Bosch D-tect 200 C vs D-tect 120 UK: Is the 200 C Worth It?
The Bosch D-tect 120 and D-tect 200 C are Bosch Professional’s two radar wall scanners. Both find live cables, metal, wood and water-filled plastic pipes, but the 200 C costs more than twice as much. Here is how D-tect 200 C vs D-tect 120 compares, and whether the extra depth and features are worth it for your work.
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Buy the D-tect 120 if you mainly drill into drywall, blockwork and normal masonry, as it already finds every object type Bosch lists, including plastic pipes, to 120 mm in metal. Buy the D-tect 200 C if you core or fix into thick concrete, need to find underfloor heating, want leak detection, or need screenshots to document what was in a wall.
D-tect 200 C vs D-tect 120 at a Glance
| Feature | Bosch D-tect 200 C | Bosch D-tect 120 |
|---|---|---|
| Max detection depth | 200 mm (metal in dry concrete) | 120 mm (metal) |
| Other objects | 80 mm in other wall types | Live cables 60 mm |
| Wooden substructures | 38 mm | 38 mm |
| Accuracy | ±5 mm | ±10 mm |
| Wall types | Concrete, early-age concrete, brick (incl. coring brick), drywall, panel heating, universal | Drywall, concrete, universal |
| Views | Object, Signal, Signal 2D and Spot view | Spot view |
| Extra functions | Leakage detection, distance measurement, screenshots | Centre finder with direction indicator |
| Data export | USB-C and micro-SD card | None listed |
| Dust and water | IP5X | Not stated by Bosch |
| Power | 12V battery or 4 x AA | 12V battery or 4 x AA |
| Weight | Approx. 0.7 kg | Approx. 0.5 kg |
| Bosch UK price (Nov 2026) | About £655 inc VAT (with AA batteries) | About £259 inc VAT (with AA batteries) |
The Key Differences
Detection depth
The D-tect 200 C reaches 200 mm for metal in dry concrete, against 120 mm for the D-tect 120. Bosch lists 80 mm for other objects in other wall types on the 200 C, and 60 mm for live cables on the 120. Both find wooden substructures to 38 mm. If you drill thick slabs, lintels or concrete walls and need to know where the rebar is, the extra depth is the main reason to step up.
Wall types and underfloor heating
The D-tect 120 has three settings: drywall, concrete and universal. The 200 C adds early-age concrete, horizontal and vertical coring brick, and a panel heating mode for underfloor and wall heating pipes. For plumbers and heating engineers working on wet underfloor systems, that dedicated mode is a real difference.
Leak detection and documentation
Bosch lists leakage detection and distance measurement as extra functions on the 200 C, plus a screenshot feature. Screenshots can be downloaded over USB-C or from the micro-SD card, which is useful if you need to show a client or main contractor what was behind a wall before you drilled. The D-tect 120 has no data export.
Accuracy, size and price
Bosch quotes ±5 mm accuracy for the 200 C and ±10 mm for the 120. The 200 C is heavier at about 0.7 kg against 0.5 kg, but it is IP5X dust protected and has a 3.5 inch colour display with four different views. Both run on four AA batteries or a Bosch 12V battery, so either fits a Bosch 12V kit. On Bosch’s own UK site the 200 C is about two and a half times the price of the 120.
The Two Bosch Radar Scanners
1. Bosch Professional D-tect 120
Best value radar scanner for most tradesRadar that finds live and non-live cables, water-filled plastic pipes and magnetic and non-magnetic metal, with drywall, concrete and universal modes, spot view, and AA or 12V battery power. Bosch lists 120 mm maximum depth for metal and ±10 mm accuracy.
2. Bosch Professional D-tect 200 C
Best for concrete, underfloor heating and documenting jobs200 mm depth for metal in dry concrete, a panel heating mode, leak detection, distance measurement, screenshots you can export over USB-C or micro-SD, four view modes on a 3.5 inch colour display, ±5 mm accuracy and IP5X protection.
Which Should You Buy?
- Electricians and second-fix trades in drywall and blockwork: D-tect 120 is usually enough.
- Plumbers and heating engineers working on underfloor heating: D-tect 200 C, for its panel heating mode and leak detection.
- Groundworkers, builders and anyone coring concrete: D-tect 200 C, for the 200 mm depth.
- Contractors who need proof of what was in the wall: D-tect 200 C, as it saves screenshots.
- Want something cheaper? See our D-tect 120 vs GMS 120 comparison and our best wall scanners guide.
Frequently Asked Questions
Is the Bosch D-tect 200 C worth it over the D-tect 120?
Only if you need what it adds. The 200 C detects metal to 200 mm in dry concrete against 120 mm, adds a panel heating mode, leak detection and screenshots, and is more accurate at ±5 mm. For drilling into normal walls, the D-tect 120 finds the same object types for much less money.
Can the Bosch D-tect 120 find plastic pipes?
Yes. Bosch lists water-filled plastic pipes among the objects the D-tect 120 detects. The D-tect 200 C lists both empty and water-filled plastic pipes.
Does the D-tect 200 C detect water leaks?
Bosch lists leakage detection as an additional function of the D-tect 200 C. The D-tect 120 does not list a leak detection function.
Do the D-tect 120 and 200 C use the same batteries?
Yes. Both run on four AA batteries or a Bosch Professional 12V battery, so they fit into an existing Bosch 12V system.
Can you trust a wall scanner completely?
No. A wall scanner reduces the risk but is not 100 percent reliable. Follow safe zone rules and isolate circuits where you can before drilling near cables.
Related Guides
- All Tool Comparisons UK
- Bosch D-tect 120 vs GMS 120 UK
- Best Wall Scanners UK
- Apprentice Plumber Tool List UK
- Black Friday 2026 Tool Deals for UK Tradespeople
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