IPA: /ˌmæɡnɪˈtoʊmɪtər/
KK: /ˈmæɡnɪtəˌmɛtər/
A device that measures the strength and direction of magnetic fields.
The scientist used a magnetometer to study the Earth's magnetic field.
Magnetometer → It is formed from "magnet" (from Greek "magnētis" meaning lodestone or magnet) and "-meter" (from Greek "metron" meaning measure). The word "magnetometer" refers to an instrument that measures magnetic fields.
Think of a device that 'measures' ('-meter') 'magnetic' forces ('magnet') — that's what a magnetometer does.