ONECREST is the sales and marketing partner of Gram-Cal Electric Heater Industries, a leading manufacturer of industrial heating elements, RTDs and thermocouple sensors in the Philippines. Established in 2009, ONECREST provides a comprehensive product portfolio to anticipate the heating needs of our clients.ONECREST is the Philippine distributor of Linking Tech Electronic Co., Ltd, a Taiwan-based company specializing in automated control and industrial sensor products such as PID temperature controller, digital thermometer, thermo-hygrometer, moisture meter, temperature logger, temperature probes, temperature transmitter, etc.