In the below linked research paper published on the MDPI Energies website, researchers from Universidad de Zaragoza use a Yokogawa Test&Measurement PZ4000 Power Analyzer as an alternative to measure the converter output power of induction cooktops.
Measure characteristics of devices that generate, transform or consume electricity. Also called power meters or wattmeters, these devices measure parameters such as true power (watts), power factor, harmonics, and efficiency.