Bosch
Bosch GMS 120 Professional Digital Multi-Scanner
$109.48
Best Stud Finders · head-to-head
Bosch GMS 120 Professional Digital Multi-Scanner vs C.H. Hanson 03040 Magnetic Stud Finder
A sourced, side-by-side comparison. C.H. Hanson 03040 Magnetic Stud Finder is cheaper at $14.99. Every spec and price links to its source.
C.H. Hanson
C.H. Hanson 03040 Magnetic Stud Finder
$14.99Cheaper
Which is better: the Bosch GMS 120 Professional Digital Multi-Scanner or C.H. Hanson 03040 Magnetic Stud Finder?
On the specs we track, they're closely matched. The C.H. Hanson 03040 Magnetic Stud Finder is the cheaper at $14.99.
See Bosch GMS 120 Professional Digital Multi-Scanner on Amazon See C.H. Hanson 03040 Magnetic Stud Finder on Amazon
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Bosch GMS 120 Professional Digital Multi-Scanner | C.H. Hanson 03040 Magnetic Stud Finder |
|---|---|---|
| US price | $109.48 | $14.99 |
| Brand | Bosch | C.H. Hanson |
| Released | — | — |
| Max scan depth (in) | 4.75 | 1 |
| Sensing technology | capacitive/inductive multi-mode with automatic calibration; illuminated status ring (green/orange/red) | passive rare-earth magnets (no electronics) |
| Detects wood metal live wire | wood studs, ferrous metal to 4.75 in., non-ferrous metal to 3.125 in., live AC wiring to 2 in. | detects ferrous fasteners (nails/screws) marking wood-stud location; no direct wood or live-wire detection |
| Sensor array width (in) | — | 1.5 |
| Center vs edge find | automatic center finder for detected objects | edge find (locates fastener/stud edge via magnetic pull) |
| Display type | illuminated graphical display | none; built-in rotating bubble vial for level/plumb reference only |
| Calibration method | automatic calibration in each of 3 modes (wood/metal/AC) | none required (purely passive magnetic device) |
| Power source | 9V battery (included) | none (battery-free) |
Sources — Bosch GMS 120 Professional Digital Multi-Scanner: boschtools.com (verified 2026-08-05). C.H. Hanson 03040 Magnetic Stud Finder: acehardware.com (verified 2026-08-05).
What's the difference between the Bosch GMS 120 Professional Digital Multi-Scanner and C.H. Hanson 03040 Magnetic Stud Finder?
Where the two actually differ on the specs we track (7 of 8). Matching specs are omitted.
- Max scan depth (in): Bosch GMS 120 Professional Digital Multi-Scanner 4.75 vs C.H. Hanson 03040 Magnetic Stud Finder 1
- Sensing technology: Bosch GMS 120 Professional Digital Multi-Scanner capacitive/inductive multi-mode with automatic calibration; illuminated status ring (green/orange/red) vs C.H. Hanson 03040 Magnetic Stud Finder passive rare-earth magnets (no electronics)
- Detects wood metal live wire: Bosch GMS 120 Professional Digital Multi-Scanner wood studs, ferrous metal to 4.75 in., non-ferrous metal to 3.125 in., live AC wiring to 2 in. vs C.H. Hanson 03040 Magnetic Stud Finder detects ferrous fasteners (nails/screws) marking wood-stud location; no direct wood or live-wire detection
- Center vs edge find: Bosch GMS 120 Professional Digital Multi-Scanner automatic center finder for detected objects vs C.H. Hanson 03040 Magnetic Stud Finder edge find (locates fastener/stud edge via magnetic pull)
- Display type: Bosch GMS 120 Professional Digital Multi-Scanner illuminated graphical display vs C.H. Hanson 03040 Magnetic Stud Finder none; built-in rotating bubble vial for level/plumb reference only
- Calibration method: Bosch GMS 120 Professional Digital Multi-Scanner automatic calibration in each of 3 modes (wood/metal/AC) vs C.H. Hanson 03040 Magnetic Stud Finder none required (purely passive magnetic device)
- Power source: Bosch GMS 120 Professional Digital Multi-Scanner 9V battery (included) vs C.H. Hanson 03040 Magnetic Stud Finder none (battery-free)