Best Cable Detector for Garages
A cable detector (also called a wire finder or stud finder with AC detection) is essential for any garage workshop to avoid drilling into hidden mains cables. We have compared the top models on detection depth, accuracy, and build quality.
Quick answer
The best cable detector for garages is the Bosch Truvo. It offers reliable AC wire detection up to 1.2 inches and a simple traffic-light display. For a budget alternative with a stud-finder mode, the Stanley S100 is a solid choice.
Why trust ToolBuyerHub
- Tested on specs (power, torque, PSI)
- Battery & ecosystem compared
- Aggregated owner reviews
- Build quality & warranty checked
- Brand reliability
- No fake hands-on claims
Research updated June 2026.
Bosch Truvo
Reliable AC detection with a simple red/green indicator.
| Product | Best For | Detection Depth | Rating | Price |
|---|---|---|---|---|
| Bosch Truvo | Overall / AC Live Wire | 1.2 in | 4.5 / 5 | Check price |
| Stanley S100 | Budget / Stud + Cable | 0.75 in | 4.2 / 5 | Check price |
| Bosch GMS 120 | Deep Scan / Multi-Material | 4.7 in | 4.6 / 5 | Check price |
| Milwaukee 2235-20 | Professional / Builders | 1.5 in | 4.4 / 5 | Check price |
| Draper 32973 | DIY / Value Pack | 0.5 in | 4.0 / 5 | Check price |
Bosch Truvo
Best OverallPros
- Simple red/green traffic-light display
- Compact and lightweight
- Automatic calibration
Cons
- No stud or metal detection
- Battery not included
The Bosch Truvo is a dedicated AC wire detector that is incredibly easy to use. You press the button, and it automatically calibrates. A green light means safe to drill; a red light with an audible beep means live cable detected. Owner reviews consistently praise its reliability for finding live wires behind plasterboard and brick walls.
It is designed specifically for detecting live AC cables, so it will not find pipes or wooden studs. For a simple, no-nonsense tool that focuses on safety in a garage environment, the Truvo is the top choice. It is powered by a standard 9V battery and fits easily in a tool belt.
Stanley S100
Best BudgetPros
- Three detection modes (stud, metal, AC)
- Very affordable price
- Ergonomic grip
Cons
- Shallow AC detection depth
- Can be less accurate on deep cables
The Stanley S100 is a versatile multi-detector that offers stud, metal, and AC wire detection at a budget-friendly price. It is a good choice for a garage where you might also want to locate wooden studs for shelving or metal pipes. The AC detection mode works reliably on standard-depth cables.
Owner reviews note that the AC detection depth is limited to about 0.75 inches, which is fine for most residential wiring but not for deep conduit runs. It is a solid entry-level tool that provides good value for a combined stud and cable finder.
Bosch GMS 120
Best for Deep ScanPros
- Deep detection up to 4.7 inches
- Detects live wires, studs, and metal
- Automatic calibration with center-finding
Cons
- Higher price point
- Larger and heavier than basic models
The Bosch GMS 120 is a professional-grade multi-scanner that can detect live cables, metal pipes, and wooden studs at depths up to 4.7 inches. It is ideal for garages with thick plaster or where cables run deep in conduit. The center-finding feature helps you mark the exact middle of the object.
Owner reviews highlight its accuracy and the clear LCD display. It is a more advanced tool that requires a quick read of the manual for best results. For anyone needing to scan deeply into walls or floors, the GMS 120 is the most capable option.
Milwaukee 2235-20
Best for ProfessionalsPros
- Durable overmold housing
- Good detection depth for live wires
- Bright LED indicators
Cons
- No deep scan mode
- Battery door can be stiff
The Milwaukee 2235-20 is a rugged multi-scanner designed for job site use. It detects live AC wires, metal, and studs up to 1.5 inches deep. The overmold body protects against drops, and the bright LEDs are easy to read in a dim garage. It is a reliable tool for tradespeople.
Owner reviews appreciate its build quality and consistent performance on standard-depth cables. It does not offer the deep scanning of the Bosch GMS 120, but it is a very solid all-around detector for most garage applications.
Draper 32973
Best DIY Value PackPros
- Very low price point
- Simple operation
- Good for shallow cables
Cons
- Shallow detection depth
- No stud detection
The Draper 32973 is a basic cable and metal detector that is ideal for the occasional DIY user. It is very affordable and simple to use, with a single button for operation. It works well for detecting live cables running near the surface of garage walls.
Owner reviews note that it is a good value for the price, but it is not suitable for deep or thick walls. It is best for light-duty tasks like hanging a shelf or picture frame in a garage with standard drywall.
What to check before buying a cable detector for garages
Garages often have thicker walls, concrete, or metal studs. Check that the detector can handle these materials. Look for a model with a detection depth of at least 1 inch for standard plasterboard. For brick or block walls, consider a deep scan model like the Bosch GMS 120.
Also consider the detection modes. A dedicated AC wire detector is simpler and often more reliable for live wires than a multi-scanner. If you also need to find studs or metal pipes, a multi-mode tool is better.
Mistakes to avoid when using a cable detector
A common mistake is not calibrating the detector on a clear area of the wall. Always hold the tool flat and move it slowly. Another error is relying on a detector for non-live cables. Most detectors only find live AC wires, not disconnected or low-voltage cables.
Do not assume the detector is 100% accurate on all surfaces. Always use a cable detector as a guide and drill with caution. For deep or complex walls, consider using a cable avoidance tool (CAT) for higher reliability.
FAQs
What is the best cable detector for a garage?
The Bosch Truvo is the best overall for its simple AC detection and reliability. For a budget option, the Stanley S100 offers good value.
Can a cable detector find wires in concrete walls?
Yes, but you need a deep scan detector like the Bosch GMS 120, which can find cables up to 4.7 inches deep in concrete.
Do cable detectors work on metal studs?
Yes, many multi-scanners like the Milwaukee 2235-20 can detect metal studs as well as live cables.
How deep can a standard cable detector detect?
Standard cable detectors typically detect live wires up to 1.2 inches deep. Deep scan models can detect up to 4.7 inches.
Is a cable detector the same as a stud finder?
No, a cable detector specifically finds live AC wires, while a stud finder locates wooden or metal studs. Some tools combine both functions.
Do I need a professional cable detector for my garage?
For most home garages with standard drywall, a basic detector like the Bosch Truvo is sufficient. Professionals may prefer the Milwaukee 2235-20.
Can a cable detector find non-live wires?
No, most standard cable detectors only detect live AC wires. They cannot find disconnected or low-voltage cables.
What is the difference between AC and multi-mode detection?
AC detection only finds live wires. Multi-mode detection can also find studs, metal pipes, and sometimes rebar.
How do I calibrate a cable detector?
Place the detector flat against a clear area of the wall and press the calibration button. Move it slowly across the wall.
Are cable detectors accurate on textured walls?
They can be less accurate on textured walls. Calibrate on a smooth area if possible, and move the detector very slowly.
Our verdict
For most garage users, the Bosch Truvo is the best overall cable detector due to its simplicity and reliable AC detection. If you need a budget-friendly multi-detector, the Stanley S100 offers good value. For deep scanning, choose the Bosch GMS 120.