1KHz-200MHz Pen Frequency Counter Handheld Needle Probe Frequency Meter OLED Digital Display SMA Signal Frequency Tester/Type-C USB 5V Power Supply

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• Tools & Home Improvement
• Circuit Testers
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• Wide 1 kHz – 200 MHz Frequency Coverage Measures RF signals from audio frequencies up to 200 MHz – covering HF, VHF, and many common communication bands. Ideal for verifying oscillator outputs, transmitter frequencies, and filter responses in both lab and field settings.
• High Resolution with Selectable Gate Times Choose between 0.1 s (10 Hz resolution) for quick checks or 1 s (1 Hz resolution) for precise measurements. The flexible gate time lets you balance speed and accuracy based on your test requirements.
• Pen‑Style Probe for One‑Handed Field Testing Integrated probe tip and compact body (11 × 1.1 × 1 cm) allow direct contact with test points – no extra cables or probes needed. Perfect for on‑site troubleshooting, production line checks, and portable use.
• Smart Invalid Frequency Filter Prevents Misreads Built‑in filter (default ON) ignores unstable or spurious signals and displays “0 Hz” instead of erratic readings. This reduces confusion when probing noisy or weak signals, saving time during diagnosis.
• User Calibration for Long‑Term Accuracy Adjustable calibration with 0.01 ppm steps and a ±250‑step range lets you correct frequency errors using a known reference. Ensures the counter stays accurate over time, even after temperature changes or component aging.