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$171.42
$342.92
Single Story Home Security System | Intrusion Protection With Motion And Entry Sensors | Official Simplisafe
SimpliSafe, Inc.
Free shipping
50% off
$171.42
$342.92
Single Story Home Security System | Intrusion Protection With Motion And Entry Sensors | Official Simplisafe
SimpliSafe, Inc.
Free shipping
$20.99
AMHEY Motion Sensor Door Chime, Wireless Motion Detector Alarm Indoor, Business Entry Alert Bell With Buzzer, Doorbell For Home/Garage Door/Store, USB
Amazon.com
129
$20.99
AMHEY Motion Sensor Door Chime, Wireless Motion Detector Alarm Indoor, Business Entry Alert Bell With Buzzer, Doorbell For Home/Garage Door/Store, USB
Amazon.com
129
$47.95
Seco-Larm E-931-S35RRQ Enforcer Indoor/Outdoor Wall Mounted Photoelectric Beam Sensor With 35 Foot Range
Amazon.com
823
Free shipping
$47.95
Seco-Larm E-931-S35RRQ Enforcer Indoor/Outdoor Wall Mounted Photoelectric Beam Sensor With 35 Foot Range
Amazon.com
823
$619.00
FALCON BEA DOOR SENSORS & SECURITY - Sensors & Switches & Sensor Module/Housing Supplies
Radwell.com
$619.00
FALCON BEA DOOR SENSORS & SECURITY - Sensors & Switches & Sensor Module/Housing Supplies
Radwell.com
$386.14
Security Door Controls Infrared Motion Sensor: 1 3/4 in Ht, 7 in Wd Model: MD-31DOW
Grainger
$386.14
Security Door Controls Infrared Motion Sensor: 1 3/4 in Ht, 7 in Wd Model: MD-31DOW
Grainger
$99.99
Ring Alarm Contact Sensor 6-Pack - 2nd Gen | Monitor 6 Doors Or Windows | Instant Alerts | Approximately 3-Year Battery Life | Slim Design | Easy
Amazon.com
28K+
Free shipping
$99.99
Ring Alarm Contact Sensor 6-Pack - 2nd Gen | Monitor 6 Doors Or Windows | Instant Alerts | Approximately 3-Year Battery Life | Slim Design | Easy
Amazon.com
28K+
$381.16
Security Door Controls Infrared Motion Sensor: 2 in Ht, 7 in Wd Model: MD-31DB
Grainger
$381.16
Security Door Controls Infrared Motion Sensor: 2 in Ht, 7 in Wd Model: MD-31DB
Grainger
$267.20
$328.65
BEA - 10SSTI - Presence Sensor - Active Infrared Safety Sensor - Horizontal Or Vertical Door Mounted - 12 To 24 VAC/DC
LocksmithKeyless
18% off
$267.20
$328.65
BEA - 10SSTI - Presence Sensor - Active Infrared Safety Sensor - Horizontal Or Vertical Door Mounted - 12 To 24 VAC/DC
LocksmithKeyless
$26.99
MOBI Smart Wi-Fi Door & Window Sensor Real-Time Alerts, App Control, Easy Install - 2Pk
Target
Free shipping
$26.99
MOBI Smart Wi-Fi Door & Window Sensor Real-Time Alerts, App Control, Easy Install - 2Pk
Target
Free shipping
$197.00
Detex Eax-300 | Door Propped Alarm | Exit Devices, Alarms & Panic Bars
Qualified Hardware
Free shipping
$197.00
Detex Eax-300 | Door Propped Alarm | Exit Devices, Alarms & Panic Bars
Qualified Hardware
Free shipping
$490.35
EAGLE1HM BEA DOOR SENSORS & SECURITY - Sensors & Switches & Photoelectric Supplies
Radwell.com
$490.35
EAGLE1HM BEA DOOR SENSORS & SECURITY - Sensors & Switches & Photoelectric Supplies
Radwell.com
$598.83
$658.71
BEA Superscan III 10SSTIII - Infrared Door Sensor
Action Direct
$598.83
$658.71
BEA Superscan III 10SSTIII - Infrared Door Sensor
Action Direct
$179.97
$359.94
2In1 Automatic Door Sensor, Dual Infrared & Radar Safety Sensor For Door Opener Systems, Multipurpose Use - Silver | On Spot Shop
Inspire Uplift
Free shipping
50% off
$179.97
$359.94
2In1 Automatic Door Sensor, Dual Infrared & Radar Safety Sensor For Door Opener Systems, Multipurpose Use - Silver | On Spot Shop
Inspire Uplift
Free shipping
$179.97
$359.94
2In1 Automatic Door Sensor, Dual Infrared & Radar Safety Sensor For Door Opener Systems, Multipurpose Use - Black | On Spot Shop
Inspire Uplift
Free shipping
50% off
$179.97
$359.94
2In1 Automatic Door Sensor, Dual Infrared & Radar Safety Sensor For Door Opener Systems, Multipurpose Use - Black | On Spot Shop
Inspire Uplift
Free shipping
$244.99
SECURITY DOOR CONTROLS Infrared Motion Sensor, MD-31DOW
Zoro.com
$244.99
SECURITY DOOR CONTROLS Infrared Motion Sensor, MD-31DOW
Zoro.com
$335.30
10QUADSCANI - Active Infrared Swing Door Safety Sensor. - (BEA Quadscan I)
Automatics & More
$335.30
10QUADSCANI - Active Infrared Swing Door Safety Sensor. - (BEA Quadscan I)
Automatics & More
$9.94
Wireless Infrared Motion Sensor Welcome Alarm Doorbell (White)
bigupgadgets.com
$9.94
Wireless Infrared Motion Sensor Welcome Alarm Doorbell (White)
bigupgadgets.com
$287.00
BEA 10SSTI Active Infrared Safety Sensor Door Mounted Horizontal Or Vertical Mounting 12 To 24 V AC/DC
B and H Depot
$287.00
BEA 10SSTI Active Infrared Safety Sensor Door Mounted Horizontal Or Vertical Mounting 12 To 24 V AC/DC
B and H Depot
$1,097.71
10IXIO-DT1V - Dual Technology Slide Door Motion/Presence Safety Sensor W/CAMERA - (MONITORED) - (BEA)
Automatics & More
$1,097.71
10IXIO-DT1V - Dual Technology Slide Door Motion/Presence Safety Sensor W/CAMERA - (MONITORED) - (BEA)
Automatics & More
$274.43
HR100-CT-BL - Dual Technology Slide Door Motion/Presence Safety Sensor - (HOTRON)
Automatics & More
$274.43
HR100-CT-BL - Dual Technology Slide Door Motion/Presence Safety Sensor - (HOTRON)
Automatics & More
$30.79
$34.21
LED Lighting Accessories - IR Door Sensor Switch For LED Lighting With Dual Head Sensors - T-2HDSS-30W-IR - Task Lighting
www.MyKnobs.com
$30.79
$34.21
LED Lighting Accessories - IR Door Sensor Switch For LED Lighting With Dual Head Sensors - T-2HDSS-30W-IR - Task Lighting
www.MyKnobs.com
$192.99
$385.98
Aqara Smart Door And Window Sensor Wireless Zigbee Security Alarm Compatible With Mi Home And Apple Homekit - Door Sensor 6Pcs | Inspired Finds
Inspire Uplift
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$192.99
$385.98
Aqara Smart Door And Window Sensor Wireless Zigbee Security Alarm Compatible With Mi Home And Apple Homekit - Door Sensor 6Pcs | Inspired Finds
Inspire Uplift
Free shipping
$31.99
ID02 Door Operated Infrared Sensor Switch LED Automatic Controlling
Kings Outdoor Lighting
$31.99
ID02 Door Operated Infrared Sensor Switch LED Automatic Controlling
Kings Outdoor Lighting
$209.99
SECURITY DOOR CONTROLS Infrared Motion Sensor, MD-31DB
Zoro.com
$209.99
SECURITY DOOR CONTROLS Infrared Motion Sensor, MD-31DB
Zoro.com
$95.00
IR Door Sensor, Pair For Infrasolution Smart Access Handles
Server Racks
$95.00
IR Door Sensor, Pair For Infrasolution Smart Access Handles
Server Racks
$249.29
10SSTI SUPERSCAN-T BEA, Door Mounted, Active Infrared Safety Sensor
Buy Door Hardware Now 2.1
$249.29
10SSTI SUPERSCAN-T BEA, Door Mounted, Active Infrared Safety Sensor
Buy Door Hardware Now 2.1
$40.84
Ir Infrared Motion Sensor, Activated Voice Welcome Doorbell, Dingdong
eBay
$40.84
Ir Infrared Motion Sensor, Activated Voice Welcome Doorbell, Dingdong
eBay
$19.58
$21.76
LED Lighting Accessories - IR Door Sensor Switch For LED Lighting - T-DSS-30W-IR - Task Lighting
www.MyKnobs.com
10% off
$19.58
$21.76
LED Lighting Accessories - IR Door Sensor Switch For LED Lighting - T-DSS-30W-IR - Task Lighting
www.MyKnobs.com
$53.70
Safety Technology International Wireless Motion-Activated Chime: 6 1/4 in Overall Ht Model: STI-3610G
Grainger
$53.70
Safety Technology International Wireless Motion-Activated Chime: 6 1/4 in Overall Ht Model: STI-3610G
Grainger
$39.27
$53.01
SEHOMY 4 Pack Wifi Door Sensor Detector, Smart Wireless Window Sensor Real-Time Alarm, Compatible With Alexa Google Assistant, Home Security Door Open Contact Sensor For Bussiness Burglar Alert Pack Of 2
vyroqi.com
25% off
$39.27
$53.01
SEHOMY 4 Pack Wifi Door Sensor Detector, Smart Wireless Window Sensor Real-Time Alarm, Compatible With Alexa Google Assistant, Home Security Door Open Contact Sensor For Bussiness Burglar Alert Pack Of 2
vyroqi.com
$44.77
$60.44
Door Chime Bistee Wireless Door Alarm Contact Sensor Door Open Bell 600 ft Range With 58 Chimes 5 Volume Levels LED Indicator For Business/Home/Office/Stores (2 Plug-In Receiver 3 Door Sensor) Pack Of 2
vyroqi.com
25% off
$44.77
$60.44
Door Chime Bistee Wireless Door Alarm Contact Sensor Door Open Bell 600 ft Range With 58 Chimes 5 Volume Levels LED Indicator For Business/Home/Office/Stores (2 Plug-In Receiver 3 Door Sensor) Pack Of 2
vyroqi.com
$19.59
Task Lighting IR Door Sensor Switch For LED Lighting T-DSS-30W-IR
DkHardware.com
$19.59
Task Lighting IR Door Sensor Switch For LED Lighting T-DSS-30W-IR
DkHardware.com
$23.89
SAFETY TECHNOLOGY INTERNATIONAL Wireless Entry Alert Sensor, STI-3551
Zoro.com
$23.89
SAFETY TECHNOLOGY INTERNATIONAL Wireless Entry Alert Sensor, STI-3551
Zoro.com
$25.46
Automatic Sliding Door Opener Safety Beam Sensor Infrared Anti-Clip
eBay
$25.46
Automatic Sliding Door Opener Safety Beam Sensor Infrared Anti-Clip
eBay
$233.00
SDC Delayed Egress Locks And Electrical Accessories MD-31DB - SDC Motion Sensor Passive Infrared Egress Sensor, Black
Keyless Access Locks
$233.00
SDC Delayed Egress Locks And Electrical Accessories MD-31DB - SDC Motion Sensor Passive Infrared Egress Sensor, Black
Keyless Access Locks
$67.00
Mechanical Door Sensor, Pair For Infrasolution Smart Access Handles
Server Racks
$67.00
Mechanical Door Sensor, Pair For Infrasolution Smart Access Handles
Server Racks
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YouTubeChemistry Student
How IR Spectroscopy works
Infrared spectroscopy lets us identify bond types and functional groups by seeing which IR wave numbers a molecule absorbs. Each bond vibrates at specific energies, giving a unique pattern — and below 1500 cm⁻¹, the fingerprint region becomes a molecular signature used to identify substances quickly. Perfect for A-Level, IB, AP Chemistry ...
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Infrared Sensor Applications
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Shop infrared door sensor

Sponsored
About our ads
$171.42
$342.92
Single Story Home Security System | Intrusion Protection With Motion And Entry Sensors | Official Simplisafe
SimpliSafe, Inc.
Free shipping
50% off
$171.42
$342.92
Single Story Home Security System | Intrusion Protection With Motion And Entry Sensors | Official Simplisafe
SimpliSafe, Inc.
Free shipping
$20.99
AMHEY Motion Sensor Door Chime, Wireless Motion Detector Alarm Indoor, Business Entry Alert Bell With Buzzer, Doorbell For Home/Garage Door/Store, USB
Amazon.com
129
$20.99
AMHEY Motion Sensor Door Chime, Wireless Motion Detector Alarm Indoor, Business Entry Alert Bell With Buzzer, Doorbell For Home/Garage Door/Store, USB
Amazon.com
129
$47.95
Seco-Larm E-931-S35RRQ Enforcer Indoor/Outdoor Wall Mounted Photoelectric Beam Sensor With 35 Foot Range
Amazon.com
823
Free shipping
$47.95
Seco-Larm E-931-S35RRQ Enforcer Indoor/Outdoor Wall Mounted Photoelectric Beam Sensor With 35 Foot Range
Amazon.com
823
$619.00
FALCON BEA DOOR SENSORS & SECURITY - Sensors & Switches & Sensor Module/Housing Supplies
Radwell.com
$619.00
FALCON BEA DOOR SENSORS & SECURITY - Sensors & Switches & Sensor Module/Housing Supplies
Radwell.com
$386.14
Security Door Controls Infrared Motion Sensor: 1 3/4 in Ht, 7 in Wd Model: MD-31DOW
Grainger
$386.14
Security Door Controls Infrared Motion Sensor: 1 3/4 in Ht, 7 in Wd Model: MD-31DOW
Grainger
$99.99
Ring Alarm Contact Sensor 6-Pack - 2nd Gen | Monitor 6 Doors Or Windows | Instant Alerts | Approximately 3-Year Battery Life | Slim Design | Easy
Amazon.com
28K+
Free shipping
$99.99
Ring Alarm Contact Sensor 6-Pack - 2nd Gen | Monitor 6 Doors Or Windows | Instant Alerts | Approximately 3-Year Battery Life | Slim Design | Easy
Amazon.com
28K+
$381.16
Security Door Controls Infrared Motion Sensor: 2 in Ht, 7 in Wd Model: MD-31DB
Grainger
$381.16
Security Door Controls Infrared Motion Sensor: 2 in Ht, 7 in Wd Model: MD-31DB
Grainger
$267.20
$328.65
BEA - 10SSTI - Presence Sensor - Active Infrared Safety Sensor - Horizontal Or Vertical Door Mounted - 12 To 24 VAC/DC
LocksmithKeyless
18% off
$267.20
$328.65
BEA - 10SSTI - Presence Sensor - Active Infrared Safety Sensor - Horizontal Or Vertical Door Mounted - 12 To 24 VAC/DC
LocksmithKeyless
$26.99
MOBI Smart Wi-Fi Door & Window Sensor Real-Time Alerts, App Control, Easy Install - 2Pk
Target
Free shipping
$26.99
MOBI Smart Wi-Fi Door & Window Sensor Real-Time Alerts, App Control, Easy Install - 2Pk
Target
Free shipping
$197.00
Detex Eax-300 | Door Propped Alarm | Exit Devices, Alarms & Panic Bars
Qualified Hardware
Free shipping
$197.00
Detex Eax-300 | Door Propped Alarm | Exit Devices, Alarms & Panic Bars
Qualified Hardware
Free shipping
$490.35
EAGLE1HM BEA DOOR SENSORS & SECURITY - Sensors & Switches & Photoelectric Supplies
Radwell.com
$490.35
EAGLE1HM BEA DOOR SENSORS & SECURITY - Sensors & Switches & Photoelectric Supplies
Radwell.com
$598.83
$658.71
BEA Superscan III 10SSTIII - Infrared Door Sensor
Action Direct
$598.83
$658.71
BEA Superscan III 10SSTIII - Infrared Door Sensor
Action Direct
$179.97
$359.94
2In1 Automatic Door Sensor, Dual Infrared & Radar Safety Sensor For Door Opener Systems, Multipurpose Use - Silver | On Spot Shop
Inspire Uplift
Free shipping
50% off
$179.97
$359.94
2In1 Automatic Door Sensor, Dual Infrared & Radar Safety Sensor For Door Opener Systems, Multipurpose Use - Silver | On Spot Shop
Inspire Uplift
Free shipping
$179.97
$359.94
2In1 Automatic Door Sensor, Dual Infrared & Radar Safety Sensor For Door Opener Systems, Multipurpose Use - Black | On Spot Shop
Inspire Uplift
Free shipping
50% off
$179.97
$359.94
2In1 Automatic Door Sensor, Dual Infrared & Radar Safety Sensor For Door Opener Systems, Multipurpose Use - Black | On Spot Shop
Inspire Uplift
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SECURITY DOOR CONTROLS Infrared Motion Sensor, MD-31DOW
Zoro.com
$244.99
SECURITY DOOR CONTROLS Infrared Motion Sensor, MD-31DOW
Zoro.com
$335.30
10QUADSCANI - Active Infrared Swing Door Safety Sensor. - (BEA Quadscan I)
Automatics & More
$335.30
10QUADSCANI - Active Infrared Swing Door Safety Sensor. - (BEA Quadscan I)
Automatics & More
$9.94
Wireless Infrared Motion Sensor Welcome Alarm Doorbell (White)
bigupgadgets.com
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Wireless Infrared Motion Sensor Welcome Alarm Doorbell (White)
bigupgadgets.com
$287.00
BEA 10SSTI Active Infrared Safety Sensor Door Mounted Horizontal Or Vertical Mounting 12 To 24 V AC/DC
B and H Depot
$287.00
BEA 10SSTI Active Infrared Safety Sensor Door Mounted Horizontal Or Vertical Mounting 12 To 24 V AC/DC
B and H Depot