It has a range of 328' and it has accuracy up to 3/8" up to 33' for distance. It is accurate to 1/32" per kilometer double-run for height. All the data can be stored in the internal memory, up to 2,000 measurements. Once you are done collecting the data, it can be transferred to a computer using a serial port.

When using the Topcon DL 503 28X Digital Auto Level outdoors, it is water resistant, so it is protected against damage. It is also stable and will compensate for vibrations do to the pendulum and magnetic damping system. This makes it useful in construction areas, like along roadways and on bridges. It gathers data by using a telescope that is pointed at the staff, bring it in focus, and then simply push the button. The RAB-code staff can be used by waving it letting the system take the readings.

Features:

• Internal memory of 2,000 points

• Range of 328'

• Built-in measurement programs

• Wave and read technology

• Up to 16 hours of battery life

• LCD display

• Keypad

• Rating of IPX4 against water

• 28x magnification

• 360-degree range

Includes:

• Topcon DL 503 28X Digital Auto Level 60892

• Hard carrying case

• Hex wrench

• Vinyl cover

• BDC46B Li-Ion battery

• CDC68 charger

• Power cable

• User manual

• 1-year manufacturer's warranty

Specifications:

General

Protection Class	IPX4 (protected against splashing water)
Weight	5.3 lbs (2.4kg)
Warranty	1-year
Tripod Thread	5/8-11
Self-Leveling	yes
Units of Measure	Degrees, mm, m, in, ft
Dimensions	6.2 x 10.1 x 7.2 in (15.8 x 25.7 x 18.2 cm)
Height Measurement
Working Range	5.3 ft. to 328 ft. (1.6 m to 100 m)
Measuring Time	<2.5 seconds
Minimum Light for Measurement	20 lux at the surface of staff (with natural light)
Least Count	0.001 m, 0.01 ft.
Distance Measurement
Time	<2.5 seconds
Range	5.3 ft. to 328 ft. (1.6 m to 100 m)
Display and Keypad
Type	LCD (128 x 32 dot)
Keys	8 keys (7 keys on front panel, 1 key on side panel)
Backlight	yes
Telescope
Magnification	28x
Objective Aperture	1.41 in.(36 mm)
Resolving Power	3.5"
Field of View	1°20'
Minimum Focus	5 ft. (1.5 m)
Image	Erect
Stadia Ratio	100
Stadia Constant	0
Compensator
Type	Magnetic damping and pendulum mechanism
Range	±15'
Temperature
Operating	-4°F to +122°F (-20°C to +50°C)
Storage	-40°F to +158°F (-40°C to +70°C)
Battery/Power
Power Source	Rechargeable Li-Ion BDC46
Battery Life	16 hours
Battery Life Alert	yes
Features
Circular Level Sensitivity	10'/2 mm
Adjustment Knobs	2
Interface	RS-232C
Memory	2,000 measurements
Accuracy
Distance	±10 mm at 10 m
Height	0.8 mm per km double run
Functions
Single Measurements	yes
Continuous Measurements	yes
Average	yes
Elevations	yes
Height Differences	yes
Cut and Fill	yes
Distance Stakeout	yes