ZHIHUI SHANDONG(WISTOM) INSTRUMENT CO., LTD has been a leader in quality and design of Direct Drive Pressure Gauges 。WISTOM is a globally recognized ISO 9001-2015 manufacturer of temperature and pressure instrumentation. WISTOM sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. We provide bimetal thermometers, pressure gauges, diaphragm-seal pressure gauges, RTDs, thermocouples, pressure transmitters, compost thermometers, and related accessories to a variety of process markets worldwide.