eOUTIL ST100 Stud Finder Wall Scanner
- 9 volt battery powered
- LED and beeping display
- 3/4 inch wall thickness
- Wood and metal detection
- 3.2 ounces, yellow plastic
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A small battery powered stud finder with LED and beep alerts for wood studs and metal. Scan depth is only given as a wall thickness in the title.
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ASIN: B089M1WDQHModel: ST100Category: Stud Finders
Overview
A sensor in the head reads the wall as the unit slides across it, then signals with LED lights and a beep. The yellow plastic body runs on a nine volt battery.
Wall scanners save drilling exploratory holes before hanging shelves and mirrors. Beep and LED cues give quick feedback. The listing says little about accuracy or whether it detects live wires, so treat it as a rough guide.
Who it's for
Renters and DIYers locating studs before mounting shelves or TVs will find the signal easy to follow. Pros scanning thick or textured walls should choose a stronger scanner.
Pros and cons
- LED and audible alerts
- Detects wood and metal
- Compact handheld size
- Light at a few ounces
- Live wire detection not listed
- Accuracy not stated
- Scan depth listed only in the title
- Battery not clearly included
Performance notes
The sensor responds to changes in density behind the wall surface, so calibrating on an empty area first improves results. Textured walls and wall thickness affect readings. Repeating the scan from both directions confirms stud edges.
Specifications
| Brand | eOUTIL |
|---|---|
| Model | ST100 |
| Dimensions & fit | |
| Scan depth | 3/4 inch |
| Item Dimensions L X W X H | 2.56 x 1.57 x 1.57 inches |
| Item weight | 3.2 ounces |
| Power & efficiency | |
| Power Source | Battery Powered |
| Battery Type | 9V |
| Construction & materials | |
| Material Type | Plastic |
| Color | Yellow |
| Included components | |
| Unit Count | 1 Count |
| Other details | |
| Display Type | LED/Beeping |
| Functions | Wood and metal |
| International Protection Rating | IP54 |
| Operating Frequency | 10 KHz |
| Recommended Uses For Product | Metal Detection |
Closest rivals on specs
CH Hanson 03040 Magnetic Stud Finder- Item Weight 0.2 vs 0.13 pounds (+54%)
Klein Tools MSF100 Magnetic Stud Finder- Item Weight 0.2 vs 0.11 pounds (+82%)
Frequently asked questions
How deep can the eOUTIL scan?
The title names a wall thickness of 3/4 inch. The specs give no other scan depth.
Does the eOUTIL find wires?
The listing names wood and metal detection but not live wires.
What battery does the eOUTIL use?
The listing says 9V.