Analog Water Pressure Sensor Range
Russel.Metlitzky 2025-12-20 06:43:34 198 Views1 Replies I purchased the Gravity: Analog Water Pressure Sensor recently and am setting it up with my Pico W. I'm confused on some documentation. The sticker on the sensor says it's output voltage is 0.5-4.5V and it's range is 0-1.6MPa. When looking on the DFRobot wiki page for this sensor, the specifications of the sensor shown on the page says it's range is 0-1.6MPA but the comments in the example code below that shows “Output Voltage: 0.5-4.5VDC (linearly corresponding to 0-1MPa)” The code then shows a correlation of 250 KPa to 1V. This came from a voltage range of 4V (4.5 minus 0.5) and a range of 1MPa which is 1,000kPa. So, 1000/4 = 250kPa per volt. BUT, if the range is really 1.6MPa then I should be using 400kPa per volt, correct? So, what is the range I should be using? 1MPa or 1.6MPa?
To add to my original post, does it seem odd that my zero voltage is 0.75V instead of something closer to 0.5V? And if that's correct, should my range now be 3.75V (4.5-0.75) instead of 4V and should I be using 1600kPa/3.75V for 426.67 kPa/V?
Russel.Metlitzky 
