Johnson Controllers Temperature Controller A70HA-1C Remote Bulb, Cool Only, Four-Wire, Two-Circuit

Johnson controllers mechanical temperature controller a70ha-1c remote bulb, cool only, four-wire, two-circuit the a70 series mechanical temperature control incorporates a vapor-charged sensing element. the a70g, a70h, and a70k have a 4-wire, 2-circuit contact block that contains two isolated sets of contacts. the contacts are designed so that when the main contact opens, the auxiliary contact closes.