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LX-SO-215 is a digital low-power smoke alarm, product 

design follows the EU EN14604 standard, the use of 

high-performance chip as a stand-alone photoelectric smoke 

fire alarm MCU, digital signal processing makes the alarm 

detection more Accurate, better product sensitivity 

consistency, MCU built-in FLASH memory, store the 

detector's factory parameters, maintenance information, to 

achieve a strong self-diagnostic testing, circuit failure, sensor 

failure, battery voltage and other parameters of the detection 

and diagnosis. At the same time, adaptive compensation 

function will be based on ambient temperature, external 

factors such as changes in the conditions of fire sensitivity 

compensation to the appropriate range, enhanced product 

stability. The average standby current of the product is less 

than 3uA standby power consumption, working time up to 10 

years.

Summary

(1) When the power is on, the buzzer beep beep prompts 

power-on success.

(2) When the battery enters the low voltage, half-beep beep 

LED synchronization light.

(3) In the smoke-free alarm, press the button for 3 seconds, 

the alarm will beeps and beeps three times, the same sound 

as the smoke alarm sound.

(4) When the smoke alarm, press the button to enter the mute 

mode, the buzzer is muted, the LED will continue the light 

alarm when there is smoke, the mute time is 10 minutes, when 

mute, press the button is invalid.

Function

32.5mm

66mm

88mm

7.8mm

3.2mm

125mm

LX-SO-215

Product size

Product test button

/

The mute button
Working indicator 

light

3, One for each bedroom;

4, If the bedroom corridor length of more than 40 feet (12 

meters) long, both ends of the corridor fitted with alarm;

5. Put one in the semi-closed or fully closed sleeping room 

because the smoke will be blocked by the closed door. If the 

door is closed, the alarm sound in the corridor calls for the 

awakened asleep;

6, At the bottom of the basement stairs to install alarm;

7, On the first floor to the top of the second floor of the stairs 

to install alarm;

8, The other in the living room, kitchen, attic and storage room 

to install alarm;

9, Try to alarm close to the middle of the ceiling, if this is 

impractical, the distance from the wall or corner in the ceiling 

can not be less than 20 inches (50CM), as shown in Figure 3;

10, If the roof is oblique or sharp, the installation location from 

the top of the highest point can not be less than 3 feet (0.9 m), 

as shown in Figure 4.

Fiure 1

living room

family room

bedroom

kitchen

bedroom

bedroom

bedroom

smoke alarm

alarm

for minimum security

smoke

for more security

Figure 2

smoke

for minimum security

floor

garage

basement

kitchen

ground

bedroom

bedroom

bedroom

alarm

Figure 3

WALL

best location

acceptable location

50CM(20'')

MINIMUM

never here

CEILING

certer of ceiling

Figure 4

0.9M(3ft)

horizontal distance from peak

alarm

Power source: DC3V   

Battery Specifications: CR123A   

Battery life: 10 years    

Static current: ≤3uA 

Alarm current: <30mA   

Low voltage alarm: 2.7V±0.05V   

Alarm sonority: >85 db (3m)   

Working temperature:0°C~40°C

Working humidity: 10%-95%RH

Specifications

Where to install smoke alarms

1, In each separate bedroom outside the hallway installed 

one, shown in Figure 1;

2, In a multi-family home or apartment building on each floor 

to install one, shown in Figure 2;

Digital Smoke Alarm

 R

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