The XP21 Stop Bar Detector: 

• Uses radar to get the most accurate stop bar data for an entire intersection 
• Part of the Expanse system: connect it to an Arc and use the Expanse software to take advantage of all the great features of the system 
• Native IP device: put it on your network and use the software to interact with sensors on your system 
• Field-replaceable surge card means you can easily replace the surge protection in the field after a surge event 
• Employs Wavetronix’ industry leading radar technology for the highest quality high-definition detection
• Features a GPS receiver for georeferencing the sensor 
• All-weather, all-condition performance 
• Built-in heater prevents snow from blinding the sensor

Physical properties 

• Weight: 9.4 lbs (4.26 kg) 
• Dimensions: 12.25 in. (31.1 cm) high × 9 in. (22.86 cm) diameter
• Enclosure:
  • Lexan EXL polycarbonate 
  • Resistant to corrosion, fungus, moisture deterioration, and  ultraviolet rays 
  • Outdoor weatherable: UL 746C 
  • Withstands 5-ft. (1.5-m) drop 
  • Housing withstands wind loads exceeding 120 mph ̀ Watertight by NEMA 250 standard
  • Connector: M12 T-code male connector 
• GPS receiver for georeferencing/locating sensor 

Detection area 

• Detection range: 120 ft. (30.4 m) across intersection ˿ Number of approaches: 4
• Number of lanes: 3 per approach
• Field of view: 230º 
• Any lane spacing is supported 
• Detection over barriers is supported
• Flexible lane configuration support including: 
  • Curved lanes 
  • Islands  
  • Medians 

Measured quantities 

• Real-time presence data across a 120-ft. (30.4-m) range ˿ Maximum number of lanes: 12 
• Maximum number of channels: 12 

Power 

• Power consumption: 15–20 W (without heater) 
• Power consumption: 50 W (with heater) 
• Operating voltage: 37.2–60 VDC 
• Onboard, field-replaceable surge protection 
• Resumes vehicle detection automatically after resumption of power 

Communication 

• Native IP device 
• Ethernet speed: 100 Mbps 
• Comm cable lengths: 
  • Expanse S Cable: 1500 ft. 
  • Expanse Cable: 600 ft. 
• In-field and remote upgradable 
• Fail-safe mode for outputs if communication is lost WX-500-0400 
• Configuration and verification without disrupting detection communications 
• Communicates to cabinet via Ethernet over single twisted pair

Configuration 

• Graphical user interface with traffic pattern display ˿ Sensor reconfiguration without detection disruption supported ˿ Supported operating systems: 
  • Windows 7 
  • Windows 8
  • Windows 10 
  • Windows 11 
• Software-supported functionality:
  • TCP/IP connectivity
  • Sensor configuration backup and restore
  • Virtual sensor connections for demonstration and training
  • Sensor configuration backups can be viewed and edited
  • Local or remote sensor firmware upgradability
  • User-selectable stop bar mapping 

Manufacturing 

• Manufactured in the USA
• Surface mount and wave solder assembly
• Operational testing: 
  • Sub-assembly test 
  • 48-hour unit level burn-in
  • Final unit test 
• Unit test results available 
• IPC-A-610C Class 2–compliant

Operating conditions 

• Ambient operating temp: -29.2°F to 165°F (-34°C to 74°C) 
• Humidity: up to 95% RH (non-condensing) 
• Accurate performance in: 
  • Rain up to 1 in. (2.5 cm) per hour 
  • Freezing rain 
  • Dry snowfall and moist snowfall 
  • Wind 
  • Dust 
  • Fog 
  • Changing temperature 
  • Changing lighting (even direct light on sensor at dawn and dusk) 
  • Ice and dry snow buildup up to 0.2 in. (0.5 cm) on sensor front 

Maintenance 

• No cleaning or adjustment necessary 
• No battery replacement necessary 
• No recalibration necessary 
• Mean time between failures: 10 years (estimated based on manufacturing techniques) 

Support 

• Training and tech support available 
• Wavetronix training includes:
  • Knowledgeable trainers offering classroom and in-field instruction 
  • Use of presentation materials 
  • Installation and configuration instruction to ensure accurate performance 
  • Instruction in use of computer and other necessary equipment
  • Virtual configuration 
• Technical support includes: 
  • Technical representatives available for installation and configuration 
  • Ongoing troubleshooting and maintenance support 
• Documentation: 
  • Comprehensive user guide 
  • Quick start guide 
• Documentation available upon request:
  • Certification documentation 

Warranty 

• Two-year warranty against material and workmanship defect