Overview
PIR sensors allow you to sense motion, almost always used to detect whether a human has moved in or out of the sensors range. They are small, inexpensive, low-power, easy to use and don't wear out. For that reason they are commonly found in appliances and gadgets used in homes or businesses. They are often referred to as PIR, "Passive Infrared", "Pyroelectric", or "IR motion" sensors.
Feature
Slight movement can be detectable
High immunity to external noise (vibration, etc.)
Custom design is available.
Technical Data
1.Maximum Ratings
Characteristics | Symbol | My. Value | Max. Value | Unit | Remarks |
Working Temperature | TST | -20 | 85 | °C |
|
Max.current | Into | -100 | 100 | mA |
|
Storage Temperature | TST | -40 | 125 | °C |
|
2.Working Conditions (T=25°C, Vdd=3V，Except other requirements)
Characteristics | Symbol | Min. | Type | Max. | Unit | Remarks |
Supply Voltage | VDD | 2.7 | 3 | 3.3 | V | IR = 0.5mA |
Working Current | IDD | 9 | 12 | 15 | μA |
|
Sensitivity threshold value | VSENS |
| 50 |
| μV |
|
Output REL | ||||||
Output Low Current | IOL | 10 |
|
| mA | VOL<1V |
Output High Current | JOHN |
|
| -10 | mA | VOL>(VDD-1V |
Output Low current Lock time | T OL |
| 2.3 |
| s | Non-adjustable |
Output High current Lock time | T OH |
| 2.3 |
| s |
|
Oscillator & Filter | ||||||
Low pass filter cut-off frequency |
|
|
| 7 | Hz |
|
High pass filter cut-off frequency |
|
|
| 0.44 | Hz |
|
Oscillator frequency on Chip | FCLK |
|
| 64 | kHz |
|
Application
Security Equipment
Wireless security sensors
Security cameras
Security alarm system
FAQ
1.What can trigger a low voltage PIR sensor?
Five Causes of PIR False Alarms. The first cause of PIR false alarms is low or unstable voltage at the detector. Test to make sure the voltage at each PIR is above 13VDC and stable. The second cause of false alarms is sudden infrared movement / heat changes in view of the detector.
2.How do PIR sensors work?
When the wide angle pir sensor is idle, both slots detect the same amount of IR, the ambient amount radiated from the room or walls or outdoors. When a warm body like a human or animal passes by, it first intercepts one half of the PIR sensor, which causes a positive differential change between the two halves.
Senba is one of the most professional PIR sensor manufacturers for more than 15 years. We are the most advanced factory with complete categories. With strong R&D center, there are digital type and analog type, dual elements and four elements for you choose. The market cover domestic market, Korean, Amertica, Turkey and Europe.
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