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Boulder, CO, 80301


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Robotic and automation sensors for 1D laser rangefinders (LIDAR), 2D scanning lasers or LIDARs, 3D time-of-flight cameras, digital compasses, programmable USB hub, programmable ethernet controlled relays, programmable USB controlled relays.

LightWare SF33T/B (50 meter)

LightWare SF33TB R384.jpg
LightWare SF33TB R384.jpg

LightWare SF33T/B (50 meter)


by LightWare Optoelectronics

The LightWare SF33T/B is a medium range (0-50m), multi-beam laser sensor designed specifically for UAV obstacle detection and precise terrain hugging.  

SKU# R384-SF33T-B

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The SF33T/B is a multi-beam laser sensor for obstacle detection and precise terrain hugging. The sensor creates a triangular beam pattern using three laser beams, each of which provides an independent distance reading. The beam pattern is tailored to match a 45 degree downwards-and-forwards looking obstacle detector and altimeter configuration. The beams are spaced 5 degrees apart. When approaching the ground or an obstacle the physical separation between the projected laser spots gets closer together so that they cover a smaller area when close to an an obstacle but a much wider area when further away. This multi-beam capability along with a very high-speed update rate makes this product unique in sense-and-avoid applications.

The three beams each update 3052 times per second (9156 times per second total) allowing them to detect small obstacles. The three distance readings can be used independently to indicate the slope of the terrain, or together to provide collision warnings.

All connectors and cabling are provided with the unit.  


  • Easy to configure using the built-in menus and LightWare Terminal software
  • Fully calibrated and ready to run
  • Complete with power, interface and micro USB cables


LightWare Product Comparison Chart

LightWare SF33 Manual


Weight 35g (excluding cables)
Range 0-50m (natural targets)
Resolution 1m to 0.03m selectable
Update rate 9156 readings per second (3052 readings per second per beam)
Accuracy +/-0.1m (70% reflective target @ 20 degrees C)
Outputs & Interfaces serial and analog
Power supply voltage 5.0V +/- 0.5VDC
Power supply current  250mA (maximum)
Laser power 20mW (peak), 11mW (average), Class 1M
Dimensions 30 x 56.5 x 50mm
Operating Temperature 0 to 40 degrees C
Approvals FDA - pending
Optical aperature 51mm
Beam divergence  0.2 degrees
Lens material acrylic
Connections Plug & socket, micro USB