Feature:1. APPLICABLE SCENARIO: Frequency meter can be used in electronic measuring instruments; Traditional manufacturing areas, metrology laboratory, wireless communication testing and other fields2. COUNTING FUNCTION: Digital countdown timer recognizes the built in analog count, backward count, and count phases3. FLEXIBLE AND OPTIONAL: Frequency meter counting speed is optional, optional relay, collector open output, closed memory power supply4. TIME DELAY OUTPUT: Frequency counter meter supports more than 10 relay types for free selection, and has the function of time delay action relay5. TECHNICAL PARAMETERS: External sensor counter for 5V, 24V DC voltage, can be set 1.5x magnification, to determine the ratio between the count and display magnification range 0.00019.9999Specification:Item Type: Intelligent Digital Frequency MeterAmbient Temperature: 22Technical Index: 1. Measurement Accuracy: 0.1%, Reading: 1 word2. Display Mode: 0.56 red LED3. Four digit reading4. Display Refresh Rate: >3 Times per second5. Working Power Supply: AC DC8-24V, 40mA6. Over Range Display: "1" or" -1" is displayed in the first place, and the last three digits are not displayedFunction: 1. Input Pulse Signal: NPN PNP collector open circuit, contact switch, non contact switch, level pulse2. Input Signal Voltage: Low Level: -30V-0.6V, High Level: 4-30V3. Measuring Range: Frequency: 9999Hz, 999.9hz, 99.99khz three levels, automatic switching selection4. Maximum Input Frequency: 10KHz, 100khz, 300khz.Package List:1 x Frequency Meter1 x Connecting Wire