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Bar02 Alternative?

I have been using the Bar02 for a couple of years now. The problems I have with this sensor are:

  • Sensors fail after about 4 months submerged (I can’t dry them out every day)
  • Drift over time is significant
  • Offsets can be large, so I have to calibrate each sensor individually, and track which sensor is which, so I can apply the correct offset
  • Drift with temperature is significant, making readings unreliable when temperature fluctuates.

I am attempting to measure shallow depths (less than 1 m), so accuracy is critical, and the drift on these sensors is poor. The sensor stays in the water for up to 6 months (being pulled out when the water freezes - Oct to April).

I see that you have a Bar100 based on the Keller LD series. I was wondering if it were possible to produce a high accuracy equivalent to the Bar02, but using one of the lower range Keller LD sensors? say the absolute 0-1 bar or 0-3 bar sensors.

This would eliminate all the complicated libraries as the calculations are performed within the sensor, and should allow a more stable and accurate sensor.

I understand that it would be more expensive than the Bar02, but I am currently on my fifth Bar02 in 2 years, so I’ve already spent nearly $500 on sensors that just aren’t very good. I would happily pay for a more accurate, reliable sensor, that would hopefully last 6 months submerged.

I’m using a RPi to read the temperature/pressure, as well as several other sensors (including barometric pressure to derive a depth reading).

What do you think? would this be possible? even as an experiment?