The NL254 Instantaneous Ratemeter provides two ranges for both pulses per second (pps) and pulses per minute (ppm), with the rate displayed on a 3 digit display as 000-999 or 00.0 to 99.9 and an analogue voltage output is provided which is proportional to the instantaneous rate.
The NL506 contains a single pole change-over analogue switch. The state of which is controlled by a logic signal.
The NL703 was designed to produce an analogue signal which represents the strength of muscle activity. It is commonly used with our NL844/NL820A for isolated EMG recording.