Franklin Sensors ProSensor M90 Stud Finder with 9-Sensors, Wood & Metal Stud Detector/Wall Scanner, Made in The USA
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Best value electronic
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Based on 3 trusted sources
Current price
$25.32
Updated Jun 27, 2026 · 1 min read
Sources behind this verdict
10 reviewers weighted by source trust
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
The 9-sensor ProSensor M90 delivers the core Franklin experience, full-width LED readout, no calibration, at a notably lower price than the M150 or M210. Across r/Carpentry a high-trust user reports it's "very accurate, including double drywall, tile over drywall, metal studs," and homedepot verified reviewers describe it as a repeat purchase: "This is my 3rd ProSensor." An r/DIY thread calls Franklin finders the best, "especially if you're installing baseboards." It lacks the live-wire warning of the M150 and carries a slightly lower 4.4 Amazon average, and the broader r/Tools skepticism about occasional Franklin misreads applies here too. But as the cheapest way into Franklin's multi-sensor approach, the reviewers we read treat it as the value sweet spot for anyone who wants full-width scanning without paying flagship prices.
What reviewers liked
- Cheapest entry into Franklin's multi-sensor full-width design
- High-trust r/Carpentry praise on double drywall and tile
- Repeat-buyer endorsements on homedepot
- No calibration; large ~2,614-review base
Where it falls short
- No live-wire detection unlike the M150
- Slightly lower 4.4 Amazon average
- Battery-dependent
- Shares the r/Tools concern about occasional misreads
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The 9-sensor ProSensor M90 delivers the core Franklin experience, full-width LED readout, no calibration, at a notably lower price than the M150 or M210. Across r/Carpentry a high-trust user reports it's "very accurate, including double drywall, tile over drywall, metal studs," and homedepot verified reviewers describe it as a repeat purchase: "This is my 3rd ProSensor." An r/DIY thread calls Franklin finders the best, "especially if you're installing baseboards."
It lacks the live-wire warning of the M150 and carries a slightly lower 4.4 Amazon average, and the broader r/Tools skepticism about occasional Franklin misreads applies here too. But as the cheapest way into Franklin's multi-sensor approach, the reviewers we read treat it as the value sweet spot for anyone who wants full-width scanning without paying flagship prices.
- Accurate
- More sensors = More accuracy. Conventional stud finders have 1 or 2 sensors. The ProSensor M90 has 9, making it the most accurate stud locator on the market.
- 1 1/2" Deep Scan Always On
- One mode finds it all! The ProSensor M90 adjusts for a variety of depths, materials and textures to find wall studs through sheetrock/drywall and more. No calibration is required, simply press and hold the button to begin scanning. Unlike other stud finders that give false readings, the ProSensor M90 lets you start scanning anywhere, even over a stud.
- Shows The Full Width Of Studs
- See more than just a point on the wall. The LEDs track stud center and edges, showing single studs, double studs and irregular configurations other stud finders cannot detect.
- Detects Wood And Metal Studs
- The ProSensor M90 wall scanner identifies any change in density—wood or metal—no extra buttons required.
- More Info
- Requires two AAA batteries (not included). Is NOT compatible with rechargeable batteries.
It definitely has more sensors than anything else on the market and I like that it does guide you a little bit, but it was giving me bad ...
Franklin Sensors makes wide stud finders with 13 sensors and 13 LEDs, they are much better than your typical hardware store junk stud finder.
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“Franklin Sensors ProSensor M90 Stud Finder Review” · YouTube
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