Zhejiang, China
Business Type:
Year of Establishment:
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Average Lead Time:
Peak season lead time: 1-3 months
Off season lead time: within 15 workdays
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Smoke Detector, Cigarette Smoke Detector, Smoke Detector Prices manufacturer / supplier in China, offering Conventional / Addressalbe Smoke Detector UL and En54 Approved (SNC-300-S2), 2-Wire Conventional Smoke Detector UL and En54 Approved (SNC-300-S2-U), 2017 Newest Smart Relay Output Smoke and Heat Detector (403-003) and so on.

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Supplier Homepage Products New Products Conventional / Addressalbe Smoke Detector UL and En54 Approved (SNC-300-S2)

Conventional / Addressalbe Smoke Detector UL and En54 Approved (SNC-300-S2)

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Min. Order / Reference FOB Price
2,000 Pieces US $1/ Piece
Port: Ningbo, China
Production Capacity: 200, 000 PCS/Month
Payment Terms: L/C, T/T, D/P, Western Union, Paypal
Type: Smoke Detector
Usage: Fire Alarm
Installation Mode: Ceiling Mounted
Certification: CE, RoHS, En 54 and UL
Application: Home, Industry
Product Approval: UL521/UL268

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Basic Info

Model NO.
Operating Voltage
Sampling Time
Reset Time
Transport Package
1/Box, 100PCS/CTN
UL 268 / EN 54-7 / CE
Ningbo, China
HS Code
UL, EN54, BSI approval, 2-wire: DC 10.8-33V, 4-wire: DC 12V,24V,48V;  Available with Remote LED Output or Relay Output Function; High Immunity against unwanted alarms.
SNC-300 non-addressable photoelectric smoke detectors are state-of-the-art detectors suitable for connection to 2-wire or 4-wire non-addressable fire detection control and indicating equipment, or to addressable fire detection control and indicating equipment that can accept non-addressable type detectors.

Advanced electronics in conjunction with a photoelectric smoke sensing chamber provide early detection of fire and high immunity against unwanted alarms.


·    Photoelectric smoke sensor
·    Analogue detection discrimination
·    Dual LEDs for 360° visibility
·    2-wire and 4-wire models for DC 12 V and DC 24 V operation
·    4-wire model for DC 48 V operation
·    4-wire models available with a N/O alarm relay output
·    4-wire models available with auto-reset
·    2-wire models available with remote LED output
·    Connects to zone monitor for use with addressable control and indicating equipment

Conventional / Addressalbe Smoke Detector UL and En54 Approved (SNC-300-S2)Conventional / Addressalbe Smoke Detector UL and En54 Approved (SNC-300-S2)


Operating voltageDC (12/24/48) V
Start-up current≤ 135 µA
Start-up time≤ 30 s
Quiescent current≤ 75 µA
Sampling time(3 ~ 5) s
Alarm indicatorDual red LEDs
Remote LED output current (max)15 mA
Reset voltage≤ 1 V
Reset time≤ 5 s
Alarm response threshold(0.08 ~ 0.15) dB/m
Alarm output relaySPST. N/O
Operating temperature(-10 ~ +55) °C
Operating humidity(0 ~ 95) % RH, non-condensing
Dimensions (excluding contacts)Φ 102 mm × 45 mm

Ordering Information: 
Part Number2-wire4-wireRemote IndicatorRelay OutputAuto-Reset
SNC-300-S2 a----
SNC-300-SL a---
SNC-300-SR a---
SNC-300-SRR a----
SNC-300-S2-U b----
SNC-300-SL-U b---
SNC-300-SR-U b---

About Numens
Formed in 2010, Numens is an emerging supplier of professional safety products for fire detection and alarm systems. Numens supplies an extensive range of addressable, non-addressable and residential products for life safety and property protection applications. Offering over 150 products and supplying to more than 100 customers around the globe, we are committed to establishing long-term relationships with our customers and suppliers.
Mission and Values
Our mission is to provide building owners with high quality, inexpensive fire detection and related equipment that will protect lives of building occupants and minimize damage to buildings through early detection and warning of a fire emergency.
Our engineers, production and support staff will design, manufacture and deliver products with performance and quality to always delight our customers.
Success in our future depends on the integrity and ethical behaviour of all our employees. We support and nourish our staff to improve and grow as responsible members of a civil society. We take personal responsibility for our actions and respect others with different views, as we continually strive for improvements for our customers, our company and ourselves.
Sales, engineering and production are located in Ningbo, China; just 2 hours south of Shanghai. Our Ningbo site has 10,000 m2 (100,000 ft2) of floor-space. From product concept, electrical and mechanical design, we can provide the solutions to detection needs. Our manufacturing is vertically integrated, with our capabilities including tool-making, plastic injection moulding, SMT manufacturing, and final assembly and test.
You can view our product range on our website or in our product catalogue (document number 34-0001).
Standards and Approvals
Standards approvals are important to us, giving customers additional confidence of the performance and reliability of our products. We are certified to ISO 9001:2008 and our products carry approvals to major European and North American Standards.

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