Johnson Controllers Mechanical Temperature Controller A19AAF-20C Remote Bulb, SPDTThe 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 FEET6 BULB SIZE INCHES3/8 x 4 MAXIMUM BULB TEMPERATURE °F (°C)140 (60) DIFFERENTIAL TEMPERATURE °F2.5 TEMPERATURE CONTROL RANGE °F-30 to 100 VOLTAGE240 / 120 NEMA RATING1 STAGESSingle SWITCH ACTIONSPDT TYPEFixed Differential (Close) LISTING, RATING, CERTIFICATIONUL Listed LIMITED WARRANTY YEARS1 MANUFACTURER'S PART NUMBERA19AAF-20C