Johnson Controllers Mechanical Temperature Controller A19AAD-5C Remote Bulb, SPST - Open LowThe 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 2-5/8 MAXIMUM BULB TEMPERATURE °F (°C)190 (88) DIFFERENTIAL TEMPERATURE °F2.5 TEMPERATURE CONTROL RANGE °F30 to 50 VOLTAGE240 / 120 NEMA RATING1 STAGESSingle SWITCH ACTIONSPST - Open Low TYPEFixed Differential (Closed) LISTING, RATING, CERTIFICATIONUL Listed LIMITED WARRANTY YEARS1 MANUFACTURER'S PART NUMBERA19AAD-5C