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Dear client, PT Registration/subscription via your account is restored. The website maintenance is over. We look forward to your subscriptions again! Thank you for your patience and apologies for any...

Dear client, Your account is currently not accessible due to website maintenance. During this period, please send your proficiency test subscription/registration via email to nl.iis@sgs.com. Then we will subscribe for...

We’re proud to officially launch the Institute for Interlaboratory Studies (iis) on LinkedIn. At iis, we connect laboratories around the world through high-quality interlaboratory studies. As an independent organization based...

We would like to inform you about an update in the terminology of our “used” Lubricants & Oils proficiency tests (PTs). To avoid confusion during shipping and customs processing, we...

Dear client, We would like to let you know our iis office will be closed during the following upcoming 2026 public holidays: Easter Monday, April 6th King's Day Monday, April...

Christmas and New Years Holiday Please be informed that the office of the Institute for Interlaboratory Studies will be closed from December 24, 2025, through January 4, 2026. Normal operations...