Johnson Controllers Mechanical Temperature Controller A19AAF-12C Remote Bulb, SPDT, Heat & CoolThe A19 Series mechanical controls are single-stage temperature controls that incorporate environmentally friendly liquid-filled sensing elements.Features: Wide temperature ranges availableConstant differential throughout the entire rangeCompact enclosureFixed or adjustable differential availableVariety of sensing element stylesUnaffected by cross-ambient conditions Product Specifications BRANDJohnson Controls CAPILLARY LENGTH FEET10 BULB SIZE INCHES3/8 x 3 MAXIMUM BULB TEMPERATURE °F (°C)275 (135) DIFFERENTIAL TEMPERATURE °F3.5 TEMPERATURE CONTROL RANGE °F25 to 225 VOLTAGE240 / 120 NEMA RATING1 STAGESSingle SWITCH ACTIONSPDT TYPEHeat & Cool LISTING, RATING, CERTIFICATIONUL Listed LIMITED WARRANTY YEARS1 MANUFACTURER'S PART NUMBERA19AAF-12C