Sight Glass

ref. Sight Glass

Sanhua sight glasses provide an immediate visual of system liquid condition. Easy to follow green and yellow color indicators alert to dry or wet conditions. When a system has a refrigerant shortage or restriction, the large sight glass allows for easy detection of bubbles. Sanhua Sight Glasses are compatible with common HCFC and HFC refrigerants and are UL approved to a maximum operating pressure of 667 psig.

Air conditioning Commercial Refrigeration Heat Pump


  • Easy to read wide angle sight glass
  • High precision color indicator
  • Compatible with all common HCFC and HFC refrigerants
  • 100% factory leak tested

General specifications

  • Applicable for all common HCFC and HFC refrigerants such as: R22, R134a, R404A, R407C, R410A, R507
  • Min./max. ambient temperature: -50°C (-58°F) to +80°C (176°F)
  • TS min./max.: -40°C (-40°F) / +80°C (176°F)
  • PS: 4,6 MPa (46 bar)
  • Certifications: UL/CSA and PED declaration

General Characteristics

Sight Glass | Male to Female
Aftermarket ModelConnection TypeSAE Flare
SG-2-FM Flare F x M 1/4
SG-3-FM Flare F x M 3/8
SG-4-FM Flare F x M 1/2
Sight Glass | Female to Female
Aftermarket ModelConnection Type
Connection ODF
SG-2-S ODF x ODF 1/4
SG-3-S ODF x ODF 3/8
SG-4-S ODF x ODF 1/2
SG-5-S ODF x ODF 5/8
SG-7-S ODF x ODF 7/8
Sight Glass | Male to Male
Aftermarket ModelConnection TypeSAE Flare
SG-2 Flare M x M 1/4
SG-3 Flare M x M 3/8
SG-4 Flare M x M 1/2