Hydrometer - Humidity measurement

thingiverse

An instrument built to measure humidity Fill 100% Print time <3h Printed by using PET-G You need: rubbed with alcohol human hair 150mm toothpick - 2 round 5mm bamboo sushi sticks, length 170mm - 2 (can use M5 screw) M3 nut - 5 M4 nut - 1 M3 20mm screw - 1 M3 30mm screw -1 M3 scrap screw 15mm - 1 Assembly: 1.Set scale 2.Glue the top and the bottom 3.Install weights on the arrow 4.Attach hair as pictured 5.Assemble with screws arrow and up tuning system Arrow need to achieve a slight rotation.Polishing hole, and use silicone oil. If its possible varnish wood. For attach hair you need to use toothpick ends. You needto firmly fix the bamboo stick and hair. You can calibrate in this way. 1. Turn on the kettle and boil water 2. Wait a little, place the device over the steam 3. Wait for the full swing of the arrow to the right 4. Adjust the screw to the last position of the scale