flow indicator 1. for the pipe line of freezer or air conditioner system 2.show moisture of refrigerant .
NSE series sight glasses is for the pipe line of freezer or air conditioner system in order to show moisture of refrigerant and flow status of refrigerant and lubricating oil. It indicates the oil level of compressor crooked-shaft box,so that we can look and control the system.
Before you install the NSE sight glasses,maybe the color of moisture indicator is pink,because it absorbs moisture in air.When it is set up in air conditioner system,if moisture of refrigerant is acceptable,color changing area of the indicator will change to blue color after around 10 hours.If after 10 hours,color changing area still can't change to blue color,you have to look for what are the causes or change filter dryer in system.
welding sight glass flow indicator moisture indicator