·    The ambient temperature exceeds the range of 0 to 50 °C

    ·     Relative humidity exceeds 85% or there is condensation of dew (caused by sudden changes in temperature or other factors)

    ·       direct sunlight

    ·      Corrosive and flammable gases such as hydrogen chloride, hydrogen sulfide, etc

    ·     Have an amount of iron filings and dust

    ·       Frequent or continuous vibration, the vibration frequency is 10 ~ 55Hz, the amplitude is 0.5mm (peak-peak)

    ·    Impact exceeding 10g (gravitational acceleration).