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๐ Unlock precision diagnostics with OTC 3631 โ the proโs logic probe for every pulse and signal!
The OTC 3631 Heavy-Duty Logic Probe Tester is a professional-grade handheld tool designed for automotive and electronic diagnostics. It supports a wide voltage range (3-26V) and features bright dual LEDs for clear signal interpretation. Compatible with a variety of sensors including fuel injectors and Hall effect sensors, it offers airbag-safe testing with a rugged stainless steel probe and a 12-foot heavy-duty coil cord. Trusted by mechanics and electronics pros alike, it combines durability, precision, and ergonomic design in one cost-effective package.

















| ASIN | B001GZH1C8 |
| Best Sellers Rank | #324,671 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #441 in Circuit Testers |
| Brand Name | OTC |
| Color | Red |
| Compatible Devices | Vehicles, Automotive Electrical Systems |
| Customer Reviews | 4.6 4.6 out of 5 stars (477) |
| Global Trade Identification Number | 00731413505744 |
| Included Components | Product & Instructions Guide |
| Item Dimensions | 2.2 x 13.6 x 2 inches |
| Item Weight | 1 Grams |
| Manufacturer | OTC |
| Measurement Type | Voltmeter |
| Minimum Operating Voltage | 3 Volts |
| Model | 3631 |
| Part Number | 3631 |
| Power Source | Battery Powered |
| Style Name | Handheld |
| UPC | 731413505744 |
| Unit Count | 1.0 Count |
| Warranty Description | One (1) year limited warranty |
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