pressure sensor stuff

  • i totally forgot that at this size (~10cm diameter of tank) capillary action is actually very strong; LN2 creep upwards into the penetration for sensing
  • since the pressure sensor isn't relevant for the relief valve, we should really reconsider the non-invasive options just because of this 
    • foil strain gauges prob best solution?
      • sent in 2 inquiries to Martinez Measurements and Micro Measurements
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