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Stalker Traffic Speed Sensor

When the application requires a radar with both moving and stationary capabilities, the Traffic Speed Sensor is the natural choice. Though not intended for use in enforcing speed laws in the U.S., the Traffic Speed Sensor has all the features of a world-class traffic radar built in

Stalker Traffic Control Sensor






Features of the Stalker Traffic Speed Sensor

  • Moving and stationary mode operation
  • Direction sensing (closing/away, opposite/same-lane)
  • Longest range available – up to 2 miles
  • Simultaneous closing/away operation available in stationary mode
  • Strongest and faster target detection in all modes
  • True Doppler audio output
  • Strongest and faster speed locking
  • Tuning fork test mode
  • Transmitter on/off control
  • Speed units selectable: MPH, km/h, nautical miles/hr (knots), feet/sec, meters/sec
  • Unit or tenths resolution selection
  • Adjustable sensitivity, doubling suppression, squelch and audio volume
  • RS-232 serial interface supporting baud rates up to 38400
  • Selectable output protocols and data formats

Traffic Speed Sensor Applications

While the Traffic Speed Sensor has features that are normally seen in law enforcement Traffic Radar, such as speed locking and Doppler audio output, it is the perfect speed sensor for any application requiring monitoring road traffic speed or speed management in a mobile environment.

The Stalker Traffic Speed Sensor ...........................

General Specifications


Moving/Stationary Doppler Radar Speed Sensor
Operating Frequency 34.7 GHz (Ka-Band)
Stability +/-100 MHz
Communication Interface RS-232
Power Requirements

Voltage: 9-16 VDC for SN ST6560 and below
9-24 VDC for SN ST6561 and above

Current: (at 12 VDC nominal)
Transmitter on: 370 mA
Transmitter off: 100 mA


Operating: -22° F (-30° C) to +158° F (+70° C) ,
90% relative humidity,
Non-operating: -40° F (-40° C) to +185° F (+85° C)

Mechanical Weight:  1.15 lb. (0.52 kg)
Diameter:  2.6 in. (6.7 cm)
Length: 4.7 in. (11.8 cm)
Case Material: Aluminum Die Cast
Accuracy +1, -2 MPH stationary, +2, -3 MPH moving
+1, -2 KPH stationary, +2, -3 KPH moving
Audio Output A 3.3 Vpp pulse-width modulated (PWM) audio output signal is provided - must be filtered and amplified for best audio quality.
Auto Self-Test Performed every 10 minutes while transmitting
Speed Range

Stationary low speed threshold configurable:
1 MPH to 200 MPH (1.6 to 321 KM/H)
12 MPH to 200 MPH (19 to 321 KM/H)

Moving Speed Range

Patrol speed –
Low patrol acquisition threshold configurable:
Standard acquisition of 1 to 90 MPH (8 to 144 KPH), when Patrol Lo Cutoff = Low

Optional acquisition of 20 to 90 MPH (32 to 144 KPH), when Patrol Lo Cutoff = High

Patrol speed, once acquired, will track to 199 MPH (320 KPH)

Opposite lane target speed - 200 MPH Max combined closing speed (321 KPH)
For 5 MPH (8 KPH) patrol speed: 20 MPH to 195 MPH (32 to 313 KPH)
For 70 MPH (112 KPH) patrol speed: 35 MPH to 130 MPH (56 to 209 KPH)

Same lane target speed – Related to patrol speed:
±70% of patrol speed within 5 MPH (8 KPH) of patrol speed
i.e. For 50 MPH: 16→45 MPH and 55→85 MPH
( For 80 KPH: 25→72 KPH and 88→136 KPH) Same lane patrol speed must be greater than 16 MPH (25 KPH).

Microwave Specifications:

Antenna Conical horn
Polarization Circular
3DB Beamwidth 12° +/- 1°
RF Source Gunn-Effect diode
Receiver Type Two Direct-Conversion Homodyne receivers using four low-noise Schottky battier mixer diodes
Power Output

10 mW minimum
15 mW nominal
25 mW maximum

Power Density 1 mW/cm2 maximum at 5 cm from lens

Control and Configuration Settings

Basic Configuration Transmitter Control
Unit of Measure
Unit Resolution
Faster Target Tracking
AUX Pin Configuration
Serial Port Configuration Baud Rate
Output Format
Leading Zero Character
Message Period
Target Recognition Opposite Lane/Stationary Sensitivity
Same Lane Sensitivity
Fine Sensitivity Adjust
Patrol Speed Blank
Target Filtering Stationary Low Cutoff
Patrol Speed Low Cutoff
Double Suppression
Max AGC Gain
Min AGC Gain
Current AGC Gain
Speed Presentation Holdover Delay
Locking Targets Lock Option
Faster Locking Enable
Strongest Lock
Fast Lock
Patrol Speed Blank
Speed Alarm Alarm Speed Threshold
Audio Doppler Audio Volume
Aud 0 Enable
Variable Doppler Loudness
Beep Volume
Testing Fork Enable
Auto Test Period
Auto Test Mode
Enhanced Test
System Get Product ID
Get Product Type
Get Software Version


Traffic Speed Sensor Downloads

User documentation:
(Left click to view / Right click to download.)

Traffic Speed Sensor Operator Manual.

Traffic Speed Sensor Brochure.

Traffic Speed Sensor Technical Specifications.

Traffic Speed Sensor Certificate of Accuracy.

Developers kit:

Developers Kit for Stationary Speed Sensor.

Configuration files:

Traffic 232 v2.0.0 configuration file.

Traffic 232 v3.0.0 configuration file. (Beginning with Serial Numbers ST009700 and newer)
Note: New software is not backward compatible with older hardware.

Traffic 232 v3.1.0 configuration file.

Programming files:

Traffic 232 v2.0.0 programming file.

Traffic 232 v3.0.0 programming file. (Beginning with Serial Numbers ST009700 and newer)
Note: New software is not backward compatible with older hardware.

Traffic 232 v3.1.0 programming file.

REACT Application Downloads