Profile: Hongyi Precision Industrial Inc. specializes in manufacturing microcomputer temperature controllers, pressure controllers, flow controllers, oxygen controllers, electronic cabinets, digital thermometers and software. PD201 digital pressure gauge adopts stainless steel case and has lower consumption. It is widely used to measure and monitor the pressure in the industrial scene. The main application fields are chemical engineering, mining and petroleum. RT 101 data logger can record two temperatures simultaneously, and print out the recorded temperatures through setup of the parameter. It is widely applied in temperature monitoring and recording food transportation & storage. It has 24-hour digital display, printable readout, audible & visible alarm system, battery back-up and registration of refrigeration unit.