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Stalker Speedometer Speed Sensor

If the application is in motion, the Speedometer Speed Sensor (radar) fits the assignment. Think of it as a Radar Speedometer and more. For example, since it’s direction sensing it can measure speed in both directions. Use it anywhere the object that it’s mounted on is in motion.

Features of the Stalker Speedometer Speed Sensor

Stalker Speedometer Speed Sensor application

General Specifications


Moving Doppler Speed Sensor

Operating Frequency

34.7 GHz (Ka-Band)


+/-100 MHz

Communication Interface

RS-232 or RS-485 available as separate models

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: -30° to +70°C, 90% relative humidity

Non-operating: -40°C to +85°C


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


+/- 0.3% - Speeds are rounded down to the nearest unit or tenths of a unit depending on the unit resolution setting

Auto Self-Test

Performed every 10 minutes while transmitting

Ground Speed Range

Low ground speed acquisition threshold configurable:

Standard acquisition of <1 to 90 MPH (<1.6 to 144 KPH), when Ground Speed Lo Cutoff = Low

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

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

Microwave Specifications


Conical horn



3DB Beamwidth

12° +/-

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

Serial Port Configuration

Baud Rate

Output Format

Leading Zero Character

Message Period

Target Recognition

Ground Speed Sensitivity

Patrol Speed Blank

Target Filtering

Patrol Speed Cutoff

Max AGC Gain

Min AGC Gain

Current AGC Gain


Fork Enable



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