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Flash v1.4 $12.22US
2 - 6 : $11.60US ( save 5% )
7 - 19 : $11.00US ( save 10% )
20 + : $9.77US ( save 20% )
excl. sales tax

Detects rapid light changes or light flashes. Check the Light sensor for a wider field of view and larger illuminance detection range.

Application examples

  • Use for light source intensity measurement, map to a continuous controller and sweep your filters.
  • Use with SeeLaser-Red (red beam), SeeLaser-IR (invisible beam) or any of our SeeLaser products or SeeIR (invisible beam, but for a distance less than 1 m) to create a break-beam that triggers when you cross it. Laserharp anyone ? Create a virtual cage for dancers. Or detect intruder, visitor, dog, cat, mouse .... movements.

Other human, animal and object sensors

We offer a number of sensors to detect motion and/or presence and/or proximity of humans, animals and objects in a space:

  • For a motion sensor with variety of sensitivity and output configuration options, view the MoveOn v1.8.
  • If you need a motion sensor of which the output changes each time any motion is detected so that it can be smoothed to give a signal that roughly represents the amount of activity, checkout the MoveOn v1.4.
  • A smaller version which output stays high while motion is detected and during a fixed length of time afterwards, try the MoveMiniOn.
  • Want to detect motion through walls ? See the MoveThruOn.
  • Need to detect presence as well as body temperature ? Try the HotSpot2D.
  • The Advance-645 detects the distance of a person in a 50° cone.
  • Need pin-point distance detection ? The ReachFar and its digital, laser-accurate cousin ReachFarD detect distance up to 4 m within a cone of a few degrees. The ReachClose and its digital, laser-accurate cousin ReachCloseD do the same but up to 2 m.
  • Setup perimeters with break-beams made from a SeeLaser-Red or the invisible SeeLaser-IR (or any of our SeeLaser products) and a Flash, FlashOn or FlashDark.
  • Place TapTile, TapMatOn or TapStripOn sensors on the floor or stairs to detect a person stepping or standing on it, and even get a measure of the exerted force.
  • To know exactly who is present, use the ReachID and let each visitor be detected through their RFID tag.

Technical specifications

Product Flash sensor
Version 1.4 (June 2017)
Sensing parameter visible brightness, illuminance
Sensing method phototransistor
Active volume 20 ° cone
Spectral response range 400 to 1100 nm (900 nm peak), ie. ultra-violet to infra-red
Illuminance range ? Lux (? mW/cm2)
Response time 0.015 ms
Operating temperature -40 to 100 °C (-40 to 212 °F)
Power supply 1 to 10 V DC, 20 µA at 5 V
Dimensions 13 x 11 x 8 mm (0.51 x 0.43 x 0.3 inch)
Mounting one 2.8 mm (0.11 inch) mounting hole
Cable 1.0 m (39 inch), shielded, red wire = power, black wire = ground, white wire = sensor output, extendable at least 100 m (328 ft) with ExtendCableD-10
Connector male 1x4 plug with a row of 3 pins spaced 2.54 mm (0.100 inch)
Weight 15 g (0.5 oz), incl. cable
Software support

  1. Our SensePlay software is a very easy way to quickly map sensor data to (sequences of) sounds, images and videos using a drag & drop user interface.
  2. Our EditorX software allows you to configure the digitizer to process and map the sensor data of multiple sensors simultaneously.
  3. Our Link software allows you to receive the sensor data from the digitizer and use your computer to view, calibrate, record, process and map the sensor data of multiple sensors simultaneously.
  4. Our SensorX software allows you to receive the sensor data from the digitizer and use your computer to view, calibrate, record, process and map the data of a single sensor.

Application notes When using the sensor for detection of point light sources and proximity detection, remember that ambient light needs to be regulated so as not to interfere with the desired operation.

This page was updated on Saturday 05 February 2022.
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