The GASP® is the industry standard polarimeter for measuring the surface stress of glass. It is the proven, internationally recognized solution for measuring surface stress in heat-strengthened and tempered glass in accordance with ASTM C1048.
Strainoptics has continued to provide innovative improvements to the function and design of the GASP ever since its initial release in 1990. The GASP PRO is the latest addition the GASP family, the result of years of experience, customer feedback, and innovative ideas from the surface stress experts.
GASP is used on Architectural Glass or Automotive Glass
- Non-destructive
- Easy to operate
- Compliant with all industry specifications, including ASTM C1048, C1279 and the new compulsory EN-12150 and EN-1863 standards and CE marking requirements for testing mechanical strength in architectural glass
- Appropriate for in-plant or field use
- Available for flat or curved surfaces (see GASP-CS below)
Strainoptics GASP® Family
Celebrating 30 Years of reliable, repeatable surface stress measurements
The Original Laser-GASP
- Released in 1990. Thirty Years of Trusted Measurements
- Economical, but still just as reliable
LCD-GASP
- Attached LCD-Screen
- The original video GASP
GASP® Grazing Angle Surface Polarimeter – Measure Surface Stress in Tempered, Heat-Strengthened, or Annealed Glass in Accordance with ASTM C1048
LCD-GASP
The LCD-GASP comes with an attached 3.5″ LCD monitor for easy viewing by multiple users. Once you attain a satisfactory image on the LCD screen, simply look up the angle on your GASP polarimeter chart and find the surface stress in your glass. While the Laser-GASP (below) is meant for use by one operator in a horizontal orientation, the LCD-GASP is:
- Easily used by Multiple people at once
- Easily used on vertical glass surfaces (see vertical attachment accessory below)
Laser GASP
If you don’t need the LCD monitor, we still offer our standard, tried-and-true Laser GASP. The Laser GASP Surface Stress Polarimeter has an eyepiece instead of an LCD screen and just as portable and reliable as the LCD-GASP.
GASP-CS
The GASP-CS is Strainoptics GASP primarily meant for use on Automotive Glass – windshields and sunroofs. While standard GASP polarimeters are for flat or slightly curved surfaces, the GASP-CS has a modified body and adjustable legs to make it easy to measure surface stress on curved glass with a radius of less than a 200mm (~8 inches).
GASP-HS
While standard GASP polarimeters have a broad measurement range of up to 25,000 psi (180 MPa) and are primarily meant for heat-strengthened or tempered glass, Strainoptics also offers the GASP-HS, a high-sensitivity GASP for measuring annealed glass. The GASP-HS comes with a 2X measuring wedge and measures up to 12,500 psi (90 MPa).
GASP-CS-HS
What do you get when you combine the GASP-CS (for curved glass) with the GASP-HS (high-sensitivity)? You get a
GASP-CS-HS, which is a high-sensitivity GASP for curved glass.
CAL-PLATE Accessory
- Glass reference standard with certified surface stress value
- Enables verification of instrument accuracy
- Ideal for operator training
- Available for standard and high-sensitivity GASP wedges
Refractive Index Matching Fluid:
- Available in 4 oz (120 cc), 16 oz (473 cc), or 1 gal (3785 cc) sizes
- RI = 1.54 for use with GASP only – (For immersion cells, specify RI = 1.52)
GASP Case
Each GASP comes in a heavy duty plastic case with protective foam packaging and the Strainoptics logo stamped right into it. They are tough to damage but if you need a replacement case or a spare, we always have them in stock.