“Floating Ground Accidents” Are Exploding in 2025 – Why 99% of Bench Oscilloscopes (Including DOS1104) Are NOT Channel-Isolated & How to Measure Safely
The HANMATEK DOS1104 is the best-value 110 MHz 4-channel bench oscilloscope of 2025 at only €289 — but like 99% of bench scopes, its channels are NOT isolated (all grounds are tied together). This article explains exactly when that’s dangerous, the 5 most common “blown scope” accidents, and the safest, cheapest way to do floating/offline measurements in 2025: pair the DOS1104 with a €69 differential probe. Real tests, comparison tables, and Black Friday bundle (free SF3 stud finder) included.
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