We, at AS Controls, create products that enhance your product, save maintenance and repair costs, improve product life, and create a much better end customer experience. A majority of our products are aimed at the refrigeration and air conditioning industry. Our two product lines covers two major categories: Sub zero: Digital controls for temperature, humidity, and pressure. Castle: Level controllers, Shut off Valves for ammonia, solenoid valves, strainers, ball valves (LCB,S/S, Brass) and other accessories for the refrigeration industry. All products are manufactured in-house, as a quality control measure.