Senba Sensing Technology Co., Ltd.
4pins Digital Smart Pyroelectric Detector BS412
4pins Digital Smart Pyroelectric Detector BS412

4pins Digital Smart Pyroelectric Detector BS412

Overview

BS412 is a newest smart digital motion detector with a small window size. It offers a complete motion detector solution, with all electronic circuitry built into the detector housing. Only a power supply and power-switching components need to be added to make the entire motion switch.


BS412 includes the time setting only.


Features of BS412 Pyroelectric Motion Sensor

  • Built-in filter, screen the interference by other frequency

  • Excellent power supply rejection, Insensitive to RF interference


Technical Data of BS412 Pyroelectric Motion Sensor

1.Maximum Ratings

Characteristics

Symbol

Min. Value

Max. Value

Unit

Remarks

Supply Voltage

VDD

-0.3

3.6

V


Working Temperature

TST

-20

85


Max.current for pin

Into

-100

100

mA


Storage Temperature

TST

-40

125



2.Working Conditions (T=25°C,Vdd=3V,Except other requirements)

Characteristics

Symbol

Min.

Type

Max.

Unit

Remarks

Supply Voltage

VDD

2.0

3

3.3

V

IR=0.5mA

Working Current

IDD

9

9.5

11

μA


Sensitivity

VSENS


90


μV


Output REL

Output Low Current

IOL

10



mA

VOL<1V

Output High Current

IOH



-10

mA

VOL>(VDD-1V)

Lock time

TOL


2.3


s


On-time

TOH

2


3600

s


ONTIME

Input voltage


0


VDD

V

0V to ¼ VDD

Input Bias Current


-1


1

μA


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


Interior Block Diagram

BS412 Interior Block Diagram.jpg


4pins Digital Smart Pyroelectric Detector BS412.png


Applications of BS412 Pyroelectric Infrared Sensor

  • home security systems

  • As its ability to sense warm, moving objects such as people walking into a room is coupled with simplicity and cost effectiveness.


FAQ of Pyroelectric Sensor

1.Can PIR sensor detect cars?

PIR-based Motion Detection: In this case motion is detected by means of a PIR sensor, a passive infrared sensor. This sensor detects emitted infrared energy from objects (humans and animals, but also cars) in the form of heat.

 

2.Do PIR sensors work in the dark?

Yes, motion sensors work in the dark. The way that a motion sensor detects movement has nothing to do with how light or dark it is in the immediate area. ... Since infrared energy is present and can be detected regardless of the amount of light in the environment, a PIR motion sensor will work just fine in the dark.

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