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Laser Cutter Exhaust Filter Pressure Drop Monitor
Purpose
Monitor the performance and effectiveness of filters
Determine end of life for filter media
Help determine when to order new filters
History
Built/tested 11/25/18
Installed 12/09/18
Readings
Date | Stage 1 PD | Stage 2 PD | Stage 3 PD |
12/12/18 | 0.40 | 2.15 | 0.90 |
12/15/18 | 0.00 | 0.00 | 0.00 |
All values measured in inches of water column (in.w.c.)
Measurements include pressure sensor correction factors (Stg1=-0.26, Stg2=-0.28, Stg3=-0.24)
Design/Construction
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Uses three differential pressure transducers, 5 VDC, 20 mA
Arduino Uno v.3 with code borrowed from various sources
Custom shield (a very crappy perforated board with several wire/solder connections)
Scrap metal enclosure box is a salvaged air conditioner relay box from Brant's attic