Johnson Controllers Mechanical Temperature Controller A19AAB-7C High Range, SPST - Open High, Heat OnlyThe A19 Series mechanical controls are single stage temperature controls that incorporate liquid-filled sensing elements.Features: wide temperature ranges availableconstant differential throughout the entire rangeSPST or SPDT snap-acting switchesfixed or adjustable differential availableunaffected by barometric pressure changesunaffected by cross-ambient conditionscompact enclosurevariety of sensing element styles Product Specifications BRANDJohnson Controls CAPILLARY LENGTH FEET6 BULB SIZE INCHES3/16 x 9-1/2 MAXIMUM BULB TEMPERATURE °F (°C)350 (177) DIFFERENTIAL TEMPERATURE °F7 TEMPERATURE CONTROL RANGE °F100 to 300 VOLTAGE240 / 120 NEMA RATING1 STAGESSingle SWITCH ACTIONSPST - Open High TYPEHeat Only LISTING, RATING, CERTIFICATIONUL Listed LIMITED WARRANTY YEARS1 MANUFACTURER'S PART NUMBERA19AAB-7C