PP diaphragm pressure gauge is specially used in printed circuit board PCB/LCD liquid filtration pump and petrochemical industry. In the PCB circuit board industry, it is used in metal etching machines and PCB/LCD cleaning liquid filtration pumps. It is corrosion-resistant and can measure high-viscosity liquids and gases. It is widely used in various chemical machinery in the chemical industry. Such as developing machine. Cleaning machine, etching machine, liquid medicine filter and other equipment. Due to the one-piece structure, the pressure gauge is not prone to cracks and oil leakage, and has excellent corrosion resistance. 1. Mirror material: tempered glass or PC. 2. Shell: 304 stainless steel shell or HCPP, fluorine rubber has high chemical resistance, and PP has good stability. The deformation temperature is 130°C. 3. Filling fluid: Glycerin (99.5%). 4. Internal machine material: copper alloy. 5. Joint size and material: PP, upright or embedded in standard internal teeth 1/2"PT1/2"NPT6. Measuring device and material: brass Baden tube, fluorine rubber or Teflon diaphragm, VITON<25kg/ cm2(bar) Type C tube. 7. Panel material: aluminum, black font on white background. 8. Pointer material: aluminum, black. 9. Upper cover material: fluororubber or PP impact-resistant shell 10. Diaphragm material: fluororubber or Teflon