SS400 OEM Doppler Speed Sensor

Availability: Full Production

Houston Radar's SS400 Doppler sign activation/speed sensor/Doppler Radar is a state of the art milli-power Digital Signal Processing (DSP) based K-band radar for the sign activation and traffic calming markets. It is the premier product in its class available in the world.

  • World's smallest and lowest power usage OEM K-Band Doppler radar at 0.10 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
  • 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 (4.5x4.8x2.4 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
  • Best in class "Advanced In-Radar" traffic statistics option available
  • True Average Speed feature built-in for very low cost, easy to deploy, average traffic speed measurements on the road
  • IO expansion board w/ DB9 connector, rotary s/w and isolated high power output available

Specifications & Recommended Operating Conditions

VCC 5.0V to 18VDC (21V max)
ICC@12VDC 9 mA (0.1 Watts)
Radar RF out 5 mW maximum
Radar fcenter 24.125GHz or 24.200 GHz
Operating °F (°C) -40 (-40) min to 185 (85) max
Pickup Distance 300+ feet (90+ m) in most cases
Beam Angle 38°x45°
Beam Polarization Linear
Lamp 1 & 2 out 135 mA max each up to 28VDC
Lamp dimming 240 Hz PWM from 5 to 100 %
LDR light input 0 to 3.3V input
CE Mark Yes
Dimensions Open frame 1.75Wx1.7Hx0.5D”
(44x42x12 mm)
Boxed 1.9Wx2.1Hx0.9D”
Weight 0.05Kg (0.1 lbs) approx
Optional breakout board
Optional junction box

IO/PWR Connection Details

Molex Pin #
(Triangle on
connector is pin #1)
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
10 RS232 Receive into radar
11 VCC
12 GND

Outline Details (dimensions in mm [inches])