The Locator Alone — For Professionals Who Already Have What They Need
The Leica Detect DD120 Device Only is the locator unit — nothing more, nothing less. If you're a contractor who already owns a DA175 signal transmitter, a Midi Sonde, or other locating accessories, this is the right buy. You get a fresh, professional-grade DD120 without paying for equipment you already have.
Out of the box, the DD120 performs passive detection in Power mode (detecting live 60Hz energized cables) and Radio mode (picking up signals already present on buried services) — no transmitter required for these modes. It's the everyday carry for utility crews who need a reliable CAT before they break ground.
Need full active locating capability? Pair it with a DA175 Signal Transmitter for depth estimation and route tracing, or add a Midi Sonde for non-metallic drain and sewer work. Both are available separately — or consider the Depth Package or Plumbers Package if you need the complete kit.
Active field use — tracing buried utilities before excavation
Precise depth and route detection of buried services
Built for professional performance on demanding job sites
Key Features
Multiple Detection Modes
Auto, Power, Radio, and Transmitter modes detect a wide range of buried utilities without manual frequency selection.
Depth Estimation
Measure line and sonde depth from 0.3m to 3m (1–10 ft) with ±10% accuracy when used with a signal transmitter.
Hazard Zone Indicator
Visual alert warns the operator when the locator detects a buried utility in close proximity — before you dig.
Audio Guidance
85 dBA tone guidance at 30cm helps operators accurately trace buried utilities by sound in noisy site conditions.
15-Hour Battery Life
6× AA alkaline batteries deliver a full day of continuous operation without recharging. Standard batteries available anywhere.
IP54 Weatherproof
Protected against dust ingress and water splashes — designed and tested for demanding construction job site conditions.
Available Configurations
What's In The Box
All packages include the same DD120 locator — the difference is the accessories included.
← Scroll to compare all options →
| Included Item | Device Only Art. 872939 | Plumbers Pkg Art. 6014159 | Depth Pkg Art. 6014155 |
|---|---|---|---|
| DD120 Utility Locator | ✓ | ✓ | ✓ |
| Batteries (6× AA) | ✓ | ✓ | ✓ |
| User Manual | ✓ | ✓ | ✓ |
| 1-Year Warranty | ✓ | ✓ | ✓ |
| Midi Sonde 8/33kHz Non-metallic pipe tracing | — | ✓ | — |
| Locator Bag | — | ✓ | — |
| DA175 Signal Transmitter Depth estimation & tracing | — | — | ✓ |
| System Carry Bag Fits locator, transmitter | — | — | ✓ |
| Price | Add to Cart |
Also available: Plumbers Pkg (Art. 6014159) | Depth Pkg (Art. 6014155)
Device Only What You Need to Know
The DD120 Device Only is the locator unit alone. It works as a standalone tool for passive detection — picking up signals from live, energized power cables and metallic utilities already carrying current (Power mode, 60Hz) or a signal (Radio mode). No additional equipment is required for this use.
However, for full utility locating capability, you will also need:
- DA175 Signal Transmitter (Art. 949370) — Required for depth estimation, tracing dead/de-energized cables, and active route tracing. Included in the Depth Package.
- Midi Sonde (Art. 850289) — Required to locate non-metallic and PVC pipes, drains, and sewers. Included in the Plumbers Package.
- Carry Bag (Art. 850276 or 872942) — Recommended for safe transport and storage on the job site.
Already own a DA175? The Device Only is the right choice — you get a fresh DD120 locator that pairs directly with your existing transmitter and accessories. Not sure which package is right for your application? Call us at 1-877-866-5721 — we'll help you figure it out.
Technical Specifications
| Power Detection | 60Hz mains frequency |
| Radio Frequencies | 15kHz – 60kHz |
| Active Transmitter Modes | 8kHz, 33kHz |
| Auto Mode | Power, Radio, 33kHz |
| Line Depth Range | 0.3m – 3m (1ft – 10ft) |
| Sonde Depth Range | 0.3m – 3m (1ft – 10ft) |
| Depth Accuracy | ±10% (to undistorted signal) |
| Audio Output | 85 dBA at 30cm |
| Environmental Rating | IP54 |
| Operating Temperature | -20°C to +50°C (-4°F to +122°F) |
| Battery | 6× LR6 (AA) Alkaline |
| Battery Life | 15 hours continuous at 20°C |
| Weight (with batteries) | 2.7 kg / 5.95 lbs |
| Dimensions (H×W×D) | 760 × 250 × 85 mm |
| Compatible Transmitter | DA175 Signal Transmitter (Art. 949370) |
| Certifications | CE, FCC |
| Warranty | 1 Year |
| Article Number | 872939 |
Compare DD Series Models
| Feature | DD120 ← You Are Here | DD130 | DD300 CONNECT |
|---|---|---|---|
| Detection Modes | Auto, Power, Radio, 8kHz, 33kHz | + 512Hz, 640Hz | + 83kHz, 131kHz |
| Max Detection Depth | 10 ft (3m) | 10 ft (3m) | 23 ft (7m) |
| Depth Accuracy | ±10% | ±10% | ±5% |
| Current Measurement | — | ✓ | ✓ |
| GPS / Data Logging | — | — | ✓ |
| Bluetooth | — | — | ✓ |
| Li-Ion Battery Option | — | — | Optional |
| Warranty | 1 Year | 1 Year | 3 Years |
| Starting Price |
See the Leica DD Series in Action
Meet the Leica Utility Detection Expert
Leica's own detection specialist explains how to locate buried utilities faster, safer, and simpler — recorded live at Bauma, the world's largest construction equipment trade show.
Leica DD SMART Utility Locators — Complete Solution
See the full DD SMART portfolio in action — locators, signal transmitters, and DX Shield software working together to map buried utilities across multiple sites.
Leica Utility Detection — See It In Action
A cinematic look at the Leica DD series in the field — searching for buried utilities around the world. See why professionals trust Leica before they break ground.
Leica DD300 CONNECT Utility Locator
The professional-grade DD300 CONNECT with GPS, Bluetooth, color display, and ±5% depth accuracy to 23 feet — the complete solution for utility detection teams.
DD SMART — Built-In Health Check Feature
See how the DD SMART runs a full self-diagnostic — calibration, Hazard Zone, and maintenance checks in seconds before you head to the job site.
Virtual Utility Demo
Virtual Utility Demo
Experience Leica utility detection in action. Choose your scenario — from GPR mapping to electromagnetic locating — and see exactly how the technology works before you buy.
▶ Watch from StartChapters
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View Product →Manuals & Downloads
PDFs provided by Leica Geosystems. Branded CT versions available — call 1-877-866-5721 for print copies.
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