The 10H series temperature control was developed to sense hot spots along the length of electric baseboard heaters. The snap–action design provides high–speed contact separation resulting in excellent life cycle characteristics at electrical loads up to 25 amps at 277VAC. The 10H capillary tube is vacuum charged with selected fluids to give specific calibrations. When the calibration temperature is reached, a change in fluid vapor pressure allows the diaphragm to snap through and operate the contacts. Typical applications include electric baseboard heaters and other applications where it is necessary to sense temperatures along a continuous length.