noun
surveying instrument; surveyor's level
General term for instruments used in land surveying, such as levels, theodolites, and total stations.
測量機械を使って土地の高低差を測る。
We measure the elevation difference of the land using surveying instruments.
測量器 is a broader term for any surveying device, while 測量機械 often implies more complex mechanical or optical instruments.
Compound of 測量 (surveying) and 機械 (machine, instrument).