Infrared USDOT
Number Reader
Easy Vehicle Identification

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

The Perceptics Infrared USDOT Number Reader captures USDOT, VIN and Motor Carrier numbers on commercial vehicles, day and night, using infrared illumination. Perceptics USDOT Number Readers have processed millions of images of commercial vehicle 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 Highlights

  • Accuracy of 90% on over 80% of commercial vehicles
  • Can be mounted on the same post as the LPR
  • Accurately reads numbers in multiple fonts, and in different locations and orientations on the vehicle
  • Mainline and ramp applications available
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 easily be upgraded to read hazmat placards


System Components

One ultra high resolution imager:

  • High resolution camera (5MP) with pre-selected and pre-set lens
  • Embedded system and OCR software specific for USDOT Number Reader Systems

Infrared Stroboscopic Illuminator

Post mounting kit & illuminator front panel filter kit

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

Power & I/O

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

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

10/100 Mbps Ethernet port


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):

  • Weigh Station: 11.5' - 22'
  • Mainline: 16.5' - 45'

Lens Options:

  • Weigh Station: 12.5mm - 25mm
  • Mainline: 16mm - 50mm

Vehicle Speed:

  • Weigh Station: up to 45mph
  • Mainline: up to 75mph

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

Light Source: Xenon gas discharge lamp

Illuminator Output: 30 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)