The light sensor in your device is continually monitored and when the detection level is crossed, the counter is increased by one.

Can be used to count each time a light source shines on the sensor. Or alternatively, shine a light on the sensor and count each time the light beam is broken.

• Illuminance values in lux (lumens per square meter) or foot-candles.

• Detect on rising or falling past the detection level.

• Reduce double counts with optional no-count wait after detection.

• Graph to show illuminance values.

• Counts indicated on graph and with optional 'click' sound.


Light sensors will vary in sampling speed, resolution and accuracy from one device to the next. For indication only.