Franklin Sensors ProSensor M210 13-Sensor Stud Finder
- Stud Finder
- Plastic
- Wall Mount
- Push Button
- Better rated than 60%
A wide-sensor scanner with a genuinely useful live wire warning, backed by consistently positive owner feedback on accuracy.
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How it ranks among the 10 stud finders we track
4.6★ across 6,300 Amazon ratings, Bayesian-smoothed toward the category average.
6,300 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
8,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 10 stud finders we track - how the scorecard works · full stud finders data report. Confidence: high - strong rating volume and complete data.Updated 8 days ago. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Franklin Sensors ProSensor M210 is a 13-sensor wall scanner that adds live wire detection to Franklin's full-width stud display, with a deep scan mode rated to about 1.7 inches into wood or metal.
The M210 is built on the same 13-sensor array as Franklin's ProSensor 710+, lighting up across a stud's full width instead of a single point, but it adds live wire detection and a pencil caddy that model does not have. Unlike that model, it is listed as compatible with rechargeable AA batteries.
- 13-sensor wide-array scanning
- Live wire detection
- Deep scan to about 1.7 inches
- Bubble level and pencil caddy built in
Who it's for
Homeowners and repeat DIYers who want to see a stud's full width and center on one pass while also getting a warning on live wiring before cutting into a wall. Reviewers describe using it for hanging TVs, shelves and mirrors as well as for cutting into walls near known wiring.
What buyers say
From Amazon customer reviews.
Buyers consistently praise the accuracy of both the stud and live wire detection, calling it reliable across projects like hanging TVs, shelves, mirrors and cutting into walls near wiring. The built-in level and pencil caddy come up as liked extras. The one recurring caveat, raised by a longtime home renovator, is that it can occasionally show a misleading reading, which clears up once you sweep the spot again rather than trusting a single pass.
Strengths and trade-offs
Drawn from this product's published specifications.
- Full stud width and center display
- Live wire detection built in
- Compatible with rechargeable AA batteries
- Built-in bubble level and pencil caddy
- Batteries not included
- Occasional false readings reported until re-swept
- No calibration option if a reading looks off
Performance notes
Like the 710+, the M210's 13 sensors read a wide strip of wall so the LED display can show a stud's full width and mark its center, with no calibration needed before scanning. Its deep scan mode is rated to about 1.7 inches and covers both wood and metal, and it adds live wire detection so the display flags energized wiring in the same pass. It runs on two AA batteries, not included, and unlike the 710+ it is listed as compatible with rechargeable batteries.
Specifications
| Brand | Franklin Sensors |
|---|---|
| Model | 317740851 |
| Dimensions & fit | |
| Item Weight | 11.4 ounces |
| Item Dimensions | 7.5 × 3.4 × 3.3 inches |
| Capacity & performance | |
| Output Type | Push Button |
| Lower Temperature Rating | 32 °F |
| Upper Temperature Rating | 110 °F |
| Power & efficiency | |
| Maximum Supply Voltage | 3 volts |
| Construction & materials | |
| Material Type | Plastic |
| Compatibility & installation | |
| Mounting Type | Wall Mount |
| Included components | |
| Unit Count | 1 |
| Included Components | Range |
| Other details | |
| Number of Items | 1 |
| Sensing Distance | 1.7 inches |
| Specific Uses For Product | Wall Drilling Jig Electrician |
| Current Rating | 150 milliamps |
| Part Number | FSM21012HD |
| Style Name | Compact |
| Item Highlight | High-Accuracy Stud Finder Wall Scanner, Wood and Metal Stud Detector, Made in the USA, Shows Full Width of Studs |
| Measurement Accuracy | 1.7 |
Other Franklin Sensors stud finders
How it compares
This product against the closest alternatives we track in stud finders.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Franklin Sensors ProSensor M210 13-Sensor Stud FinderThis product | 4.6 / 5 | 6,300 | 4.6 / 5 |
| CRAFTSMAN Stud FinderCraftsman | 4.2 / 5 | 23,800 | 4.5 / 5 |
| The Original StudBuddy® Magnetic Stud FinderThe StudBuddy | 4.5 / 5 | 16,000 | 4.5 / 5 |
| DEWALT Stud Finder, 3/4”, Locate Framing Studs Efficiently with LED Arrows, Ideal for…Dewalt | 4.1 / 5 | 5,500 | 4.4 / 5 |
| Klein Tools MSF100 Magnetic Stud Finder and LevelKlein | 4.6 / 5 | 609 | 4.4 / 5 |
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Questions about the Franklin Sensors 317740851
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the Franklin ProSensor M210 detect live wires?
Yes. It adds live wire detection to the same 13-sensor stud display used on Franklin's other ProSensor models.
Can I use rechargeable batteries in the M210?
Yes. Unlike Franklin's ProSensor 710+, the M210 is listed as compatible with rechargeable AA batteries.
What do owners say about its accuracy?
Multiple reviewers report it consistently finds studs and wires correctly, though one longtime DIYer noted it occasionally shows a reading that clears up once you sweep the area again.