Manufacturer | Zircon |
---|---|
Part Number | 72296 |
Item Weight | 8.8 ounces |
Package Dimensions | 9.17 x 6.34 x 3.58 inches |
Country of Origin | China |
Item model number | 72296 |
Size | Edge Finding |
Style | A100 |
Material | Plastic |
Pattern | Finder |
Power Source | Battery Powered |
Item Package Quantity | 1 |
Included Components | StudSensor |
Batteries Included? | No |
Batteries Required? | Yes |
Warranty Description | Limited Lifetime Warranty |

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Zircon StudSensor A100 Wall Scanner and Center/Edge Locating Stud Finder with WireWarning Detection
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Purchase options and add-ons
Compatible Devices | Laptop, Desktop |
Power Source | Battery Powered |
Brand | Zircon |
Operating Voltage | 9 Volts |
Global Trade Identification Number | 00042186722963 |
About this item
- WireWarning Detection indicates the presence of live, unshielded electrical AC wiring while scanning in StudScan and DeepScan modes.
- Patented "Over the Stud" Indicator and SpotLite Pointing System ensure the A100 provides trustworthy results
- Ergonomically designed grip allows a comfortable hold on the tool for any size hand, at any angle
- One fully charged 9V battery, not included, is required for the stud scanner to run at optimal performance to help you easily find studs and avoid hazards
Frequently bought together

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From the manufacturer
Zircon Edge-Finding Stud Finder

Zircon
A Tool for Every Job
- Stud Finders
- Metal Detectors
- Circuit Breaker Finders
- Water Detectors
- Drill Guides
- Water Levels
The Zircon Advantage
Zircon's mission is to provide accurate, affordable, and easy-to-use scanning and detecting solutions for DIYers and professional contractors alike.
Zircon's team of Tool Pro Experts know the ins and outs of tools, construction, and the challenges that DIYers and professionals face.
Zircon StudSensor A100
Edge Finding Stud Finder with WireWarning Detection
The StudSensor A100 is a handheld tool dedicated to quickly and efficiently finds the edges of studs and alerts you of live AC wiring. The A100 comes equipped with 2 scanning modes: StudScan and DeepScan.
Locate Studs and Scan for Live AC Wiring Safely and Efficiently
The Zircon StudSensor A100 makes scanning easy. The tool's StudScan finds wood and metal studs up to 3/4 in. (19 mm) deep. DeepScan mode doubles the scanning depth to 1 1/2 in. (38 mm) deep and allows for increased accuracy on deeper targets.
The A100 also includes WireWarning Detection, a safety feature that alerts you to the presence of live, unshielded electrical AC wires while scanning for studs.
Before use, always be sure to install a brand new 9V alkaline battery for optimum performance.
A100 Features
Edge Finding
Before scanning, hold the A100 flat against wall and press the Power Button to calibrate. Be sure not to move the scanner while calibrating. After a short beep sounds, confirming calibration is complete, continue pressing the Power Button and slide the scanner slowly across the surface.
Continue to scan the surface until the stud's center is detected.
The easy-to-read screen will alert you as the stud detector approaches the edge of the stud. Once the edge is detected, the patented arrow-shaped SpotLite Pointer will shine, the translucent base will illuminate, and an audio tone will sound. DO NOT DRILL HERE! Instead, mark the spot in the “V’ marker groove at the head of the tool and continue past the stud. Repeat the process in the opposite direction and mark the opposite edge of the stud. The center of the stud is midway between the two marks.
The center of the stud center is the stud's most secure location. It is critical to drill in the center when mounting heavy objects.
StudScan and DeepScan Modes
Use StudScan Mode to find the edges of wood or metal studs up to 3.4 in. (19 mm) deep.
For best results, always start in StudScan Mode when looking for studs.
If StudScan Mode provides irregular readings the studs might be behind deeper than 3/4 in. (19 mm). Slide the Mode Selector Switch to DeepScan Mode. This doubles the scanning depth to 1 1/2 in. (38 mm) deep and allows for increased accuracy on deeper targets.
Note: WireWarning Detection works in both StudScan and DeepScan Modes. The WireWarning Detection Icon will flash when live, unshielded wires are detected.
WireWarning Detection
Safely Scan in both Modes
WireWarning Detection is a feature that is always on while scanning in StudScan and DeepScan Modes.
It alerts you to the presence of live, unshielded, electrical AC wires up to 2 inches (50 cm) deep.
As you approach an area with live AC voltage, a lightning bolt icon will display on the screen. This is the WireWarning Detection Icon. If your scan directly starts over an area with live AC voltage, the WireWarning Detection Icon will flash.
Note: Please turn off the electricity and use extreme caution in areas where live AC voltage is detected before nailing or drilling.

The Key to Success is the Battery
The installation of a fresh battery with an extended expiration date is required to steadily power the integrated screen in Zircon tool.
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Customer Reviews |
4.4 out of 5 stars 2,214
|
4.3 out of 5 stars 651
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4.4 out of 5 stars 526
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4.4 out of 5 stars 231
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4.3 out of 5 stars 170
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Finds Edges of Studs | ✓ | ✓ | ✓ | ✓ | ✓ |
Finds Center of Studs | no data | ✓ | ✓ | ✓ | ✓ |
WireWarning Detection | ✓ | ✓ | ✓ | ✓ | ✓ |
Metal Scan Mode | no data | no data | ✓ | ✓ | ✓ |
AC Scan Mode | no data | no data | no data | ✓ | ✓ |
ColorTrip Display | no data | no data | no data | no data | ✓ |
ACT (Auto Correcting Technology) | no data | ✓ | ✓ | ✓ | ✓ |
Low Battery Indicator | no data | ✓ | ✓ | ✓ | ✓ |
Signal Strength Indicator | no data | ✓ | ✓ | ✓ | ✓ |

Frequently Asked Questions
Question: Does the StudSensor A100 include a battery?
Answer: No. Zircon stud finders and detectors, particularly those with screens, require and consume a great deal of current from batteries. For optimal performance, a brand-new recently purchased 9V alkaline battery with an extended expiration date is not included but is required to power the A100 properly.
Question: I inserted a 9V battery, but the tool doesn't turn on or is giving me strange readings. Is my tool broken?
Answer: Please be sure to use a fresh, brand new 9V alkaline battery with an extended expiration date. Batteries that may work in a smoke detector or remote control may not have adequate voltage to power the sensing technology in StudSensors.
Question: What is WireWarning Detection?
Answer: WireWarning Detection is a feature that is always on while you are scanning in StudScan and DeepScan Modes to alert you to the presence of live, unshielded electrical AC wires up to 2 in. (50 mm) deep.
Videos
Product information
Technical Details
Additional Information
ASIN | B09CV9TZWW |
---|---|
Customer Reviews |
4.3 out of 5 stars |
Best Sellers Rank | #28,003 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #34 in Stud Finders & Scanners |
Date First Available | August 18, 2021 |
Warranty & Support
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Zircon StudSensor A100 Wall Scanner and Center/Edge Locating Stud Finder with WireWarning Detection
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Product Description
The StudSensor A100 is Zircon’s newest edge locating electronic stud finder that is sold exclusively on Amazon. The A100 is designed with a smooth, ergonomic rubber grip allowing for a comfortable yet secure hold for any size hand, at any angle. This stud finder uses the most recent technology in density detecting software and circuitry. The scanner has 2 scanning modes to locate the edges of wood and metal studs and joists behind walls, floors, and in ceilings up to 1.5 inches (38 mm) deep. In StudScan Mode, the SS A100 locates the edges of shallower wood or metal studs up to 0.75 of an inch (19 mm) deep. Switch over to DeepScan Mode to double the scanning depth to 1.5 inches (38 mm). This stud sensor is programmed with a WireWarning Detection feature that indicates the presence of live unshielded electrical wires up to 2 inches (50 mm) deep when using either stud scanning modes. Finding studs using this edge finding tool is simple. To get started, install one brand new 9V alkaline battery (not included). Place the unit flat against the wall and press the Power Button to calibrate the sensor. Once you hear a beep indicating calibration is complete, continue to hold the Power Button and slowly slide the tool across the surface. The easy-to-read LCD will alert you as the stud detector approaches the edge of the stud in both scanning modes. Once the edge is detected, the patented arrow-shaped SpotLite Pointer will shine, the translucent base will illuminate, and an audio tone will sound. DO NOT DRILL HERE! Instead, mark the spot in the “V’ marker groove at the head of the tool and continue past the stud. Repeat the process in the opposite direction and mark the opposite edge of the stud. The center of the stud is midway between the two marks. Make sure to note whether the WireWarning Detection is alerting you to live, unshielded AC wiring before drilling between the two marks into the center of the stud. With the Zircon StudSensor A100, you can safely maneuver through the most complicated of projects with the professional confidence that comes from owning a Zircon.
Top Brand: Zircon
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find the stud finder works well on hollow walls and accurately locates them, with one customer noting its ability to scan at two separate depths. The tool is simple to use with a quick guide, reliable, and good value for money. However, the accuracy receives mixed feedback, with some customers finding it very accurate while others report erratic results. Additionally, the battery life is negative as no battery is included with the product.
AI-generated from the text of customer reviews
Customers find that the stud finder works well, particularly on hollow walls.
"...This stud finder is reliable and works great for precise tasks like this. I’ll definitely be using it for other projects around the house...." Read more
"Seems to work pretty well.. I only needed it for hanging a mirror in the bathroom. Easy to learn and seemed pretty accurate." Read more
"It's okay for basic detection behind drywall but performs poorly when studs are behind drywall and a shear wall...." Read more
"The Zircon StudSensor A150 Wall Scanner is a versatile and user-friendly tool designed for both DIY enthusiasts like myself and professionals...." Read more
Customers praise the stud finder's accuracy in locating them.
"...Exactly what I needed! This stud finder is reliable and works great for precise tasks like this...." Read more
"I like it very much. It found the studs with no problem. It also Shaws electric wires inside the wall. I an very Satisfied." Read more
"...This unit finds the center of the stud which i like. Works great so far." Read more
"...Sometimes this seems to miss finding the studs and I know it misses pipe and electrical that I have mapped before closing up a wall." Read more
Customers find the stud finder simple to use, with a quick guide attached to the product and easy-to-read results.
"...This tool was easy to use and intuitive, which was a big relief since I was working with wallpaper and had to get it right the first time—no room..." Read more
"...Easy to learn and seemed pretty accurate." Read more
"...In addition it indicates if there are live wires in the wall. It is simple and easy to use - just hold down the side button and glide it across the..." Read more
"The Zircon StudSensor A150 Wall Scanner is a versatile and user-friendly tool designed for both DIY enthusiasts like myself and professionals...." Read more
Customers praise the stud sensor's wire detection capabilities, with one customer noting its accurate edge scanning and another mentioning its ability to indicate live wires in walls.
"...It found the studs with no problem. It also Shaws electric wires inside the wall. I an very Satisfied." Read more
"...In addition it indicates if there are live wires in the wall...." Read more
"...It offers reliable stud detection capabilities, making it a valuable addition to your toolkit. Love it!!" Read more
"Finds studs through many different kinds of materials. The wire locating is kind of weak unless the line is almost touching the back of the wall." Read more
Customers find the stud finder to be good value for money.
"...It's inexpensive but works very well for what I need. No problem going through 3/4" drywall to find a stud...." Read more
"...It made the job alot easier with the stud finder. And it was super affordable so i am happy." Read more
"Very accurate. Great value. Light weight. Easy to use. Small enough to hold with one hand and mark studs with other...." Read more
"...Excellent for the price." Read more
Customers find the stud finder reliable and sturdy.
"Received items as described and in good condition. Also Received items quickly. Worked as described." Read more
"...large wooden structures and usually finds the studs, with great consistency...." Read more
"...Yellow color, easy to find in toolbox. Made to last." Read more
"The quality of this stud finder seems very sturdy and it feels good on your hand. Easy to grip and very reliable...." Read more
Customers have mixed experiences with the stud finder's accuracy, with some finding it very accurate while others report it is not always accurate and has erratic results.
"...Highly recommended for anyone needing an accurate and easy-to-use stud finder!" Read more
"...Poor and/or non-existent sensing was a probleme everywhere. NOT ALSO: If the wall material is not tight againats the stud, it does not sense at all." Read more
"...Easy to learn and seemed pretty accurate." Read more
"...Finds studs okay, a lot of false readings, annoying when working where stud spacing is inconsistent. Electrical detection is very good" Read more
Customers report issues with the battery life of the stud finder, noting that no battery is included with the product.
"...I liked the minimal packaging, but was disappointed it didn't come with a battery." Read more
"Doesn't come with a battery, needs a 9v" Read more
"It doesn't come with a battery but otherwise is very good for my very casual use on around the house projects." Read more
"The stud finder did not come with a battery." Read more
Reviews with images

A fine stud-finder
Top reviews from the United States
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- Reviewed in the United States on January 9, 2025Size: Center FindingStyle: A150Pattern Name: FinderVerified PurchaseI bought the Zircon StudSensor A150 to help find studs in my wall for mounting three TV wall mounts, and it worked perfectly! This tool was easy to use and intuitive, which was a big relief since I was working with wallpaper and had to get it right the first time—no room for mistakes or oversized holes.
Finding the center of the studs was crucial, and this scanner made it simple. I located the center of two studs, marked them, and double-checked to ensure accuracy before drilling. When I finally went for it with a 1/4-inch hole, it was dead-on in the center of each stud. Exactly what I needed!
This stud finder is reliable and works great for precise tasks like this. I’ll definitely be using it for other projects around the house. Highly recommended for anyone needing an accurate and easy-to-use stud finder!
- Reviewed in the United States on March 16, 2025Size: Edge FindingStyle: A100Pattern Name: FinderVerified PurchaseI like it very much. It found the studs with no problem. It also Shaws electric wires inside the wall. I an very Satisfied.
- Reviewed in the United States on March 31, 2025Size: Center FindingStyle: A150Pattern Name: FinderVerified PurchaseSeems to work pretty well.. I only needed it for hanging a mirror in the bathroom. Easy to learn and seemed pretty accurate.
- Reviewed in the United States on March 22, 2025Size: Center FindingStyle: A150Pattern Name: FinderVerified PurchaseThis one is a great improvement over my older model - It is accurate -indicating not only the edges of the studs, but also the centre, with a highly readable panel. In addition it indicates if there are live wires in the wall. It is simple and easy to use - just hold down the side button and glide it across the wall. It's well shaped and sits neatly in the hand.
This one is a great improvement over my older model - It is accurate -indicating not only the edges of the studs, but also the centre, with a highly readable panel. In addition it indicates if there are live wires in the wall. It is simple and easy to use - just hold down the side button and glide it across the wall. It's well shaped and sits neatly in the hand.
Images in this review
- Reviewed in the United States on April 29, 2025Size: Center FindingStyle: A150Pattern Name: FinderVerified PurchaseThe Zircon StudSensor A150 Wall Scanner is a versatile and user-friendly tool designed for both DIY enthusiasts like myself and professionals.
It offers reliable stud detection capabilities, making it a valuable addition to your toolkit. Love it!!
- Reviewed in the United States on March 21, 2025Size: Center FindingStyle: A150Pattern Name: FinderVerified PurchaseIt's okay for basic detection behind drywall but performs poorly when studs are behind drywall and a shear wall. Even the deep scan mode doesn't help.
- Reviewed in the United States on December 6, 2024Size: Center FindingStyle: A150Pattern Name: FinderVerified PurchaseI use this before i tried to mount my tv to the wall. Just takes 1 9v battery and ready to go. easy to use, just hold down button on the side and slowly slide against wall where you want to find the stud. This unit finds the center of the stud which i like. Works great so far.
- Reviewed in the United States on January 5, 2025Size: Edge FindingStyle: A100Pattern Name: FinderVerified PurchaseThe first observation was that the felt type material that contacts the wall keeps the unit from moving smoothly. The contact area should be plastic. When it does move smoothly, it does not detect the same edge in multiple tries. This unit was tested on several different walls and through inexpensive ceramic tile. Poor and/or non-existent sensing was a probleme everywhere. NOT ALSO: If the wall material is not tight againats the stud, it does not sense at all.
Top reviews from other countries
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Ricardo sittaReviewed in Brazil on February 16, 2025
1.0 out of 5 stars Se quiser passa raiva compra
Size: Edge FindingStyle: A100Pattern Name: FinderVerified PurchaseNão presta
- Steven GlendenningReviewed in Canada on February 10, 2025
5.0 out of 5 stars ok
Size: Edge FindingStyle: A100Pattern Name: FinderVerified Purchaseok
- Ali HaiderReviewed in Saudi Arabia on October 10, 2024
5.0 out of 5 stars Excellent
Size: Edge FindingStyle: A100Pattern Name: FinderVerified PurchaseAbove the expectations really helpful & quickly delivered
- AnonymousReviewed in the United Kingdom on August 29, 2024
1.0 out of 5 stars Don’t buy
Size: Edge FindingStyle: A100Pattern Name: FinderVerified PurchaseWaste of money. Unreliable!
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Gilberto CruzReviewed in Brazil on July 8, 2024
1.0 out of 5 stars Não funciona direito.
Size: Edge FindingStyle: A100Pattern Name: FinderVerified PurchaseIneficiente. Deu de fazer nenhuma medição nem deteção com ele.
Tive que devolder.
Nao cumpre as funções anunciadas.