Oil‑Filled Shock Resistant Pressure Gauge 0‑25 MPa Key Product Advantages Bubble‑free damping oil after violent shakingEvery finished pressure gauge goes through the shaking inspection test. No trapped air bubbles will stay inside the gauge shell. The inner oil stays smooth for stable pointer movement. High‑purity transparent filling oil, anti‑yellow for long‑term useWe adopt premium‑grade purified damping oil. The liquid keeps crystal‑clear and will not turn yellow after