Manufacturer | Franklin Sensors |
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Place of Business | Franklin Sensors, 6675 N Pollard Ln, Meridian, ID 83646, United States, Tel. +1 (208) 918-2403 |
Item model number | ProSensor M150 |
Product Dimensions | 14 x 7.6 x 5.1 cm; 145.15 g |
ASIN | B0917TH83L |

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Franklin Sensors Prosensor M150/X990 Stud Finder with Live Wire Detection & 9-Sensors, Wood & Metal Stud Detector/Wall Scanner
Purchase options and add-ons
Brand | Franklin Sensors |
Colour | Yellow |
Batteries required? | No |
Material | Plastic |
Power source | Battery Powered |
Item weight | 145 g |
Product Dimensions | 14L x 7.6W x 5.1H Centimetres |
Extended length | 14 Centimeters |
Adjustable length | No |
International protection rating | IP54 |
About this item
- Higher Accuracy, Better Technology: With 9 patented sensors, the M150 detects studs more accurately
- Safety Live Wire Warning: The ProSensor M150 includes a live wire warning for worry-free drilling
- Shows Full Width of Studs: The wide LED display shows the stud's center and edges simultaneously
- Deep Scan, Always On: The ProSensor M150 auto adjusts for depth, material and texture up to 1.5 in
- Important Info: 2 non-rechargeable AAA batteries required, not included
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Product details
- Batteries : 2 AAA batteries required.
- Is discontinued by manufacturer : No
- Product Dimensions : 14 x 7.6 x 5.1 cm; 145.15 g
- Date First Available : April 15 2021
- Manufacturer : Franklin Sensors
- Place of Business : Franklin Sensors, 6675 N Pollard Ln, Meridian, ID 83646, United States, Tel. +1 (208) 918-2403
- ASIN : B0917TH83L
- Item model number : ProSensor M150
- Country of origin : USA
- 鶹 Rank: #5,825 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement)
- #10 in Stud Finders
- Customer Reviews:
Product Description

Higher Accuracy. Better Technology
The Franklin Sensors Family
Shows the 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 M150 has 9 accuracy-enhancing sensors.
Deep Scan Always On
One mode finds it all! Franklin Sensors stud finders auto-adjust for different walls' 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.
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 M150 is not compatible with rechargeable batteries. For best results, use two brand new, non-rechargeable, AAA batteries (not included).
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, brick, concrete, wood flooring, carpet or roofing.
Product information
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Safety Information
Warns of electrical voltage
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Customer reviews
Customers say
Customers like the functionality, ease of use, and accuracy of the metal detector. They mention it works well for deep scans, simplifies the job, and makes any mounting task straightforward and precise. Customers also appreciate the wide LED display that clearly shows the full width of studs. They also say the product is of good quality, safety, and has a sensor depth.
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Customers like the functionality of the metal detector. They mention it works well for deep scans up to 1.5 inches on various materials and makes it easy to find studs.
"Best stud finder I have ever used!..." Read more
"...this thing works great! I wasn't expecting much...." Read more
"...Franklin is a great stud finder but to pricy…" Read more
"Works great!" Read more
Customers like the ease of use of the metal detector. They mention it's simple to use, simplifies the job, and makes any mounting task straightforward and precise. Customers also say the stud and open circuits are very easy to read and use.
"...Overall, this stud finder is accurate, easy to use, and provides extra safety—highly recommend for DIY enthusiasts!" Read more
"...It clearly shows the full width of studs, making any mounting task straightforward and precise...." Read more
"...Makes my cheap stud finder look like a paper weight. It so easy and so accurate..." Read more
"...stud finder ever, shows exactly where it is, with the red lights , simple to use no annoying beeping or guessing, wish I found this earlier" Read more
Customers are satisfied with the accuracy of the metal detector. They mention it's incredibly accurate and can mark off the edge of the studs.
"...Overall, this stud finder is accurate, easy to use, and provides extra safety—highly recommend for DIY enthusiasts!" Read more
"Accurate, safety focused and quality..." Read more
"...The Franklin Sensors ProSensor stands out with its incredible accuracy, thanks to its advanced multi-sensor technology...." Read more
"...It so easy and so accurate Ask my jobs will look like a pro did it with construction plans and a blueprint. A must have for every home owner" Read more
Customers like the display of the metal detector. They mention it clearly shows the full width of studs, making any mounting task straightforward and precise.
"...It clearly shows the full width of studs, making any mounting task straightforward and precise...." Read more
"...Wide LED Display: Shows studs' center and edges, making alignment a breeze. -..." Read more
"I use this stud finder at least three times a week , shows the full width of the stud and open circuits , very easy to read and use" Read more
Customers are satisfied with the quality of the metal detector. They mention it's accurate, safety-focused, and the price is right.
"Accurate, safety focused and quality..." Read more
"Great product but expenside..." Read more
"Price is right and it is a great product...." Read more
Customers are satisfied with the safety of the metal detector. They mention it's accurate, easy to use, and provides extra safety.
"...feature is the integrated live wire detection, which adds a crucial layer of safety, giving you peace of mind when drilling into walls...." Read more
"...Safety Feature: The live wire warning gives peace of mind when drilling, preventing accidents. -..." Read more
"Accurate, safety focused and quality..." Read more
Customers appreciate the depth of the metal detector. They mention the advanced multi-sensor technology provides precise stud detection, making it easy to find studs.
"...stands out with its incredible accuracy, thanks to its advanced multi-sensor technology...." Read more
"...Pros: - High Accuracy: The 9 sensors provide precise stud detection, making it easy to find studs. -..." Read more
"Best sensor I’ve ever used and I’ve tried many...." Read more
Top reviews from Canada
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- Reviewed in Canada on June 21, 2025Verified Purchase...this thing works great!
I wasn't expecting much. My trusty Zircon Stud Sensor (third one I've owned over the years) was on its last legs and I was set to buy another. I've used them for work for years and I never buy the top of the line because their "center of the stud" technology never works the way they claim...the only way to actually find the real center of a stud (or beam, or pipe, or whatever is in the wall) with a Zircon in my experience is to approach it from the left, mark the wall as soon as it reads something, then approach it from the right and do the same. Manually figure out the center from those two marks....do *not* just go from left to right and mark the right edge as soon as the light goes out, because it reads differently approaching the stud than it does leaving it.
So it seems that Zircon has changed their lineup and I couldn't find one with the features that I wanted but without all the bells and whistles that I didn't want, making me decide to try this Franklin instead.
I've used it once...and it works just as they say it does. Very happy with it. I may even buy the best one now and keep this as a spare.
- Reviewed in Canada on June 27, 2025Verified PurchaseThis stud finder is an absolute must-have! The Franklin Sensors ProSensor stands out with its incredible accuracy, thanks to its advanced multi-sensor technology. It clearly shows the full width of studs, making any mounting task straightforward and precise. A standout feature is the integrated live wire detection, which adds a crucial layer of safety, giving you peace of mind when drilling into walls. It's incredibly user-friendly, automatically adjusting for depth and material, allowing it to scan up to 1.5 inches deep. For anyone tackling home projects, this tool simplifies the job, ensures accuracy, and prioritizes safety. Highly recommended!
- Reviewed in Canada on July 4, 2025Verified PurchaseI have used many study finders over the past 40 years and been disappointed with most. You absolutely get what you pay for. This little beauty is spot-on accurate, and detects electrical wires for safety. No more “surprise” misses into drywall. Worth the money for a professional tool!
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Reviewed in Canada on August 20, 2023Verified PurchaseMarche bien pour Les stubs mais si si sûr par rapport à l'électricité
- Reviewed in Canada on June 15, 2025Verified PurchaseChat gpt said it’s idiot proof but still needed the wife’s help to open the battery cover. Otherwise works great!
- Reviewed in Canada on April 27, 2025Verified PurchaseBeen using this brand for a long time now, they do stop working after a few years of dropping them, haha and I get a new one right away, no stud finder that I've had works as well
- Reviewed in Canada on February 11, 2025Verified PurchaseThe ProSensor M150 is a fantastic stud finder with excellent features that make home projects much easier.
Pros:
- High Accuracy: The 9 sensors provide precise stud detection, making it easy to find studs.
- Safety Feature: The live wire warning gives peace of mind when drilling, preventing accidents.
- Wide LED Display: Shows studs' center and edges, making alignment a breeze.
- Deep Scan: Works well for deep scans (up to 1.5 inches) on various materials and textures.
Cons:
- Battery Not Included: It requires 2 AAA batteries, which aren't included, so make sure to have them on hand.
Overall, this stud finder is accurate, easy to use, and provides extra safety—highly recommend for DIY enthusiasts!
- Reviewed in Canada on April 26, 2025Verified PurchaseI like it, only regret is that I found out there is one with a built in level after I purchased this one.
Top reviews from other countries
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Gérard CuraReviewed in France on March 22, 2025
3.0 out of 5 stars Avis détecteur
Verified PurchasePas efficace pour toutes les détections (chevrons).
- Ian CantwellReviewed in the United Kingdom on July 9, 2025
5.0 out of 5 stars Quality Baten Finder...... And then some.
Verified PurchaseI have tried many Baten finders, most are unreliable, the rest are just gimmicks, that just don't work. Cheap or expensive it's very hard to find one that's "The real deal" I needed one for a job, so I thought I would try this. The Franklin Industries ProSensor X990. Well, I must say, I was very impressed. Every reading I tried was bang on. No false readings just accurate readings every time. It also finds power cables behind plaster boards and 2 ⚡ symbols illuminate yellow when found. One thing I thought was cool is, when the red leads find a Baten, it's center led turns green to indicate center of Baten. And......... it's very very accurate. Great product, for a reasonable price. They do have higher priced models but, this was fine for what I needed. Highly recommended.
Ian CantwellQuality Baten Finder...... And then some.
Reviewed in the United Kingdom on July 9, 2025
Images in this review
- MarkReviewed in Australia on January 19, 2024
5.0 out of 5 stars Uncannily good: don't waste your money on anything else.
Verified PurchaseThe media could not be loaded.
Maybe I'm just too dumb to use them, and that would be fair enough. What I can say is that I recently had a wall built, and I took the time to photograph and measure where the studs were before the drywalling was installed: none of my existing meters came anywhere close to detecting where the studs actually were.
Enter the Franklin Sensors device. No beeps, no calibration, doesn't seem to care if you happen to have a hand resting on the drywalling etc. You stick it on the wall and you turn it on. That's it. I tested it on the new wall that I had built, and it found every stud exactly where I knew it was because I had photos to prove it.
I also found that the Franklin was able to detect the metal studs used to hang ceilings from with great accuracy, and that, together with wooden studs in the walls, is all I need. Finally, a real advantage of the Franklin is that it shows the exact thickness of the stud, and you can see where it starts and ends. None of this uncertainty about whether you are finding the start, end or centre of the stud.
As I said above, perhaps it's my lack of competence with other units, but this thing just works and that suits me just fine.
- AlbuquerqueReviewed in the United States on May 12, 2025
5.0 out of 5 stars Great stud sensor.
Verified PurchaseFinally a stud sensor that works every time. It really finds the exact center of a stud quickly and also finds electrical wiring. I have had two other sensors which had marginal success. This unit worked first time every time. The only place it had a little trouble was on an exterior wall with insulation and stucco mesh behind the drywall. It differentiated fairly well and with a little practice, I was able to get a fairly accurate result on the exterior wall. It is intuitive and easy to use. Really happy with the accuracy of the sensor.