Arduino Vacuum Gauge Sensor

That makes the math in the arduino sketch so easy.

Arduino vacuum gauge sensor.

At one point in the process it needs to determine the level of vacuum in a chamber and adjust it to within a range of values. The vacuum gauge outputs 0 10vdc. It has a measuring range of 2 9 psi to 36 3 psi absolute. At 50 kpa that signal is about 4 95 vdc so it would be 90 mv per kpa.

Link to my website for diagrams code and resources to recreate my experiments. I need a sensor that can be reasonably accurate down to roughly 28 inches mercury and would connect by a tube. With 0 kpa vacuum on th port the signal out to the arduino would be about 4 96 vdc. The oled screen.

Diymall bme280 humidity temperature sensor barometric pressure sensor module with iic i2c for arduino gy bme280 5v pack of 1pc 4 3 out of 5 stars 68 9 49 9. It outputs a temperature compensated analog voltage that is proportional to an absolute pressure. 3 0 out of 5. May 13 2016 arduino tutorials air arduino code measurement meter mpx5010dp pressure sensor manoj r.

Initial build used a 10k pot in place of a vacuum gauge to make it simpler. Force sensitive resistor thin film pressure sensor md30 60 0 30kg diameter 30mm resistance type thin film pressure sensor force sensing resistor. Also the vacuum version of the sensor is mpxv5050vc6t1 and is made by nxp usa for about 10 each. Ignore the humidity sensor that was for something else.

The digital vacuum gauge is based on the mpxh6250a pressure sensor by freescale. This had to be changed to a 0 5vdc range using a potential divider so it was compatible with the arduino. I can control the vacuum pumps easily enough but it is hard to find a vacuum sensor for the arduino.