Houston Radar’s SS300U Ultra Low Speed Doppler sensor/Doppler Radar is a state of the art milli-power Digital Signal Processing (DSP) based K-band radar for non-contact speed measurements and other industrial and security applications requiring high resolution short to long range speed measurement or motion sensing. It is the premier product in its class available in the world.

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World’s smallest and lowest power usage OEM K-Band Ultra low speed Doppler radar at 0.1 Watts, 6X lower than our DR500S radar and up to 25X lower than some other industry offerings
300+ feet (90+m) typical pickup range for a compact vehicle or other large object
Measure speeds down to 0.2mph (0.3kph) and up to 16mph (26kph)
High resolution ASCII speed output with 3 places of decimal (0.001mph internal resolution)
Support for mph, kph, fps and mps speed units
FCC pre-approved with CE mark
Fully configurable via RS232 serial port for all settings
Simple rotary switch or thumbwheel input possible to set threshold
Wide input operating range allows solar operation
1.75Wx1.65Hx0.5D in (44x42x12 mm) open frame ultra-thin profile
1.9Wx2.1Hx0.9D in (4.5×4.8×2.4 cm) weatherproof enclosure option
Firmware “boot loader” allows for field upgrading of firmware
Two LED Lamp outputs to drive 1.8W LED lamps with dimming
One photo sensor input to sense ambient light to dim LED lamps
100% self-test feature built-in including self power usage
IO expansion board w/ DB9 connector, rotary s/w and isolated high power output available

Note: Pickup range will vary with target, installation and road conditions. Range listed is typical on open road with radar mounted 5 feet above ground.

VCC 6 to 18VDC (21V max)
ICC@12VDC 9 m (0.1 Watts)
Radar RF out 5 mW maximum
Radar Fcenter 24.125GHz or 24.2 available
Operating °F (°C) -4 (-40) min to 185 (85) max
Pickup Distance 300+ feet (90+ m) in most cases
Speed Range 0.2mph (0.3kph) to 16.2mph (26.07 kph)
Internal Resolution 0.001mph maximum
Beam Angle 38°x45°
Beam Polarization Linear
Lamp 1 & 2 out 135 mA max each up to 60VDC
Lamp dimming 240 Hz PWM from 5 to 100%
LDR light input 0 to 3.3V input
CE Mark Yes
Dimensions Open frame 1.75W x 1.7H x 0.5D” (44x42x12 mm)
Boxed 1.9W x 2.1H x 0.9D” (4.5×4.8×2.4cm)
Weight 0.05kgs (0.1lbs)
Optional breakout board
Optional junction box

10.RS232 Receive from radar

Pin # Function
1. GND
2. Do not connect.
3. Reserved. Do not connect.
4. Reserved. Do not connect.
5. Reserved. Do not connect.
6. Reserved. Do not connect.
7. Trigger “open drain” output #1
8. Trigger “open drain” output #2
9. RS232 Transmit from radar
11. VCC
12. GND