Senba Sensing Technology Co., Ltd.
4 Pins Passive Infrared Sensor BL412 for Alarm System
4 Pins Passive Infrared Sensor BL412 for Alarm System

4 Pins Passive Infrared Sensor BL412 for Alarm System

Overview

Senba PIR Motion Sensors are passive infrared type sensors. Working temperature is -20~ 85℃. There are 3type for PIR sensor, 3pins, 4pins, 6pins. For 3 pins type, 2s not adjustable. For 4pins, delay time adjustable. For 6pins, delay time, sensitivity, lighting adjustable.

 


Features

  • Robust Design Against False Starts

  • Low Curvature Lens


Technical Data

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


μA


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

BL412 Interior Block Diagram.jpg


Application

  • Intelligent security- burglar alarm

  • Wireless infrared detection alarm, uses advanced signal analysis and processing technology. When the intruder enters through the detection area, it sends alarm signal to control panel.

  • The PIR sensor is suitable for home, residential area, factory, shopping mall, warehouse, and offices.

 

FAQ

1.Why is PIR sensor called passive?

The sensor is called passive because it doesn't emit light to get measurements. The sensor in PIR is actually split into two parts. The reason for that is to measure motion. ... The sensor is also sensitive enough to even detect IR radiation source movement while the object is already in it's field of view.

 

2.How far can a motion sensor detect?

Most low-cost motion detectors can detect up to distances of at least 15 feet (4.6 m).

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