S. C. Dey & Co. Supplies Thermal Shrinkage & Force Tester. S. C. Dey & Co. Is an ISO 9001 certified company. The Thermal Shrinkage & Force Tester is made following ASTM standards. It works on 220/240 volts, AC, 50 Hz, 1 Ph mains. This Thermal Shrinkage & Force Tester is incorporated with PID Temperature Controller.