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ROCKAWAY, NEW JERSEY – May 7, 2026 – TOPDON USA (https://www.topdon.us), a leading provider of cutting-edge diagnostic tools, technology and software solutions for DIY and automotive repair professionals, has released the CT100 Circuit Tester, a versatile electrical testing tool for diagnosing circuits across cars, trucks, and motorcycles. Featuring a clear digital voltage display with built-in load testing, the CT100 Circuit Tester is available through TOPDON’s national distribution network.
“The CT100 Circuit Tester is a simple-to-use, versatile diagnostic tool built for everyone from weekend DIYers to professional technicians,” said Chad Schnitz, Vice President of TOPDON USA. “What sets the CT100 Circuit Tester apart is its load testing capability. Our team engineered it to measure DC volts from 3.3V to 65V, allowing it to quickly identify weak connections, voltage drops, and wiring faults. With the CT100, you can go from ‘I don’t know’ to ‘I can fix it’ in no time.”
The TOPDON CT100 features a real-time digital display that offers ±0.1V accuracy from 3.3–60V and ±0.2V from 60–65V. Its dual-color backlighting clearly identifies positive and negative polarity to help prevent reverse connections. Additional audio and visual alerts provide immediate feedback for high voltage, overheating, and reverse polarity, with an additional tone to confirm circuit continuity and avoid having to constantly monitor the screen. The TOPDON CT100 has a standard 4mm banana jack that allows quick switching between clips and features a durable, heavy-duty alligator clip that offers consistent performance during repeated use.
The TOPDON CT100 Circuit Tester comes with a 12.5-foot cable for greater reach when working around vehicles and a convenient carrying bag.
About TOPDON USA
Founded in 2017 and based in Rockaway, New Jersey, TOPDON USA is a provider of entry-level, mid-level, and advanced tools and solutions for professional technicians and DIY enthusiasts. Globally, TOPDON has over 250 industry-leading engineers and owns over 600 patents and software copyrights. The company’s cutting-edge technology helps shops minimize downtime and maximize profits. For more information, visit www.topdon.us. Follow TOPDON USA on Facebook, Instagram, YouTube, and TikTok.
