The TR-tester, is used for the determination of low temperature characteristics by the temperature retraction procedure according to ISO 2921.The computer controls the temperature rise and measures the length change of the samples. The result is displayed as TR10, TR30, TR50 and TR70. The TR-tester is computerized and performs the test automatically after the cooling media has been cooled and the sample has been mounted. An automatic release of the samples, after the pre cooling period, is included.