Infrared Sensor
 |
 Infrared Wireless Home Alarm Sensor Driveway Security Alert Gate Fence Chime $19.95 End Date: Wednesday Feb-8-2012 11:42:06 PST |
 3 Style PIR Infrared IR 6 60 LED Motion Sensor Detector Light Lamp Lighting Bulb $14.58 End Date: Tuesday Feb-14-2012 3:16:25 PST Buy It Now for only: $14.58 |
 Automatic Sensor Infrared Handfree Soap Dispenser Auto $3.98 End Date: Saturday Feb-18-2012 1:11:34 PST Buy It Now for only: $3.98 |
 Home Infrared Security Alarm Remote Motion Sensor IR $15.99 End Date: Wednesday Feb-8-2012 17:54:03 PST Buy It Now for only: $17.99 |
 15LED Super Bright PIR Infrared Auto Sensor Motion Detector Wireless Light White $5.99 End Date: Wednesday Feb-8-2012 23:55:02 PST Buy It Now for only: $5.99 |
 New Samsung Intrusion Alarm Passive Infrared PIR Dome sensor Home security $29.99 End Date: Sunday Feb-19-2012 22:04:46 PST Buy It Now for only: $29.99 |
 Home Infrared Security Alarm Remote Motion Sensor IR $15.99 End Date: Wednesday Feb-8-2012 19:21:05 PST Buy It Now for only: $17.99 |
 Infrared PIR Sensor Alarm Infrare Motion Detector Range 12m DC9V 16V New Homeuse $9.99 End Date: Monday Feb-20-2012 8:49:13 PST Buy It Now for only: $9.99 |
 Auto 15LED PIR Infrared Sensitive Motion Detector Wireless Sensor LED Light Lamp $8.89 End Date: Wednesday Feb-8-2012 20:12:05 PST |
 Infrared PIR Sensor Alarm Infrare Motion Detector New $11.39 End Date: Tuesday Mar-6-2012 2:35:04 PST Buy It Now for only: $11.39 |
 Motion Sensor Alarm Infrared Remote Home Security NEW $9.99 End Date: Saturday Feb-25-2012 22:15:32 PST Buy It Now for only: $9.99 |
 PIR Infrared Auto Sensor LED Light Lamp Motion Detector $0.99 End Date: Wednesday Feb-8-2012 20:18:06 PST |
 110V Infrared Sensor Switch Auto lighting Switch PIR 7M Sensor Motion Detector $13.94 End Date: Tuesday Mar-6-2012 18:43:16 PST Buy It Now for only: $13.94 |
 5 8M E27 85 260V 5W 450LM LED Infrared Motion Sensor Light Bulb Lamp Aluminum $16.77 End Date: Monday Feb-27-2012 17:59:14 PST Buy It Now for only: $16.77 |
 Home Infrared Security Alarm Remote Motion Sensor IR $8.99 End Date: Thursday Feb-9-2012 7:21:04 PST |
 Home Infrared Security Alarm Remote Motion Sensor IR $9.77 End Date: Friday Feb-24-2012 21:34:09 PST Buy It Now for only: $9.77 |
 Auto PIR Infrared Motion Detector Wireless Sensor LED Light Lamp Black White New $8.89 End Date: Thursday Feb-9-2012 18:15:07 PST |
 5W E27 110V Infrared PIR Sensor 39 LED Lamp Light Bulb $10.88 End Date: Friday Feb-10-2012 19:12:14 PST Buy It Now for only: $10.88 |
 Driveway Patrol Sensor and Receiver Kit Infrared New $19.95 End Date: Thursday Mar-8-2012 17:05:22 PST Buy It Now for only: $19.95 |
 PIR Infrared Sensitive Motion Detector Wireless Sensor LED Light Lamp Warm White $9.69 End Date: Thursday Feb-9-2012 19:35:07 PST |
 Wall Mount Motion Automatic Infrared Sensor Switch $7.77 End Date: Thursday Mar-8-2012 5:12:49 PST Buy It Now for only: $7.77 |
 White Automatic Sensor Infrared Handfree Soap Cream Dispenser US fast ship $12.88 End Date: Monday Feb-27-2012 23:42:31 PST Buy It Now for only: $12.88 |
 Home Infrared Security Alarm Remote Motion Sensor IR $16.99 End Date: Friday Feb-10-2012 18:36:50 PST Buy It Now for only: $18.99 |
 DC 12V 24V 8A Infrared PIR Motion Sensor Switch for lighting light $9.35 End Date: Tuesday Mar-6-2012 2:32:59 PST Buy It Now for only: $9.35 |
 Home Infrared Security Alarm Remote Motion Sensor IR $15.99 End Date: Friday Feb-10-2012 20:49:03 PST Buy It Now for only: $17.99 |
 DC 9 16V PIR Infrared Sensor Alarm Motion Detector Wht $9.87 End Date: Thursday Mar-8-2012 3:21:54 PST Buy It Now for only: $9.87 |
 E27 IR Infrared Motion Sensor 23 LED Light Bulb Lamp 5m $1.00 End Date: Saturday Mar-3-2012 0:23:42 PST Buy It Now for only: $1.00 |
 Home Infrared Security Alarm Remote Motion Sensor IR $15.99 End Date: Friday Feb-10-2012 22:13:34 PST Buy It Now for only: $17.99 |
 New Infrared Touchless Automatic Motion Sensor Lid Open Trash Can 132 Gallon $68.99 End Date: Wednesday Feb-8-2012 20:32:53 PST Buy It Now for only: $68.99 |
 Motion Sensor Home Security Alarm IR Infrared Remote $8.99 End Date: Wednesday Mar-7-2012 0:52:10 PST Buy It Now for only: $8.99 |
 Home Infrared Security Alarm Remote Motion Sensor IR $16.99 End Date: Friday Feb-10-2012 23:44:02 PST Buy It Now for only: $18.99 |
 Automatic Sensor Infrared Handfree Soap Sanitizer Dispenser Touchless Bathroom $60.63 End Date: Tuesday Feb-28-2012 22:15:20 PST Buy It Now for only: $60.63 |
 2 Wireless Pet Immune Infrared Motion Sensor GE 60 807 95R NX 481 Simon XT $52.00 (2 Bids) End Date: Saturday Feb-11-2012 16:33:55 PST |
 Infrared Security Sensor Celling Curtain PIR Detector $5.93 End Date: Friday Feb-10-2012 14:36:26 PST Buy It Now for only: $5.93 |
 E27 PIR Infrared Motion Sensor 23 LED Light Bulb Lamp $1.00 End Date: Thursday Feb-9-2012 16:56:04 PST Buy It Now for only: $1.00 |
 Napco pir700 passive infrared motion detector sensornew in box NO reserve $9.99 End Date: Sunday Feb-12-2012 9:22:31 PST Buy It Now for only: $25.00 |
 DC 12V T28AD Automatic IR Infrared Sensor Motion Detector Lamp Light Switch PIR $10.59 End Date: Sunday Mar-4-2012 2:17:57 PST Buy It Now for only: $10.59 |
 15 LED Infrared Sensor Motion Detector Security Night Light Lamp Hallway 3M 20s $1.00 End Date: Wednesday Feb-8-2012 23:50:06 PST Buy It Now for only: $1.00 |
 Home Infrared Security Alarm Remote Motion Sensor IR $15.99 End Date: Sunday Feb-12-2012 14:21:57 PST Buy It Now for only: $17.99 |
 E27 PIR Infrared Motion Sensor 23 LED Light Bulb Lamp $6.49 End Date: Thursday Mar-8-2012 21:56:44 PST Buy It Now for only: $6.49 |
 Passive Infrared Sensor Alarm by Radio Shack $10.00 End Date: Sunday Feb-12-2012 16:20:20 PST |
 Pyroelectric Infrared PIR Motion Sensor Detector Module $4.80 End Date: Friday Mar-2-2012 22:46:12 PST Buy It Now for only: $4.80 |
 5 8M E27 85 260V 5W 450LM LED Infrared Motion Sensor Light Bulb Lamp Bright Soft $15.19 End Date: Friday Feb-17-2012 21:38:13 PST Buy It Now for only: $15.19 |
 Honeywell 5890pi passive infrared detector transmitter used in office 2 sensor $20.00 End Date: Monday Feb-13-2012 10:18:37 PST |
 Infrared IR Motion Sensor Automatic Lighting Lamp Light Control Switch White $7.27 End Date: Thursday Feb-23-2012 0:52:38 PST Buy It Now for only: $7.27 |
 Auto PIR Infrared Motion Detector Wireless Sensor LED Light Lamp For Cigar Box $9.89 End Date: Tuesday Mar-6-2012 18:59:20 PST Buy It Now for only: $9.89 |
 Lot of 12 Single Dual Passive Infrared Motion Detector Sensor Security Alarm $19.99 (1 Bid) End Date: Monday Feb-13-2012 11:14:21 PST |
 E27 PIR Infrared Motion Sensor 54 LED White Light Bulb Lamp 3W $5.79 End Date: Sunday Mar-4-2012 16:55:39 PST Buy It Now for only: $5.79 |
 Honeywell IS 215T IntelliSense Passive Infrared Motoin Sensor NIB w instructions $7.95 End Date: Tuesday Feb-14-2012 10:45:14 PST |
 E27 60 LED IR Infrared Motion Sensor Lamp AC 220V White Light Bulb 3W Lighting $14.58 End Date: Tuesday Feb-14-2012 0:44:35 PST Buy It Now for only: $14.58 |
 Automatic Sensor Infrared Handfree Soap Dispenser H938 $16.96 End Date: Friday Mar-2-2012 23:16:07 PST Buy It Now for only: $16.96 |
 GE SECURITY PASSIVE INFRARED SENSOR PI6000 4D SIGNAL PROCESSING NEW IN BOX $0.99 End Date: Tuesday Feb-14-2012 10:48:41 PST |
 2pcs Infrared IR Motion Sensor Automatic Light Switch Saving Energy AC 220V 60Hz $13.99 End Date: Saturday Feb-18-2012 20:31:18 PST Buy It Now for only: $13.99 |
 Nine Stars Sensor Infrared Lid Gallon 21 Stainless Steel Trash Can DZT804 Oval $84.95 End Date: Saturday Feb-11-2012 7:08:02 PST Buy It Now for only: $84.95 |
 Automatic Sensor Infrared Handfree Soap Cream Dispenser $0.01 End Date: Wednesday Feb-8-2012 2:02:40 PST |
 3PCS Wireless Motion Sensor Remote Alarm Infrared Detector Home Security System $29.88 End Date: Wednesday Mar-7-2012 1:04:40 PST Buy It Now for only: $29.88 |
 NEW Eye Vac EVPRO Professional Touchless Stationary Vacuum w Infrared sensors $99.99 End Date: Wednesday Feb-8-2012 4:27:07 PST Buy It Now for only: $149.99 |
 Wireless PIR Motion Sensor Passive Infrared Detector 433mhz $8.00 End Date: Saturday Mar-3-2012 21:15:48 PST Buy It Now for only: $8.00 |
 E27 Infrared Motion Sensor 54 LED White Light Bulb Lamp Energy Saving $5.79 End Date: Thursday Mar-1-2012 21:54:12 PST Buy It Now for only: $5.79 |
 110V Infrared Chip Automatic Hands Free Sensor Faucet Tap Sink Electronic Touch $53.95 End Date: Wednesday Feb-8-2012 9:17:23 PST Buy It Now for only: $59.95 |
 2Pcs Ceiling Wall Motion Automatic Infrared IR Sensor Light Switch 3W to 200W $15.12 End Date: Friday Feb-17-2012 13:43:12 PST Buy It Now for only: $15.12 |
 6 LED Infrared PIR Sensor Light Lamp Motion Detector $5.22 End Date: Sunday Feb-26-2012 17:00:47 PST Buy It Now for only: $5.22 |
 2 DRIVEWAY PATROL Wireless MOTION SENSOR DETECTOR ALARM Infrared ALERT SYSTEM $31.99 End Date: Wednesday Feb-8-2012 11:38:32 PST Buy It Now for only: $35.19 |
 5W 220V Infrared PIR Sensor 39 LED Lamp Light Bulb E27 $11.88 End Date: Wednesday Feb-22-2012 15:54:39 PST Buy It Now for only: $11.88 |
 EZ Faucet Infrared Sensor Faucet Adaptor as seen on tv EZF001C $8.00 End Date: Wednesday Feb-8-2012 11:38:51 PST Buy It Now for only: $14.00 |
 Infrared PIR Motion sensor module for Arduino ARM MCU $5.80 End Date: Wednesday Mar-7-2012 18:12:33 PST Buy It Now for only: $5.80 |
 Infrared Motion Sensor Automatic Light Holder Switch $7.65 End Date: Friday Mar-2-2012 23:27:28 PST Buy It Now for only: $7.65 |
 Motion Detector Sensor Alarm Infrared Remote Home Security System Wireless PIR $8.99 End Date: Wednesday Feb-8-2012 16:00:38 PST |
 110V Infrared Sensor Switch Auto lighting control PIR Sensor Motion Detect $13.99 End Date: Monday Feb-20-2012 0:53:26 PST Buy It Now for only: $13.99 |
 E27 39 LED IR far infrared Motion Sensor Lamp 220V White Light Bulb 5W Lighting $14.59 End Date: Thursday Mar-1-2012 2:12:27 PST Buy It Now for only: $14.59 |
 Motion Detector Sensor Alarm Infrared Remote Home Security System Wireless PIR $8.99 End Date: Wednesday Feb-8-2012 17:00:48 PST |
 110V Infrared Sensor Switch Auto lighting Switch PIR Sensor Motion Detect $13.96 End Date: Monday Feb-20-2012 0:53:22 PST Buy It Now for only: $13.96 |
 2X E27 23LED Far infrared sensor lamp Bulb 220V Se220 U $0.86 End Date: Wednesday Feb-8-2012 17:04:00 PST |
 iTOUCHLESS SENSOR TOUCH FREE INFRARED AUTOMATIC STAINLESS TRASH CAN 13 GALLON $69.99 End Date: Sunday Feb-26-2012 14:39:02 PST Buy It Now for only: $69.99 |
 E27 3W 24 LED Infrared IR Sensor Bulb Light Lamp 220V $8.58 End Date: Wednesday Feb-15-2012 0:32:45 PST Buy It Now for only: $8.58 |
 Motion Detector Sensor Alarm Infrared Remote Home Security System Wireless PIR $8.99 End Date: Wednesday Feb-8-2012 18:01:12 PST |
 Infrared PIR Sensor Alarm Motion Detector Optional NC NO alarm output DC9V 16V $9.99 End Date: Wednesday Feb-22-2012 7:45:52 PST Buy It Now for only: $9.99 |
 E27 54 LED PIR Occupancy Sensor White Light Bulb Motion 3W AC85 260V Infrared $12.06 End Date: Tuesday Feb-21-2012 17:57:25 PST Buy It Now for only: $12.06 |
 Motion Detector Sensor Alarm Infrared Remote Home Security System Wireless PIR $8.99 End Date: Wednesday Feb-8-2012 19:01:08 PST |
 E27 IR Infrared Motion Sensor 23 LED Light Bulb Lamp 5m $1.00 End Date: Sunday Feb-26-2012 22:16:54 PST Buy It Now for only: $1.00 |
 Motion Detector Sensor Alarm Infrared Remote Home Security System Wireless PIR $8.99 End Date: Wednesday Feb-8-2012 20:01:11 PST |
 E27 IR Infrared Motion Sensor 6 LED Light Bulb Lamp 6W $13.99 End Date: Monday Feb-13-2012 15:25:33 PST Buy It Now for only: $13.99 |
 12V 24V 8A PIR Infrared Motion Sensor Switch For Lighting Light New DC $9.45 End Date: Sunday Feb-12-2012 7:27:42 PST Buy It Now for only: $9.45 |
 HUBBELL BRYANT INFRARED WALL SWITCH SENSOR WALLPLATE IV $9.99 End Date: Wednesday Feb-8-2012 20:35:29 PST |
 Home Security Motion Sensor Alarm Infrared Remote $9.88 End Date: Tuesday Feb-21-2012 19:02:41 PST Buy It Now for only: $9.88 |
Is there a sensor that detects LED or laser light?
I am looking for a sensor that can detect LED or laser light. I am guessing it would be an infrared sensor, but im not sure what type it would be because I want the sensor to measure how far away the LED or laser light is from the sensor. I also would like it to be able to distinguish between more than one wavelength and calculate the distance of each. Is there any sensor out there that can do that?
Yes and no. Light detectors exist. And, of course, they have existed for millions of years. There are many examples in biology, but I'll just mention one, the eye. Or how about photographic film? I'm guessing that is not what you want. You probably want some sort of electronic device. Many types of these also exist. There are things like photo-sensitive resistors, as mentioned by another answerer. There are CCD devices used in digital cameras. There are photomultipliers. But most 'laser detecting' is done with a photodiode, which is an inexpensive little device that can range anywhere from 1000's of dollars to 10's of cents, depending on it's characteristics. However, to use one, you either need to buy it in a pre-configured electronics board, or you need to have the electronics skills to build your own. So, sensing light is the easy part.
But you want something that can tell distance. Of course, there are things that do this, as well. But here's the problem. This is a complicated problem that requires a sophisticated solution. How the sensor works will depend on exactly what signal it is getting. You could certainly not simply shine any old laser onto it and expect it to know how far away that laser is. You could come up with your own solution that is tailored to your specific laser, which would take months if not years of effort. But then it would not work for a different laser or a different setup. So there is no device that can be used to tell the distance of an arbitrary light source. Most devices will come with a specific light source that it is intended to be used with (like the detectors in DVD players or laser range finder) and that light source will need to be used in a specific way. This is kind of like asking for a device that makes food. There are plenty of devices that make food, but not necessarily a device that will make the food you currently want.
As far as distinguishing wavelengths, there are also many ways to do this. Most light detectors will only work for a range of wavelengths. So if you try light outside of that wavelength, it will not be detected. On the other hand, all light within that range can not be distinguished from other wavelengths in that band. The way you distinguish wavelengths is you get two detectors, one that works at one wave length and another that works at the other wave length. Then you can tell which wave length range the light is in. That's how cameras, film, eyes, and almost all color-sensitive detectors work.
To conclude, you will not find a pre-assembled device that does what you want for an arbitrary light source. I'm sure something exists for specific light sources, though I'm also sure those devices would be expensive. And the components all exist, so, if you are ingenious enough to make your own device out of those components, it certainly is possible (though it will take a lot of effort). And let me close by saying that I have overlooked one obvious device that does everything you want: the human eye. It can tell distance and color pretty well. Of course, if you think about how complicated the human eye is along with how complicated the processing is that takes place in the brain to do all these tasks, then you get an idea of how complicated the problem is that you are asking for. And remember, the human eye has had millions of years of evolution to get to where it is now.
