Humidity Meter Case 3

I wanted a reasonably accurate humidity meter for my dry box.  Since I'm starting to use nylon, the humidity readings needed to measure really low humidity levels.  The UNI-T333BT meter meets my requirements.  It can measure humidity levels down to 0%; impressive!

The UNI-T meter comes in a case that was unsuitable to mount on my dry box.  In addition, I wanted the meter to display a reading all the time.  The meter includes remote Bluetooth monitoring capabilities, too.  

All this metering capability meant a higher capacity battery.  Whilst I'm at it, I included a battery charging circuit with a USB Typce C charging port.  The bigger battery gives the meter the ability to remain continuously on for months between charges.

The requirements translated into the need for a bigger enclosure to house the revisions.  I designed a custom 3D front panel for the meter and an enclosure to fit over all the electronics (old and new), but fitted from the dry box inside.  The enclosure is secured by four 5g (3.5mm) by 15mm self tapping screws.

The revised meter box is intended to be stuck to the side of my dry box with double sided tape.  The dry box needs a small cutout so that the buttons and USB C socket are reachable externally.

Parts List:
- UNI-T UT333BT Humidity Meter
- 1S 4056 BMS USB C Module
- 18650 battery holder
- 18650 battery

This is my 3D design.  I hope you find it useful, too.

My print is made in PETG 1.75mm 3DFillies black filament, with 0.2mm layer height and 15% infill on a PRUSA I3 MK3S printer.

I hope you can find this print useful, too.