The English XL slip test device
The English XL has not been evaluated by the English UK HSE who have tested SlipAlert.
English XL is American
The English XL is designed and built and sold in America by William English. We will be happy to compare English XL test results with SlipAlert test results. SlipAlert test results convert to PTV and coefficient of friction.
We understand that the English XL is a good slip test machine but not as easy to use or as reliable as SlipAlert

Contact SlipAlert for more information.
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