Agr International


Agr International, Inc.
Formerly called
Preston Laboratories
Founded 1927
Founder Dr. Frank W. Preston

Company Profile

Agr International, Inc. is provides a line of products and services for quality control in the beverage and packaging industries in the United States and internationally. Its products for the packaging industry include on-line inspection equipment, laboratory testing equipment, ware handling products, and filling products.

The company’s products also comprise quality testing systems for PET bottles and preforms; and products for aluminum filler applications. It also offers container design services, consulting, in-house testing and evaluation, industry and equipment training, and product support. Agr International, Inc. is headquartered in Butler, Pennsylvania.

Products / Technology

AGR products for measuring and testing plastic containers and preforms manufactured from PET

by type:

  • Laboratory: High-precision, semi-automated and automated testing and measurement instruments designed for quality management of bottles, preforms and similar products
  • Online: Measurement, inspection and process management products that can be integrated into production lines for managing bottle and preform quality during the production process
  • Manual gauges: Low cost gauges that can be used in the laboratory or along the production line for basic measurement of bottle and preform attributes

by application:

  • Thickness
  • Pressure
  • Dimensional
  • Attribute Testing
  • Strain Measurement
  • Surface Treatment
  • Container Handling
  • Volume
  • Sampling
  • Process Control
  • Vision Systems
  • Shelf-Life


Agr International, Inc. was founded in 1936. The company was formerly known as American Glass Research.


PETplanet Insider Articles

Issue 06 / 2021: Maximised laboratory throughput
Issue 03 / 2021: A journey into the unknown
Issue 09 / 2020: Agr introduces the Gawis 4D high precision laboratory thickness & dimensional measurement system for plastic containers and preforms
Issue 07 / 2020: Meeting online rPET inspection challenges when producing PET bottles
Issue 07 / 2020: Digital control systems for PET bottle production
Issue 05 / 2020: Laboratory thickness and dimensional measurement system for plastic containers
Issue 12 / 2019: PET preform and container measurement
Issue 09 / 2019: High-precision laboratory thickness and dimensional measurement system
Issue 07 / 2019: Exceeding expectations
Issue 03 / 2019: Advanced thin-wall measurement for PET bottles
Issue 11 / 2017: Mould Control
Issue 09 / 2017: 'Wasp-waist‘ bottle
Issue 07 / 2017: Blowmoulder automation tools
Issue 03 / 2017: The automated laboratory
Issue 10 / 2016: Control is better
Issue 09 / 2016: Agr Int. to display the CrystalView system for managing PET bottle crystalinity
Issue 07 / 2016: Agr international opens center in Italy
Issue 03 / 2016: Inspection: Bottle control
Issue 09 / 2015: Test equipment for PET – inspired by glass bottle manufacturing
Issue 03 / 2015: Light weighting and quality control

External links

Agr International Website