Hunan Firstrate Sensor Co., Ltd. is a high-tech joint venture specialized in researching, manufacturing, and selling sensors. Our products include pressure transmitters, temperature transmitters, liquid-level transmitters, wind speed & direction transmitters and intelligent control instruments. They are widely used in the field of aviation & aerospace, national defense & military project, engineering machinery, railway & urban railway system, automotive electronics system, HVAC, air compressor, textile, petrochemical, coal mines and other industrial automation control.