PH
preferred label: پ.هاش @fa
type: Concept
related: PH meter

PH sensor
preferred label: حسگر پ.هاش @fa
type: Concept
related: PH meter

PH meter
related: PH sensor
related: PH
broader: instrument
preferred label: پ.هاش‌سنج @fa
type: Concept

instrument
preferred label: سنج‌افزار @fa
type: Concept
narrower: PH meter