**Diesel Flow Meter can have output types :** **Pulse, 4-20mA analog output, RS485 (Modbus-RTU protocol), HART.**

In electronic technology, a pulse signal is continuously emitted according to a certain voltage amplitude and a certain time interval.

The time interval between pulse signals is called the period. And the number of pulses generated in a unit time (such as 1 second) is called the frequency.

Frequency is a measurement name describing the number of pulses that a cyclic signal (including a pulse signal) appears in a unit time. The standard measurement unit for frequency is Hz (hertz). The system clock in a computer is a typical pulse signal generator with a fairly accurate and stable frequency.

Frequency is represented by “f” in mathematical expressions, and its corresponding units are: Hz (hertz), kHz (kilohertz), MHz (megahertz), GHz (gigahertz). Its 1GHz = 1000MHz, 1MHz = 1000kHz, 1kHz = 1000Hz.

The time unit for calculating the pulse signal period and the corresponding conversion relationship are:

s (seconds), ms (milliseconds), μs (microseconds), ns (nanoseconds). Where: 1s = 1000ms, 1ms = 1000μs, 1μs = 1000ns.