Model: SM31R
SM31R Wireless Interlinked Photoelectric Smoke Alarm
The SM31R wireless interlinked photoelectric smoke alarm uses an infrared sensing chamber with light scattering technology to detect smoke, triggering a loud and durable 85 dB alarm. It supports Zigbee or 433MHz communication for linking up to 30 devices and is certified by TUV as an ordinary smoke alarm, compliant with EN14604 standards.
Unit Price: $7.96 – $9.83
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Model | SM31R |
|---|---|
Unit Size | 80 * 80 * 31mm |
Packge Size | 85 * 85 * 38mm |
Package Weight | 150g |
Standards & Approvals | EN14604: 2005/AC: 2008 ,RED&ROHS |
Lifetime | 10 years |
MOQ | 50 PSC |
Detection Performance
Detection principle | Photo-electric light scattering |
|---|---|
Smoke sensitivity | 0.09 – 0.17 dB/m |
CO sensitivity | NA |
Wireless & Networking
Digital communication | Zigbee or 433MHZ |
|---|---|
Max. interlinked units | Max 30pcs per group/loop |
Working distance (open-air) | Up to 100m (Outdoor open) |
Power & Electrical
Power supply | DC 3V,Lithium Battery，CR123A |
|---|---|
Stand-by current | 30 µA max |
Alarm current (max) | 70 mA max |
Low-battery threshold | 2.6 ± 0.1 V |
Sampling rate | 1 Hz |
Audio & User Interface
Sound level | >85 dB(A) at 3 meters |
|---|---|
Silence duration | 0% to 95% RH (no condensation or icing) |
Status indicator | Red LED (Alarm) |
Environmental & Mechanical
Operating temperature | 14 ºF to 131 ºF (-10°C to 55°C) |
|---|---|
Humidity range | 0% to 95% RH (no condensation or icing) |
Atmospheric-pressure effect | None |
Air-velocity limit | 0 – 300 fpm |
IP rating | IPx4 |
Housing material | White flame-retardant polycarbonate |
Terminal material | Tin plated stainless steel |
Certification
CE EN50291 For CO alarm 
SM11 EMC certification 
BS5446 Approval 
AS3786 2023 certification 
RED For wireless combination alarm 
CE EN14604 from TUV 
Smoke alarm Rohs Approval 
EMC For CO alarm 
SGS For CO alarm 
CE UL2075 From TUV 
CE EN14604 From CPR 
RCM Test Report For YK01
SM11 Australian Design Patent 
Heat alarm design patent 
Gas alarm testing device -
Gas alarm design patent 
A Kitchen Smoke & Heat Detector 
Smoke alarm design patent 
Combined alarm design patent -
CO alarm design patent
ISO 9001 Certificate 
BSCI Certificate
Full-Dimensional Customization Capabilities
From concept to mass production — UL, EN, AS, CE certified design capabilities with systematic quality control beyond simple OEM.
Size & Shape
Circle
Dimensions | 90-120mm (3.54-4.72″) |
Thickness | 30-70mm |
Square
Dimensions | 100-120mm (3.94-4.72″) |
Thickness | 30-70mm |
Rectangle
Dimensions | 40-100mm (1.57-3.94″) |
Thickness | 30-70mm |
Oval/Special
Dimensions | Custom |
Thickness | Ultra-thin available |
Materials & Finish
Meterials
ABS
PVC
PC
HIPS
PP
UV-resistant
Surface
Matte
Glossy
Frosted
Colors
Pure White
Ivory
Black/Grey
Pantone
Logo & Printing Methods
Laser Engraving
Permanent, eco-friendly, non-contact processing
Heat Transfer Printing
Complex patterns & gradients, high temperature resistant
Screen Printing
Solid colors, simple patterns, strong adhesion
In-Mold Decoration
Injection-molded permanent marking
Pad Printing
3D surface printing, conductive inks available
Packaging Solutions
Color Box
Hang Tag Retail
Amazon FBA
Kraft Paper Eco
Bulk Engineeredv
Custom Trays + UPC
Alarm Software
Standard Curves
Per country
Custom Timing
Alarm logic
Sound & Voice
Audio modes
Silence Logic
Mute control
LED Patterns
Display
Power Options
Communication Links
The SM31R-001 Wireless Photoelectric Smoke Alarm is loud voice and more durable alarms, which monitors smoke by using a chamber and electrochemical sensor. The chamber utilizes infrared emission and reception technology. When there is no smoke in the environment, the receiver cannot receive infrared light; when there is smoke, smoke particles scatter infrared light, altering the receiver’s signal and triggering the alarm. It is classified as an ordinary Alarm by TUV.
Key Features
CFS® (Shenzhen Fire Security Technology Co., Ltd.), as a leading manufacturer specializing in fire safety alarms, we design and produce a comprehensive range of Smoke Alarms, CO Alarms, and Combo Alarms to protect homes and businesses worldwide.
🏭 OEM & ODM Services Available
We offer complete customization services including private labeling, custom packaging, and product modifications to meet your specific market requirements.
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