Spool Inspector
$69.49for selected items
Pairs with 3DSpoolTracker.com
Manage filament inventory, track remaining weight, and flash firmware from the free companion web app.
Visit 3DSpoolTracker.com →Features
- Weigh filament spools in real time with a precision load cell
- Automatically identify spools by scanning QR codes with the built-in camera
- View weight, spool info, and status on the OLED display
- Monitor remotely via the built-in WiFi web dashboard
- Integrates with 3dspooltracker.com for multi-spool tracking and history
All electronic components needed to build a Spool Inspector yourself. Requires some soldering. You will also need to 3D-print the enclosure parts — the STLs are on MakerWorld: Spool Inspector on MakerWorld.
Configure your Camera DIY Kit
Set 0 to skip any item you already have, or raise the count for extras.
Pre-Programmed ESP32S3 Sense$26.00$26.00 each
- • 1× Pre-programmed Seeed XIAO ESP32S3 Sense
- • 2× 7-pin male headers (included from Seeed)
OV5640 $13.99$13.99 each
OLED 1306$3.50$3.50 each
- 5kg Load Cell$5.00
$5.00 each
Piezo Buzzer$1.00$1.00 each
- Heat-Set Insert Pack$1.25
$1.25 each
- • 4× M4×8mm heat-set inserts (knurled brass)
- Screw & Nut Pack$0.75
$0.75 each
- • 4× M2×4mm screws (PCB mount)
- • 4× M4×25mm screws + 2× M4 nuts (load cell)
- • 2× M3×14mm screws + 2× M3 nuts (OLED cover)
- • 4× M3×12mm self-tapping screws (housing to base)
- PCBs with Dupont Connectors$16.00
$16.00 each
LED Strip$2.00$2.00 each
- 100g Calibration WeightOptional$0.00
$6.49 each
- USB-C CableOptional$0.00
$2.50 each
- 3D-Printed PartsOptional$0.00
$65.00 each
Tools you'll need
Includes the crimper plus extra housings and pins
For pressing brass inserts into 3D-printed parts
Klein 11057 — for stripping Dupont hookup wire
- Hex key / screwdriver set
M2, M3, and M4 — for mounting hardware
Consumables
~450g for the full enclosure, scale, and accessories
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Includes 6 months of Pro — free.
Every Spool Inspector unlocks 6 months of 3D Spool Tracker Pro (full Reports & analytics, inventory export, and a higher AI-scan allowance. When the trial ends you keep all of your inventory and 15 AI scans/month, free, for as long as you own a device. Nothing to redeem — connect your Inspector and it's applied automatically.</p>
For detailed specs, firmware updates, and documentation visit 3dspooltracker.com
Use at your own risk. Items sold here are hobbyist DIY electronics intended for experienced makers. Installation may involve soldering, modifying your 3D printer, and working with low- or line-voltage power. You are responsible for proper assembly, safe wiring, and use. We are not liable for damage to your printer or other equipment, personal injury, or other losses arising from installation, use, or failure of these products. By purchasing, you agree to assume all risk.