Topcon DL-503 Digital Auto Level – Advanced Digital Leveling with 28x Magnification
The Topcon DL-503 Digital Auto Level delivers accurate, efficient, and easy-to-use digital leveling for construction, civil engineering, and surveying professionals. Combining robust technology with field-ready durability, the DL-503 provides precision distance and elevation measurement with minimal manual input. With a working range of up to 328 feet (100 meters), the DL-503 ensures fast and highly accurate data capture using advanced “Wave-and-Read” technology.
Designed for real-world job site performance, the DL-503 features a 28x magnification telescope, ±0.8mm height accuracy per kilometer (double-run), and a high-efficiency pendulum compensator system. Its IPX4 water-resistant rating and solid construction ensure reliability even in tough environments. A backlit LCD, 2,000-point internal memory, and long battery life support productivity from start to finish.
Key Features
- 28x Magnification: Clear, detailed viewing for long-range measurements.
- Height Accuracy: ±0.8 mm/km double-run for dependable elevation readings.
- Distance Accuracy: ±10 mm at 10 meters ensures consistent measurement results.
- Wave-and-Read Technology: Automatically takes precise readings with minimal operator effort.
- Fast Measuring Time: 3-second single measurement capture for improved field efficiency.
- Backlit LCD Display: Easy visibility in various lighting conditions.
- Pendulum Compensator with Magnetic Damping: Reduces measurement errors due to movement and vibration.
- Automatic Inverted Staff Recognition: Correctly interprets staff orientation and adjusts display accordingly.
- Internal Memory: Stores up to 2,000 points for robust data logging.
- IPX4 Water Resistance: Suitable for use in light rain and humid environments.
- Rechargeable Li-ion Battery: Provides up to 16 hours of field operation.
Technical Specifications
| Specification | Topcon DL-503 |
|---|---|
| Magnification | 28x |
| Height Accuracy | ±0.8 mm/km double-run |
| Distance Accuracy | ±10 mm at 10 m |
| Measuring Range | 5.2 ft – 328 ft (1.6 m – 100 m) |
| Measuring Time | Approx. 3 seconds |
| Compensator | Pendulum with magnetic damping |
| Compensator Working Range | ±15′ |
| Tilt Sensor | Not available |
| Display | 128×32 dot-matrix LCD with backlight |
| Keyboard | 8 keys (7 front, 1 side) |
| Internal Memory | 2,000 points |
| External Storage | Not supported |
| Interfaces | RS-232C |
| USB Port | Not available |
| Water Resistance | IPX4 |
| Operating Temperature | -4°F to +122°F (-20°C to +50°C) |
| Dimensions | 10.1″ D x 6.2″ W x 7.2″ H |
| Weight | 5.3 lbs (2.4 kg) |
| Battery Type | BDC46B Rechargeable Li-ion (7.2V) |
| Battery Life | Up to 16 hours |
Applications
- General Construction: Perfect for foundation leveling, site layout, and grading.
- Civil Engineering: Supports high-precision projects requiring repeatable, reliable elevation data.
- Surveying: Excellent for topographic and boundary surveys with digital data recording.
- Infrastructure Projects: Ideal for railways, roads, and utilities requiring long-distance leveling.
Product Benefits
- Minimal learning curve – easy to operate for professionals and technicians alike.
- Enhanced productivity through automatic measurement features.
- Robust construction for everyday job site wear and tear.
- Reliable in harsh weather and rugged conditions.
- Clear digital display reduces reading errors and misinterpretation.
Comparison Table: Topcon DL Series
| Model | Magnification | Height Accuracy | Memory | Wave-and-Read | Display | Battery Life | Water Rating |
|---|---|---|---|---|---|---|---|
| DL-501 | 32x | ±0.2 mm | 10,000 points | Yes | LCD Graphic + LED | 14 hours | IP54 |
| DL-502 | 32x | ±0.6 mm | 2,000 points | Yes | Dot-matrix LCD | 16 hours | IPX4 |
| DL-503 | 28x | ±0.8 mm | 2,000 points | Yes | Dot-matrix LCD | 16 hours | IPX4 |
Package Includes
- Topcon DL-503 Digital Auto Level
- Rechargeable Battery (BDC46B)
- Battery Charger
- User Manual
- Hard Carrying Case
Frequently Asked Questions (FAQs)
Q1: How accurate is the DL-503 for height measurements?
A1: The Topcon DL-503 delivers a height accuracy of ±0.8 mm per kilometer in double-run leveling, making it ideal for precision tasks in construction and civil engineering.
Q2: Can the DL-503 recognize an inverted staff automatically?
A2: Yes, it has an auto-recognition feature that detects inverted barcode staffs and adjusts the displayed values accordingly.
Q3: What is the memory capacity of the DL-503?
A3: The internal memory can store up to 2,000 data points, sufficient for most day-to-day leveling operations.
Q4: Is the DL-503 weatherproof?
A4: It is IPX4 rated, meaning it is protected from water splashes, making it suitable for use in light rain and humid environments.
Q5: How long does the battery last during field use?
A5: The included Li-ion battery provides up to 16 hours of continuous operation on a full charge.
Maximize your productivity and measurement accuracy with the Topcon DL-503 Digital Auto Level. Engineered for professionals who demand precision and durability in every project.















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