Johnson Controllers Temperature Controller A28AA-28C Two Stage w/ Adjustable Interstage Differentl.

Johnson controllers mechanical temperature controller a28aa-28c two stagew/ adjustable interstage differentl. the a28 series are two stage mechanical temperature controls that incorporate a liquid filled sensing element.features: wide temperature ranges availableconstant differential throughout the entire rangespdt snap-acting switchesunaffected by changes in barometric pressureunaffected by cross ambient conditions compact enclosure variety of sensing element styles