Pressure under 50m of water?
I'm playing with MEMS pressure sensors which detect air pressure. If I put the mems sensor in a water proof container and put it 50meters under water what 'pressure' will the sensor see (preferably in millibars)? Does it depend on the container? I mean, if the container is plastic won't the sensor have air pressure exerted on it? If the container is steel would the pressure be less? If the container is filled with water then I suppose the pressure would equal the mass of 50m of water.. Thanks.