Glass bottles may have stress during manufacturing and processing for some reasons, which may lead to the bursting of glass bottles in high temperature sterilization, filling and other finished product processing.

The phenomenon of stress during glass production has significant consequences on the quality of the glass. This has the effect of causing fragility in the samples. It is therefore essential to control this risk.

CanNeed-PLT-300 Polarization Tester is used to measure the stress of glass bottles.which is developed to highlight various stress defects on glass bottles. It can meet the qualitative testing or quantitative testing, by using the birefringence phenomenon produced by light irradiation to glass bottles to calculate the optical range difference, so as to directly calculate the stress value and stress level.

1) Directly display stress value data and stress level, easy to operate, accurate measurement;
2)Adopting absolute angle encoder to replace the original common angle encoder;
3)Equipped with a micro-printer, can directly print the test values, convenient and efficient;
4) Good compatibility, can test a wide range of glass bottle height, good applicability;
5)Good appearance, using 304 stainless steel and aluminum alloy materials, strong and durable.

• Resolution: ±0.1º
• Bottle Type： Glass bottle
• Bottle diameter： ≤150mm(other height by ordering)
• Bottle height： ≤380mm(other height by ordering)
• Accuracy： ±1º
• Polarization field diameter: ≤200mm
• Difference in optical range: 565nm
• Polarization: ≥99％
• Stress level: 1-5 level
• Stress value: 0-228
• Power Supply: AC220V， 50Hz