In Radiation Protection Instrumentation practice, an instrument which reads a rate of detected events is normally known as a ratemeter, whereas an instrument which totalises the events detected over a time period is known as a scaler.
Whereas an instrument detected over a time period is known as a scaler. This was what an instrument which reads a rate of detected events is normally known as a ratemeter in Radiation Protection Instrumentation practice. This instrument totalises the events.