Usage description: General pressure gauges are suitable for measuring the pressure of liquids, vapors, and gases that are non explosive, non crystalline, non solidifying, and non corrosive to copper and copper alloys.Pressure gauges are also known as general pressure gauges and spring tube pressure gauges, while precision pressure gauges are also known as standard pressure gauges. The pressure vacuum gauge includes negative and positive pressure range indications. When ordering the axial pressure gauge with a diameter of 60, please specify the joint thread M10 × 1 or M14 × 1.5. Special axial pressure gauges can be customized according to user requirements. Environmental conditions for use: -40~70 ℃, relative humidity not exceeding 85%.    Temperature effect: When the operating temperature deviates by 20 ± 5 ℃, it should not exceed 0.4%/10 ℃....