Bourdon Tube

This is the beginning of plans for the construction of a working pressure/vacuum gauge In addition to printing the sensor (Bourdon tube) the required connecting link, 4.5 inch case, graduated dial and pointer can also be printed. The single stage 12:1 or 16:1 ration movement can be sourced along with the window, inlet tube and pressure fitting. The .250 inch diameter inlet tube can be adhesively bonded to the sensor, preferably using two part epoxy. The range of the Bourdon tube is whatever pressure it takes to move the tip hole about 4mm, keeping it within the tube material's elastic limit. The sample shown was printed in PLA+ just for demo purpose. DISCLAIMER: Before putting this into service the tube would have to be coated with something and by some spray or dip process to make it leaktight. DO NOT EXPOSE THE TUBE TO POSITIVE PRESSURE GREATER THAN 15 PSIG TO PREVENT BODILY HARM OR TEMPERATURE GREATER THAN 30C. DO NOT PRESSURIZE WITH ANY MEDIA OTHER THAN NITROGEN, COMPRESSED AIR OR WATER.