ONOSOKKIGasoline engine tachometerSE-2500ASE-2500A is specially designed for measuring the speed of gasoline engines. The sensor part is integrated with the measuring part and the display part, and with the built-in battery, it constitutes a portable non-contact engine tachometer. When measuring, just put the tip of the tachometer (sensing part) close to the engine's ignition coil to measure the engine speed (accuracy not less than 1 r/min or 0.01 r/s). The measured data can be saved (up to 20 data can be stored), which is convenient for users to conduct measurement confirmation and analysis afterwards. Analog output (can also be selected as monitoring output signal) and pulse output are standard configurations. The analog output signal can be used to connect a recorder to record measurement data (monitoring output can be used to confirm the sensor output waveform and working conditions), and the pulse signal can be used to connect an FFT analyzer for tracking analysis. Measurement object Gasoline engine Calculation method Cycle calculation method Measurement interval Within 1 second + 1 cycle Measurement unit r/min, r/s 2-stroke 4-stroke Measurement range - 1-cylinder engine 120 to 20,000 r/min 1-cylinder engine 2-cylinder engine 120 to 20,000 r/min - 3-cylinder engine 120 to 20,000 r/min 2-cylinder engine 4-cylinder engine 120 to 20,000 r/min - 5-cylinder engine 120 to 20,000 r/min 3-cylinder engine 6-cylinder engine 120 to 15,000 r/min 4-cylinder engine 8-cylinder engine 120 to 12,000 r/min - 10-cylinder engine 120 to 10,000 r/min - 12-cylinder engine 120 to 8,000 r/min Measurement accuracy Display value * × (±0.02 %) ± 1 digit (*Displayed value is a count value without a decimal point.) Measuring method Electromagnetic induction method Measuring distance 10 ~ 200 mm Measuring part Ignition coil Cylinder and stroke number selection Built-in signal selector Display part 7-segment 5-digit LCD display with background lighting (digit height 10.2 mm) Overflow function When the measured value exceeds the measuring range, an overflow (ERROR mark) is displayed Speed upper limit warning function When the speed measurement value exceeds the preset upper limit, an upper limit warning (↑ mark) is displayed