digital voltmeter
type: Concept
broader: digital instrument
preferred label: ولت‌سنج رقمی @fa

digital device
type: Concept
preferred label: افزاره رقمی @fa
related: digital instrument

digital instrument
type: Concept
broader: instrument
narrower: digital voltmeter
preferred label: سنج‌افزار رقمی @fa
related: digital device

instrument
type: Concept
narrower: digital instrument
preferred label: سنج‌افزار @fa