Price: $29.79
(as of Oct 28, 2025 15:35:26 UTC – Details)
Product description
Higher Accuracy. Better Technology
The Franklin Sensors Family
Shows FULL WIDTH of studs
LEDs track stud center and edges simultaneously, showing single studs, double studs and irregular configurations other stud finders cannot detect.
More Sensors = More Accuracy
Conventional stud finders have 1 or 2 sensors. The ProSensor M90 has 9 accuracy-enhancing sensors.
Deep Scan Always On
One mode finds it all! Franklin Sensors stud finders auto-adjust for different wall’s texture, depth and material. Works through interior sheetrock/drywall and more.
Accurate and Easy
Just press and hold the button to start finding studs. No calibration required. Unlike conventional stud finders that give false readings, Franklin Sensors stud finders let you start scanning anywhere, even over a stud.
Proudly Made in the USA
All Franklin Sensors products are Made in the USA. We believe that high-quality products make high-quality projects, and we strive for excellence from beginning to end of our production process.
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Customer Reviews
4.5 out of 5 stars 868
4.4 out of 5 stars 2,174
4.5 out of 5 stars 3,286
4.6 out of 5 stars 2,054
4.6 out of 5 stars 4,577
Price
$21.96$21.96 $29.79$29.79 $39.97$39.97 $56.00$56.00 $59.97$59.97
Number of Sensors
7 9 9 13 13
Detection Depth
1.5″ 1.5″ 1.5″ 1.7″ 1.7″
Number of LEDs
7 9 15 13 21
Built in Bubble Level
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Live Wire Detection
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Pencil Caddy
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Precision LED Display
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Frequently Asked Questions
What does the center green light mean?
In certain models, the center LED will turn green to indicate the exact center of the stud.
What does the single blinking light mean?
Several of our models now have a low battery indicator. When the battery voltage is low, the second LED from the right will flash. Replace with two brand new batteries.
Why do the LED lights flash when I first press the button?
In certain models, the LED lights will flash when you first press the button to assure you that the unit is on and receiving power.
What batteries can I use?
The ProSensor M90 is not compatible with rechargeable batteries. For best results, use two brand new, non-rechargeable AAA batteries,
What materials do your stud finders detect through?
Sheetrock/Drywall
Our stud finders work best through a single layer of sheetrock/drywall.
Lath and Plaster
While many customers have reported success using our stud finders through lath and plaster, detection is not guaranteed due to irregularities in plaster thickness.
Incompatible Surfaces
We do not recommend using our stud finders through stucco, exterior siding, double layers of sheetrock/drywall (common in condos, townhomes and home theaters), tile, wood flooring, carpet or roofing.
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.
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