UNI-T UT387D Wall scanner
The UT387D is a modern wall scanner from UNI-T designed to help users reveal what lies beneath walls, ceilings, and floors without making any damage. It has a clean, ergonomic shape that feels solid in hand yet is light enough for one-hand operation. The front has simple controls and an LCD screen that visually represents what the scanner is detecting as you move it along a surface. Whether renovating, installing fixtures, or preparing to drill holes, it gives users insight into hidden elements – metal, wood, or live wires.
Because it’s a tool used in construction, finishing, and building maintenance, the UT387D is designed with everyday usability in mind. It is battery powered (built-in rechargeable) which reduces fuss with replacing heavy batteries. Its body is compact and balanced, making scanning along large surfaces less tiring. The screen gives immediate feedback as icons or indicators light up when beams, wires, or pipes are detected, helping to guide positioning. When in use, its response is intended to be intuitive: as you slide or sweep the device, alerts or visual cues help you know when you’re over something embedded.
Despite being relatively simple in operation, the UT387D aims for reliability. It includes auto-power off to conserve power, and is built to tolerate ordinary environmental conditions (like moderate humidity and varying wall textures) without losing detection ability. Its size and carrying form make it suitable for both professional jobs and home DIY, helping ensure safety before drilling or cutting into walls. Overall it’s made to give confidence to users: to see behind surfaces, avoid hidden obstacles or hazards, and guide safe decision-making in construction or repair tasks.
Features:
- Detects metal objects, wooden beams, and live AC wires behind walls.
- Built-in rechargeable Li-ion battery.
- Color LCD display for detection feedback.
- Multiple detection modes (metal, AC wire, foreign body/wood batten).
- Voice/vocal alert or audio indication when detection occurs.
- LED / visual alerts + buzzer sound notifications.
- Calibration function before scanning.
- Auto-power off after idle time.
Specifications:
| Specifications | UT387D |
| Certificates | CE, RoHS, FCC |
| Detect principle | Electro-magnetic induction |
| Detects | Wooden beam, metal object, electric wire |
| Metal-scan depth | 100mm @iron pipe; 80mm @brass pipe |
| Stud-scan depth (wood) | 38mm |
| AC electric wire depth | 50mm |
| Detect accuracy | ±15mm @28.5mm depth drywall |
| Notifications | Voice |
| GENERAL CHARACTERISTICS | |
| Power | 3.7V 300mAh Li-ion |
| Product net weight | 112g |
| Product size | 135 x 60mm x 25mm |
Applications:
- Locating studs or wooden beams behind walls.
- Detecting metal objects (rebar, pipes) behind surfaces.
- Identifying live (AC) electrical wires in walls.
- Finding foreign bodies (wooden batten, etc.) under plasterboard / drywall.

Package Contents:
- 1× UNI-T UT387D Wall Scanner unit
- 1× Micro-USB charging cable
- 1× Carrying bag or protective pouch
- 1× User manual (English)
Documents:
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