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\n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n \u003cul class=\"a\"\u003e\n \u003cli\u003eMeasure different engine speed. Measuring range: 10-9999 rpm\u003c\/li\u003e\n \u003cli\u003eComes with hall sensor and magnet, good stability, high precision and strong anti-interference ability\u003c\/li\u003e\n \u003cli\u003eInput pulse signal: NPN \/ PNP, open collector, contact switch, contactless switch, level pulse input signal voltage: low level: -30V -0.6V, high level: 4-30V\u003c\/li\u003e\n \u003cli\u003eThe outer appearance takes standard size, convenient to install and easy to use\u003c\/li\u003e\n \u003cli\u003eMeasuring range: Frequency: 9999Hz, 999.9HZ, 99.99KHZ, automatic switch selection\u003c\/li\u003e\n \u003c\/ul\u003e"}