Frying oil tester. This oil tester measures the quality of frying oil as a percentage of polar composites. It can evaluate the degree of thermal oxidisation. Fill the tube with oil to the lower edge of the label. Shake to create a uniform solution. Wait for around 2 minutes. Maintaining the tube in a vertical position, compare the colour obtained with the table of colours located on the back of the tester box. Comes with a pipette, an anti-burn stand and a user guide. Set of 10 test tubes.