries, circuits, and electrical components.
Automatic Polarity Detection
The CT100 automatically identifies positive and negative polarity.
Indicator:
• Red backlight: Positive connection
• Green backlight: Reverse polarity connection
The polarity display helps prevent incorrect connections and protects vehicle electronic components.
Digital Voltage Display
The high-contrast digital screen provides:
• Real-time voltage reading
• Polarity information
• Test status display
The 0.1V resolution allows technicians to quickly understand circuit conditions.
Audible Warning Alerts
The built-in buzzer provides sound notifications for:
• Device startup
• Reverse connection warning
• Load testing operation
• Overvoltage protection
• Overheating warning
Extended Cable & Portable Design
Features:
• 12.5-foot extended test lead for easier access
• Compact and lightweight design
• Universal 4mm banana plug compatibility
• Supports additional probes and accessories
3. What Vehicles Does It Support?
TOPDON CT100 supports various 12V automotive electrical systems, including:
Vehicle Types:
• Sedans
• SUVs
• Trucks
• Motorcycles
• RVs
Supported Electrical Systems:
• Vehicle battery systems
• Automotive wiring circuits
• Lighting circuits
• Electrical components
• General DC voltage systems
Compatible Vehicle Brands:
The CT100 is a universal electrical testing tool and is not limited to specific vehicle brands.
It can be used on vehicles from major manufacturers, including:
• BMW
• Mercedes-Benz
• Volkswagen
• Audi
• Toyota
• Honda
• Ford
• Chevrolet
• Nissan
• Hyundai
• Kia
• Lexus
• Jeep
• Other 12V vehicle systems
Vehicle compatibility depends on the electrical system voltage and testing requirements.
4. Please Note the Following Limitations
- Only for low-voltage DC circuits; cannot test new energy vehicle high-voltage power systems (>65V)
- Load test function only available within 5–30V range; circuits above 30V cannot perform load detection
- Cannot read, clear vehicle ECU fault codes or complete ECU coding/programming; only pure electrical measurement tool
- Not applicable for industrial high-voltage AC circuits, large construction machinery high-current equipment
- Continuous long-time load test will trigger overheating protection; need intermittent cooling
- No built-in storage function; cannot record and save historical voltage test data
- Not equipped with waveform measurement function, cannot be used as oscilloscope probe
5. Hardware Accessories & Licensing Requirements
- Pure hardware measuring tool, no activation code, subscription or paid authorization required, plug-and-play
- Standard package only contains CT100 main tester; probes and alligator clips need separate purchase if required
- No matched PC, mobile APP or diagnostic scanner required; independent single-hand operation
- No extra paid software or hardware license needed for all built-in measurement and load functions
6. Software Version & Supported Operating Systems
- Standalone analog hardware without embedded firmware, chip program or operating system
- All test functions are realized through physical circuit and digital display chip, no computer connection required during use
- No supporting PC/Mac software, no data export or offline analysis function
7. Software Update
- No upgradable firmware inside the machine, no online/offline update function at all
- Circuit parameters and alarm logic are fixed at factory, zero update cost and no free update expiration period
8. Global Version
100% global universal hardware without regional circuit or voltage lock. The 3.3–65V wide measurement range adapts to 12V/24V vehicles worldwide, usable in all countries without function shielding.
9. Warranty
- Standard manufacturer hardware warranty: 12 months from original purchase invoice date
- Warranty coverage: Factory circuit defects, display screen and internal wiring faults under normal DC low-voltage test
- Excluded from free warranty: Reverse voltage burnout, overheating damage from long load test, liquid water ingress, artificial disassembly, broken test cable
- 30-day global return policy (buyer bears return freight for non-quality problems); lifetime text & email technical support
10. Package List
1pc x TOPDON CT100 Main Unit
Why Choose TOPDON CT100?
Professional Load Test with Precise Results
Intelligent Audio-Visual Indicator System
Versatile Compatibility & Extended Reach
Reviews coming soon.