With OELCHECK 4.0 you record the data of your lubricant and operating fluid samples in three simple steps: 1. scan the QR code of your machine and select your component if necessary. 2. scan the barcode of your sample submission form. 3. complete, save and automatically send your sample data to OELCHECK. The handwritten filling out of the sample form is no longer necessary. Simply tick the box "Information about the sample was taken online" and enclose the sample accompanying form as usual with