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Subject: Honeywell DC001NDR5 sensor
From: Barry Lotz barry_lotz@.............
Date: Thu, 13 Apr 2006 20:33:44 -0700 (PDT)


Hi All
   Not to get of the current thread but I was thinking of the honeywell pressure transducer. If one has a horizontally oriented cylinder(say 6" long - maybe 2" diameter) filled with a non-evaporative liquid of low viscosity. At each would be a manometer tube attached to the end plates and directed up and partially filled with the liquid. Attach the DC001ndrr5 to one end and maybe leave the manometer tube at the other end open (maybe closed I'm not sure). It would seem that the sensor would measure the pressure difference as the liquid moved horizontally due to seismic motion. I did the math for a column of water 6" long and got g numbers pretty low say 10^-5 for a sensor of  125 pa. I don't think there would be fluid flow issues at the manometer ports since the fluid velocities would seem to me low. One would probably have to put the sensor in a sealed container to minimize barometric fluxuations. I think scientific american had something like this years ago but measured
 the water levels some other way.
  Regards
  Barry
Hi All
 Not to get of the current thread but I was thinking of the honeywell pressure transducer. If one has a horizontally oriented cylinder(say 6" long - maybe 2" diameter) filled with a non-evaporative liquid of low viscosity. At each would be a manometer tube attached to the end plates and directed up and partially filled with the liquid. Attach the DC001ndrr5 to one end and maybe leave the manometer tube at the other end open (maybe closed I'm not sure). It would seem that the sensor would measure the pressure difference as the liquid moved horizontally due to seismic motion. I did the math for a column of water 6" long and got g numbers pretty low say 10^-5 for a sensor of 125 pa. I don't think there would be fluid flow issues at the manometer ports since the fluid velocities would seem to me low. One would probably have to put the sensor in a sealed container to minimize barometric fluxuations. I think scientific american had something

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