Residual stress measurement for glass containers and glassware

The Agr Polarimeter, used in accordance to ASTM C148-B, provides measurement of residual stress in annealed glass containers and glassware. This device offers a simple and reliable determination of residual stresses with measurable results that are objective and accurate, while eliminating material thickness limitations and strain disks.


  • Glass bottle production – detect annealing and structural stresses
  • Glass manufacturing – evaluate resultant temper stress


  • Dual-mode operation permits use as a polarimeter or polariscope
  • Measurement of retardation up to 565nm
  • Compliant to ASTM C148-B
  • Rotatable analyzer
  • Retractable tint plate