Sight glasses with moisture indicator

OverviewConstruction – Installation – Catalogue

The indicators described in this section are designed for installation on commercial refrigerating systems and on civil and industrial conditioning plants, which use refrigerant fluids proper to the Group II, according to Article 9 of PED Directive 97/23/CE 2.2 (non-dangerous fluids)

IGLOO glass indicators are suitable for all the most common CFC, HCFC and HFC refrigerants such as R22, R134a, R404A, R407C, R410A and R507 and Carbon Dioxide CO2 R744 (sub-critical). Not suitable for ammonia R717

Level Indicator Refrigerant fluid moisture level, in ppm
R22 R134a R404A R407C R410A R507
SAFE GREEN <60 <75 <30 <30 <30 <30
WARNING CHARTREUSE 60 75 30 30 30 30
DANGER YELLOW >60 >75 >30 >30 >30 >30


Brazing advices

We recommend to avoid to overheat the sight glass to limitate the risk to demage the internal moisture sensor. ODF solder swaged connection on the indicators are clean when shipped. It is not necessary polishing or cleaning the inside of the fittings before brazing. IGLOO indicators do not require any disassembly for brazing, the extra-long swaged connection reduce sensibly the possibility of damaging of the internal parts when they are brazed into the system. To prevent damaging on the indicators it is recommended to use a proper brazing technique