I'm not sure what you mean by class 1, 2, 3, and 4 barriers. Our barriers are based on beam density - there are several factors. For example if its a focused beam, or the further away the beam is from the focal point. We have 200 W/cm2 and 300 W/cm2 barriers for 100 seconds.
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For more information on energy density, please see here: https://lasersafetyindustries.com/blo...
For our laser safety barriers buyer's guide, see here: https://lasersafetyindustries.com/blo...
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We'd love to help you directly over the phone - please feel free to reach out at 952-405-6947 or via email at info@lasersafetyindustries.com