Cutaway model: sight glass with humidity indicator Cutaway model of an industrial component used in refrigeration Features - cutaway model of a sight glass with moisture indicator Learning objectives/experiments - function and design of a sight glass with moisture indicator Specification [1] cutaway model of a sight glass with moisture indicator Technical data Connection - internal thread: 5"UNF - outer thread: 8"UNF At 25°C - green/dry: <30ppm - transition colour: 30...100ppm - yellow: >100ppm At 43°C - green/dry: <50ppm - transition colour: 50...200ppm - yellow: >200ppm