The Testec TT-HX 212 and TT-HX 312 passive oscilloscope probes deliver professional-grade performance for electronic design engineers requiring accurate high-frequency signal measurements. Designed for use with oscilloscopes featuring 1 MΩ BNC inputs, these probes offer a bandwidth of 350 MHz in x10 attenuation mode, ensuring minimal signal distortion in fast-edge applications. The TT-HX 312 adds switchable x1/x10 attenuation for flexible low-voltage measurements.
Key specifications include a maximum input voltage of 400 Vrms (CAT II) in x10 mode, with robust protection against transient overvoltages up to 1500 V. This makes the probes ideal for testing circuits directly connected to mains outlets or industrial equipment. The Pollution Degree 2 rating ensures reliable operation in environments with non-conductive pollutants and occasional condensation, while a wide compensation range (8–25 pF) guarantees compatibility with most oscilloscope input capacitances.
Unique features include a voltage derating curve to guide safe operation across frequencies and dual high/low-frequency compensation trimmers for optimised waveform fidelity. The ergonomic 5 mm tip and spring-loaded accessories enable secure connections to miniature test points, reducing measurement errors caused by poor contact.
For engineers prioritising safety without compromising bandwidth, the TT-HX series outperforms budget alternatives with certified CAT II compliance and industrial-grade durability. Its combination of high transient protection and precision makes it indispensable for power electronics, embedded systems, and automotive diagnostics.