The Testo 270 frying oil tester quickly, easily, and reliably determines the quality of frying oil. It measures the amount of "Total Polar Materials" (TPM) in the oil and reports this as a percentage. If the oil is too old, it will have an increased TPM value, resulting in poor-quality fried food. Additionally, harmful substances may be present in the oil. Regular measurement with the Testo 270 prevents this. The use of the device also ensures that frying oil is not changed too early, reducing frying oil consumption by up to 20%.