Sotera Chemical Transfer Systems is a division of the Tuthill Corporation. Sotera's specialty in chemical transferring equipment has served customers in the fields of agriculture, construction, public works, general industrial, fuel and chemicals. Sotera's chemical transferring innovations have led them into the Diesel Exhaust Fluid (DEF) industry and has made them one of the most sought out manufacturers due to unmatchable design and reliability. Sotera offers air operated diaphragm pumps, AC/DC electric diaphragm pumps, and flow meters for DEF and other chemicals used especially in the farming industry. Other applications include industrial fluid transferring and oil based fluid transfer.