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.
SS400 Open Frame
SS400 Weather Proof
- World’s smallest and lowest power usage OEM K-Band Doppler radar at 0.05 Watts, 12X lower than our DR500S radar and up to 50X lower than some other industry offerings
- 300+ feet (90+m) typical pickup range for a compact vehicle
- Advanced rain rejection algorithm rejects over 95% of rain pickup1
- Ground speed tracking and measurement mode
- 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
- 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
1Compared to previous generation and regular Doppler radars.
| Title | Description | Download |
|---|---|---|
| SS400-Short-Form-Data-Sheet | DownloadPreview | |
| SS400-User-Manual-Rev5 | DownloadPreview | |
| Android App - Download from Google Play Store | Download from Google Play Store | Download |
| Houston Radar’s Advanced In-Radar Statistics Package | DownloadPreview | |
| Houston Radar Stats Analyzer Installer | Download |
Specification | Recommended Condition |
Vcc | 6.0V to 18VDC |
Icc@12VDC | 4.5 mA (0.054 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 |
SS400 Speed Measurement Range | 0.66mph to 220 mph (1.06km/h to 354 kph) |
SS400U Speed Measurement Range | 0.16mph to 55mph (0.25 km/h to 88 km/h) |
Beam Angle | 38°x45° |
Beam Polarization | Linear |
Lamp 1 & 2 out | 135 mA max each up to 60VDC |
Lamp dimming | 180 Hz PWM from 5 to 100 % |
LDR light input | 0 to 3.3V input |
FCC ID | TIASS400 |
CE Mark | Yes |
Dimensions | Open frame 1.75Wx1.7Hx0.5D” |
Boxed | |
Weight | 0.05Kg (0.1 lbs) approx |
Pin # | Function |
1 (Triangle Mark) | 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 |
10 | RS232 Receive into radar |
11 | VCC |
12 | GND |
Part # | Image | Accessory | Description |
 | Added Cable* | Added cable for weatherproof radars past the standard 2 feet | |
JBX |  | Junction Box* | Junction Box |
Stat/Alc | Advanced In-Radar Statistics for Data Logging | ||
SS300 IO Board |  | SS400 Radar Input/Output Connector Interface board w/ DB9 connector, speed threshold s/w and sensitivity setting | |
PD300 IO Board |  | PD300/SS400 Radar Input/Output Connector Interface board w/ DB9 connector. No Mosfet or rotary switch. | |
900-0017 |  | SS400 Open Frame Interface Cable | SS400 open frame interface cable with female Molex connector to female DB9 |
900-0021 |  | SS400 Weatherproof Interface Cable | SS400 weatherproof interface cable with male Molex connector to DB9 |
USB-RS-P1 |  | USB Power Dongle | USB power supply and PC COM port serial interface for Houston Radar sensors |
120-0010 |  Front View  Back View | Tuning Fork | 3310Hz 46MPH Radar frequency check tuning fork |
BT-RS-P1-E-DTE |  | External Antenna Bluetooth | Class 1 long range Bluetooth module with male DB9 and external antenna in DTE configuration |
900-0014 |  | SS400 Open Frame DB9 Cable | SS300 Open frame 12 core 2feet (0.5m) 1:1 cable with female Molex connector on both ends. |