Raspi Zero Housing for BK-G4 Gas Meter (Version 2)
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€0.06 – €0.07 net (excluding VAT)
For file: knob_V2 v9_0.2mm_PLA_MK3S_3m.gcode
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- Weight reported by the author
- 1 g
- Print time reported by the author
- 3 min
- Source material
- PLA
- Estimate material
- PLA
- Estimate printer
- Bambu Lab P1S - 0.4 nozzle
- Estimate process
- 0.20mm Standard
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Housing to attach a Raspi Zero to a Standard BK-G4 Gas Meter. The Housing has space for a reed contact and the Zero.
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Model information
- Source
- Printables
- Category
- Electronics
- License
- Creative Commons — Attribution — Noncommercial
This project started with the rising gas prices. I wanted to have much better resolution of the gas usage in my house. Understanding when gas is burned should give me a better idea how to save it.
The standard gas meters (in my case the BK-G4T) usually have a magnet rotating with the last digit. Means you can capture the position of the magnet with a reed contact.
The housing of the gas meter has an opening to fit a sensor, and right there this raspi case places the reed contact. The housing itself is clamped to the gas meter, thats where you´ll need the tiny “knob” model.
Assembly of the case requires
4* M2.5*6mm
7* M2.5*8mm
1* M2.5*12mm
1* M2.5*20mm
14* M2.5 Nuts
so just get a pack of M2.5 screws ;)
For the electrical part I used a plastics 14x2.5mm Reed contact. This size fits well into the slot. Easy to find on Amazon or an electronics shop.
The model prints nicely on my MK3S+.
You´ll probably need to clean the notches where the nuts are placed, but that´s it.
If you´re looking for Python3 code (incl. Grafana Dashboard) to make the whole thingy run on a Raspberry Zero W: You can check my GitHub for that.