CST454 Constant 45° Seal Strength Tester Standard (Cup 4″ max OD, 4″ max deep)


The Constant 45° Seal Strength Tester is designed for containers with peel open lids and available in four models – Standard, Bowl, Tall, and Tray. For rigid and flexible packages. Complies with ASTM test method F2824. Please contact us for purchasing information.

Not sold online

SKU: 20-04-001 Category: Tags: , , ,



  • Instrument completely peels the lid of a cup or tray (depending on model type chosen)
  • Pin-points exact location of trouble areas
  • Maintains 45° lid angle throughout the peel process
  • Records actual force as required to open the package at 45° angle
  • Stainless steel and anodized aluminum construction
  • Pneumatic gripper improves testing ease and speed
  • Stepper motor design equipped with a digital controller
  • Digital force gauge can easily be removed for calibration
  • Zero backlash ball screw with permanent lubrication
  • High level of safety – no pinch points
  • Universal vacuum holding fixture and custom top plates for any container size and shape
  • RS-232 Data output for use with VEI data collection software
  • Multiple speed drives (vary per model)
  • Required utilities are 120-240 VAC and 60 psi compressed air


  • Rigid thermoformed trays
  • Injection-molded trays
  • Single serve containers
  • Trays with flexible lids

Standard Model

  • For containers with peel open lids
  • User can test cups with up to 4” lid diameter and up to 4” height
  • Multiple speed drive 1, 6 and 12 inches per minute (calibrated)
  • Instrument weight: 47 pounds
  • Dimensions: 30″L x 10″W x 18″H

This instrument complies with ASTM test method F2824. More information regarding this test method can be found here: ASTM F2824 Standard Test Method for Mechanical Seal Strength Testing for Round Cups and Bowl Containers with Flexible Peelable Lids

PDF Icon Printable Catalog Available for CST454 Standard

Additional information

Weight 47 lbs
Dimensions 30 x 10 x 18 in