Thermometer Central carries a full line of Parker brand products and replacement parts. Parker Hannifin is the worldâ€™s leading diversified manufacturer of motion and control technologies and systems, providing precision-engineered solutions for a wide variety of commercial, mobile, industrial and aerospace markets. The company employs approximately 58,000 people in 50 countries around the world. The list of Parker Brands is formidable. With over 40 brands, Parker is one of the largest global suppliers of controls in several industries.