Initially, the Cold Controls are manufactured under the know-how of Ranco - U.K., and by the long time experience and developments since lincense expire in 1997. Kulthurn Controls is still manufacturing the temperature controls with either fixed or variable temperature setting, and the products are internationally known and accepted for use in air-conditioner, refrigerator, freezer and water cooler. This control device switches on and off the compressor dependent on the sensed temperature in the area desired. We can also offer a design followed by production of thermostats to meet the specific needs of individual customer.