Sensky BS033C Motion Sensor Light Switch, Occupancy Sensor Switch，White (Neutral Wire Required);

As there is a photosensitive internal, switch only allows the light switch to be activated on in dark condition.
So when you test the switch on AUTO function in a very bright environment (Ambient Light: > 5-10LUX) , It won't work ( Even movement sensed).
In this condition, Please do Cover the detection area with your hand for about 30 seconds then test again.

Specification

Input Voltage :110V/AC-240V/AC
Power Frequency :50/60Hz
Detection Range :180 degree
Detection Distance :9m max(less than 24 Celsius)
Ambient Light:Work in LUX less than 20LUX (switch on the Auto position)

Time-Delay

Min :10sec(more or less) Max:30min
Working temperature :20~40 Celsius
Working Humidity : higher than 93% RH

Rated Load :
1200W/220v (incandescent lamp)
300W/220V (energy-saving lamp)
400W/110V (incandescent lamp)
400W/110V (incandescent lamp)
Power Consumption :
0.45W(work)
0.1W (static)

Detection Motion Speed :0.6~1.5m/s
Size :70mm*115mm*35mm
Note
Time -delay is added continually: When it receives the second in induction signals after the first induction, it will compute time once more on the rest of the first time-delay basic (set time).
Currently the temperature becomes lower, the sensitivity of the sensor would become higher, so the probability of false triggering the sensor turning on increases. We recommend to reduce the Lux value appropriately to reduce triggering motion sensor. If the switch works error, please don't worry. Any questions or needs welcome to contact us.
Attention:

1.Don't exposed to direct sun light or lighting, big wind, near a heater or air condition.

2.Don't fix it at a place where there are obstructing material (e.g. Glass, dense clothes) which IR cannot get though.

3.Don't fix it in strong shock or vibration environment.