Active Locating, Depth Estimation & Route Tracing — The Full Kit
Passive detection tells you where live power cables are. But what about dead cables, de-energized services, gas mains, and metallic pipes that aren't carrying a signal? For those, you need to put a signal on the line — and that's exactly what the Leica DD120 Depth Package is built to do.
The included DA175 1-Watt Signal Transmitter injects an active electromagnetic signal directly onto any metallic service. The DD120 then locates it, traces its route, and measures its depth to within ±10% accuracy. This is the tool HDD contractors use before directional drilling, and what utility locating technicians rely on for full-service mapping before excavation.
Carry bag included. This is the complete CAT and genny kit — passive detection for live services, active tracing for everything else.
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 | Depth Pkg Art. 6014155 |
Device Only Art. 872939 |
Plumbers Pkg Art. 6014159 |
|---|---|---|---|
| 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: Device Only (Art. 872939) | Plumbers Pkg (Art. 6014159)
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 | + 83kHz, 131kHz | Auto, Power, Radio, 8kHz, 33kHz | + 512Hz, 640Hz |
| Max Detection Depth | 23 ft (7m) | 10 ft (3m) | 10 ft (3m) |
| Depth Accuracy | ±5% | ±10% | ±10% |
| Current Measurement | ✓ | — | ✓ |
| GPS / Data Logging | ✓ | — | — |
| Bluetooth | ✓ | — | — |
| Li-Ion Battery Option | Optional | — | — |
| Warranty | 3 Years | 1 Year | 1 Year |
| 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
Related Items
Leica Trace Rod 50
50cm flexible rod for locating non-metallic drains, ducts, and PVC pipes when used with a signal transmitter.
Leica Trace Rod 80
80cm flexible rod for deeper non-metallic pipe and drain tracing when used with a signal transmitter.
Leica Transmitter Clamp 850280 (4inch)
100mm (4") clamp applies a traceable signal to buried conductive utilities. Lightweight and robust.
Leica Midi Sonde 8/33kHz 850289 - Dual Frequency Sonde for Non-Metallic Pipe Location
Dual frequency sonde for tracing non-metallic drains, sewers, and non-conductive utilities.
Leica Property Plug Connector 850284 - US Cable Set for Live Power Cable Tracing
US cable set for applying a traceable signal to live electricity power cables when used with a signal transmitter.
Manuals & Downloads
PDFs provided by Leica Geosystems. Branded CT versions available — call 1-877-866-5721 for print copies.
Questions Our experts are ready.
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