The
Wattstopper FM-105 is
a line-voltage, super high-frequency microwave occupancy sensor that automatically manages lighting loads based on human movement and ambient light levels. Operating on the Doppler principle, it emits low-power electromagnetic waves to monitor shifts in return signals, eliminating the strict line-of-sight requirement common to traditional passive infrared (PIR) alternatives.
Core Functionality
- Doppler Radar Tracking: Emits a 5.8 GHz signal to map space profile changes.
- Material Penetration: Transmits through plastic, glass, polycarbonate, and acrylic diffusers.
- Concealed Installation: Easily installs entirely hidden behind a fixture lens or within non-metallic watertight enclosures.
- Hold-Off Daylighting: Includes a built-in photo sensor to block lights from turning ON when natural daylight suffices.
Technical Specifications
The electrical parameters and performance limits of the hardware include:
| Metric / Parameter | Specification Detail |
|---|
| Input Voltage | 120/277 VAC, 50/60 Hz (No separate power pack needed) |
| Load Ratings | 120 VAC: 0–800W Ballast/Tungsten
277 VAC: 0–1200W Ballast |
| Signal Frequency | 5.8 GHz Super High Frequency (SHF) |
| Power Output / Draw | ~1 mW output; 0.5W power consumption at 120VAC |
| Coverage Radius | Adjustable up to 20 feet (6.1 meters) |
| Adjustable Time Delay | 10 seconds to 30 minutes |
| Light Level Threshold | 2 to 200 foot-candles (fc) |
| Operating Envelope | -4°F to 131°F (-20°C to 55°C); 5% to 95% non-condensing RH |
| Dimensions & Material | 3.13" L x 2.13" W x 1.63" H; White plastic housing |
Physical Adjustment & Customization
Configuring parameters is handled via manual trimpots directly on the device enclosure:
- Sensitivity Setting: Scales down the detection zone to fit small rooms or expands to its full 20-foot limit.
- Time Delay: Governs how long lights remain illuminated after the last registered movement.
- Daylighting Setpoint: Modifies the foot-candle limit for the hold-off logic.
- Directional Shading: Packaged with two metal shielding flags to block signal transmission toward hallways or interference zones.
Common Applications
Due to its ability to survive enclosed environments and read through barriers, it is used across industrial and commercial spaces:
- Stairwells & Hallways: Activates lighting sectors ahead of approaching pedestrian cross-traffic.
- Outdoor Enclosed Luminaires: Concealed inside damp-rated or wet-location wall packs and pedestrian sconces.
- Vandal-Prone Areas: Installed completely hidden inside structural light fixtures to safeguard the electronic sensors from tampering.
- Regulatory Compliance: Satisfies structural energy codes, meeting UL, cUL, FCC, and RoHS baseline standards.
Warranty:
We offer
a NO-DOA guarantee within eBay's return policy timeframe, allowing you to test
and inspect the item to 100% satisfaction.
- We power items
up (if applicable) and test for basic functionality.
- We do not
extensively test most items.
- This item may or may not be in original packaging.
Condition:
* New, Old Stock in OEM Packaging. As Pictured.
* An item in excellent condition with no functional
defects. The item may be missing original packaging and may have been used for
testing or demo purposes.
* Be aware that due to the multiple quantities available, you
may not receive the item pictured in the ad above.
* The box or item might show signs of
wear due to shelf wear, etc.
* Please refer to the pictures for a clear view of the item.
** ITEM
SHIPS AS SHOWN IN THE PHOTO.
* IF
YOU'RE SATISFIED WITH OUR SERVICE, PLEASE ADD US TO YOUR LIST OF FAVORITE
SELLERS AND COME BACK AGAIN!