L
linnix
- Jan 1, 1970
- 0
I am trying to measure the pressure
above (0 to 10 meters) and
below (0 to 5 meters) water.
With the atmospheric pressure at sea level
of 101,000 Pascal, I estimated that
the minimum pressure is 10 meters
above water at 100,974 Pascal and
the maximum pressure is 5 meters
below water at 151,470 Pascal.
I am considering the Freescale
MPX2200 (upto 200KPa) for below water and
MPX2010 (upto 10KPa) for above water
measurements. The sensors will be attached
to four wires and buried underground.
The MPX2200 is easy to attach, with
0.1" spacing pins. The MPX2010 would
require a pcb.
First of all, are my calculations correct?
Are these sensors good for this experiment?
Are there alternatives to MPX2010 without
needing a pcb? Thanks.
---------------------------------------------
Original = 101,000 Pa
Minimum = 100,974 Pa
Maximum = 151,470 Pa
Density of water is 1030 kg/mmm
Density of air is 0.26 kg/mmm
Pressure at water level = P(zero) = 101,000 Pa
Below water level:
P = P(zero) + P(water)
= 101000 + 1030 kg/mmm * 9.8 m/ss * X m
Above water level:
P = P(zero) - P(air)
= 101000 - 0.26 kg/mmm * 9.8 m/ss * X m
above (0 to 10 meters) and
below (0 to 5 meters) water.
With the atmospheric pressure at sea level
of 101,000 Pascal, I estimated that
the minimum pressure is 10 meters
above water at 100,974 Pascal and
the maximum pressure is 5 meters
below water at 151,470 Pascal.
I am considering the Freescale
MPX2200 (upto 200KPa) for below water and
MPX2010 (upto 10KPa) for above water
measurements. The sensors will be attached
to four wires and buried underground.
The MPX2200 is easy to attach, with
0.1" spacing pins. The MPX2010 would
require a pcb.
First of all, are my calculations correct?
Are these sensors good for this experiment?
Are there alternatives to MPX2010 without
needing a pcb? Thanks.
---------------------------------------------
Original = 101,000 Pa
Minimum = 100,974 Pa
Maximum = 151,470 Pa
Density of water is 1030 kg/mmm
Density of air is 0.26 kg/mmm
Pressure at water level = P(zero) = 101,000 Pa
Below water level:
P = P(zero) + P(water)
= 101000 + 1030 kg/mmm * 9.8 m/ss * X m
Above water level:
P = P(zero) - P(air)
= 101000 - 0.26 kg/mmm * 9.8 m/ss * X m