Spool Inspector
$37.00
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
What's Included
- •(1) Spool lnspector Main PCB
- •(1) Spool lnspector Button PCB
- •(1) Pre-Programmed ESP32S Sense Module
Additional Information
This product contains the bare PCBs as well as a pre-programmed ESP32S Sense. You will need the OV5640 and everything else specified in the BOM. This kit just avoids having to flash the binary to the chip the first time. This chip will be plug and play and will get all future updates automatically over the air.
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 3 months of Pro — free.
Every pre-built Spool Inspector unlocks a free subscription to 3D Spool Tracker Pro (3 months for camera units and 12 months for RFID units). That includes full Reports & analytics, inventory export, and an unlimited AI-scan allowance. When your subscription, ends you keep all of your inventory and 20 AI scans/month, free, for as long as you own a device even if you don't renew. </p>
On top of everything the free account contains, your Pro subscription includes:
- Reports and cost analytics — what you've spent, what your inventory is worth, cost per print, usage trends over time. Free accounts only see a summary.
- Unlimited AI photo scans — photograph a spool label and it fills in brand, material, color, and print settings automatically. Free accounts get 15, any device owner gets 20.
- Full data export and account backup — every spool as a CSV, or your entire account as a single file. Your data, yours to take.
- Unlimited paired Inspectors, so adding a second scale later costs nothing.
- Access to the public API and WebHooks so you can build your own integrations (Home Assistant, etc)
When the subscription is up, nothing breaks and nothing charges you. Reports and cost analytics stay unlocked and AI scanning continues at the 20/mo level for as long as you own the device. Everything you've entered stays exactly where it is.
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.