USDOT Number Reader
High-speed Mainline
Low-speed Weigh Stations

Get real-time automated intelligence to accelerate throughput, enforce compliance, and ensure safety.

The Perceptics USDOT Number Reader captures a high-contrast monochrome image of the USDOT, VIN and Motor Carrier numbers on commercial vehicles, day and night, with industry-leading accuracy. Perceptics USDOT Number Readers have processed millions of images of commercial vehicles from all U.S. and Mexican states and Canadian provinces. The system can stand alone or be easily integrated with all current WIM technology.

When paired with the Perceptics License Plate Reader or Hazmat Placard Reader software, officials have multiple vehicle datapoints with which to make quick and informed decisions. 

Product Hightlights

  • Accuracy of 90% on over 80% of commercial vehicles
  • Accurately reads multiple fonts, and in different locations and orientations on the vehicle
  • Mainline and ramp applications available
  • Standard and wide angle options maximize image capture based on site geometry and vehicle speed
Benefits + Features

Reads USDOT, VIN and Motor Carrier Numbers in numerous fonts, sizes, and locations

Fast image processing to ensure minimal latency from time of image capture to when data is reported

Doesn't miss reads due to speed – reads USDOT number types and fonts on vehicles traveling up to 75 mph

Convenient Web interface for remote status and configuration

Scalable architecture and proven integration with WIM and other systems

Can be easily upgraded to read hazmat placards


System Components

Ultra high resolution imager:

  • 5MP camera with pre-selected and pre-set lens
  • Embedded OCR software to read USDOT numbers

Stroboscopic illuminator with front panel filter kit

Post mounting kit

Optional trigger sensors, posts, cables, and junction boxes are available

Power & I/O

Imager: 120VAC, 50/60HZ, 55W

Illuminator: 120VAC, 200W (static), 1250W (peak)

10/100 Mbps Ethernet port

Operating Conditions

Operating Temp: -40°F to 158°F (-40°C to 70°C)

Humidity: 10%~90% (non-condensing)

Protection Rating: IP67

Physical Characteristics


  • Dimensions: 6.6"W x 6.4"H x 12"D (168mm x 163mm x 305mm)
  • Weight: 9.8 lbs (4 kg)


  • Dimensions: 7.7"W x 7.4"H x 22.7"D (196mm x 188mm x 577mm)
  • Weight: 23 lbs (10.5 kg)

Material: Anodized aluminum sun shield, extruded anodized aluminum body

Connectors: 3-pin power, 4-pin signal, 6-pin trigger, Ethernet

Ultra-High Resolution Imaging & Illumination

Externally triggered

5MP resolution

Field of View (depends on lane geometry): 11' - 20'

Operating Range (depends on lane geometry):

  • Wide Angle: 11.5' - 22'
  • Standard Angle: 16.5' - 45'

Lens Options:

  • Wide Angle: 12.5mm - 25mm
  • Standard Angle: 16mm - 50mm

Vehicle Speed:

  • Wide Angle: up to 45mph 
  • Standard Angle: up to 75mph

Full images (compressed or uncompressed); patch images also available

Light Source: Xenon gas discharge lamp

Illuminator Output: 12 joules

Recharge Time: 200 ms

Lamp Life: 40,000,000 flashes

Image Sensor

Sensor Size: 2576 x 2048 active pixels

Sensor Type: Quad Super eXtended; Graphics array (QSXGA) CMOS

Sensor Readout: Random programmable region of interest (ROI), global shutter

Optical Size: One inch

Pixel Size: 4.8μm x 4.8μm

Pixel Bit Depth: 10-bits

High Dynamic Range (HDR)

On-chip Fixed Pattern Noise (FPN) Correction

Automatic Exposure Control (AEC)

Serial Peripheral Interface (SPI)