multimètre

A wattmeter measures electrical power, which is one of the functions that a multimeter can perform. Thus, it is a direct competitor for measuring power.

A spectrum analyzer measures the magnitude of an input signal versus frequency. While some high-end multimeters may have basic frequency measurement capabilities, a spectrum analyzer provides much more detailed frequency analysis, which could be considered a competing tool for certain frequency-related measurements.

An oscilloscope displays voltage signals over time, allowing for detailed waveform analysis. While some multimeters offer basic voltage measurement, oscilloscopes provide significantly more detailed and dynamic signal analysis, making them a competitor for voltage and signal analysis.