AR4000 User’s Manual
2
LLL004001 – Rev 2.7
2. General Description
The AccuRange 4000 is a laser diode based distance measurement sensor for
ranges up to 50 feet, with 0.1 inch accuracy. There are three models, the 4000-
LV, 4000-LIR, and 4000-RET. The 4000-LV emits visible light (red, 670 nm
wavelength), while the 4000-LIR and 4000-RET uses near infrared light (780 nm
wavelength). The 4000-LIR is a Class IIIb laser product, available in power
levels of 8 mW (standard), or up to 20 mW with the High Power Laser option.
The 4000-LV is a Class IIIa laser product. The 4000-RET is a Class I eye safe
product for use with retroreflective tape. The labels shown below appear on the
AccuRange 4000-LV and 4000-LIR.
The 4000-LIR and 4000-RET have lower measurement noise and greater
sensitivity and maximum range. The 4000-LV features visible light output. See
the relevant descriptions in the Performance and Measurement Accuracy section
for noise and range information. Custom configurations of the AccuRange 4000
are also possible.
The AccuRange 4000 operates by emitting a modulated, collimated beam of laser
light and converting the distance to the target surface to an RS-232 or RS-
422/485 output. The range may be read via the serial cable as digital data, or
from the optional analog current loop output. A second cable supplies power to
the AccuRange 4000 and brings out other signals, which include reflected signal
strength, sensor temperature, and background light level. When configured for
use with the AccuRange 4000 High-Speed Interface and host-resident calibration
software, uncalibrated pulse-width modulated output is also available on this
cable.
4000-LIR: Emitter: 780 nm IR laser diode
Optical power 20 milliwatts max.
Effective Range: 50 feet
4000-LV: Emitter: 670 nm red laser diode
Optical power: 5 milliwatts max.
Effective Range: 40 feet
INVISIBLE LASER RADIATION
AVOID DIRECT EXPOSURE TO BEAM
Class IIIb
780 nm Laser Product
DANGER
DANGER
LASER RADIATION
AVOID DIRECT EYE EXPOSURE
Class IIIa
670 nm Laser Product