The LR5N-B compact digital pulse meters can display rotation speed up to 10,000 RPM with 1-pulse input per revolution.
AC voltage frequency measurement function is also supported. The meters can display the values in RPM, RPS or Hz. The built-in lithium battery allows the units to operate without external power supplies.
1-pulse input per revolution Display up to 10,000 RPM Built-in internal battery (power supply not required)