Sigma Electro Systems manufactures Clock Tester with Digital and Microprocessor Based Technology. Sigma Electro Systems is an ISO 9001:2000 registered company. Sigma Electro Systems manufactures electrical, electromechanical & pneumatic systems. Clock Tester with Digital and Microprocessor Based Technology are used to check the deviation rates in wrist watches having period of balance wheel oscillations in 0.2 sec, 0.33 sec, 0.363 sec, 0.4 sec, 0.5 sec and 0.6 sec. Clock Tester with Digital and Microprocessor Based Technology is available in the weight of 5 kg and the length and height of 360mm and 210mm.