Profile: Precise Equipment Co. Ltd. provides pressure differential & manual manifold systems. Our manifold systems are designed for industrial, medical and speciality gas industries. Pressure differntial automatic changeover system is designed to regulate flow from high pressure cylinders. Visual & audible alarms are available if power at the site is available. Automatic electronic changeover low pressure system with emergency high pressure reserve is fully auotmatic manifold with electronically controlled systems that provide an un interrupted supply of gas.