KnowraUniversal indicatorLinked fromLinked fromThe 6 pages that link to Universal indicator, each with the reason it gives.All 6Broader topic 3Compared with 3pHBroader topic: It offers an approximate color scale, unlike precise electrode-based pH measurement.Acid–base indicatorBroader topic: It estimates pH over a wider range than a single indicator.pH indicatorBroader topic: Its broad color scale estimates pH when a narrow-range indicator would be unsuitable.