What is a pressurized fan smoke sensor? Why does every building need one?
Posted on: 10/11/2025
The pressure fan-mounted smoke sensor is an early smoke detection device, usually installed on the pressure fan or air duct, helping the fire protection system automatically activate the fan, maintain positive pressure in the fire escape, and prevent smoke from spreading into the safe area.
High sensitivity, immediate response when there is smoke.
Easy installation, suitable for many pressure fan systems.
Comply with fire protection standards, ensuring safety for high-rise buildings, apartments, basements, and technical rooms.
SL-2000-P: Smoke Detector for Duct Systems
Main Benefits of the Duct Smoke Detector
1. Early Smoke Detection
The smoke detector installed in pressurization fans can detect smoke at the early stages of a fire. This allows the system to provide an early warning, reducing the risk of fire spread and protecting both people and property in the building
2. Automatic and Accurate Operation
3. Compliance with Fire Safety Standards and High Durability
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The device meets fire protection standards, ensuring easy system approval. Additionally, the detector has a long service life and is suitable for industrial environments or high-rise buildings, ensuring stable operation for many years
Explore other smoke detector series
Technical Specifications
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Technical Specifications
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Details
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Product Model
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SL-2000-P
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Operating Voltage:
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230VAC: 12 mA (standby), 18 mA (alarm)
115VAC: 22 mA (standby), 32 mA (alarm)
24VAC: 55 mA (standby), 190 mA (alarm)
24VDC: 14 mA (standby), 68 mA (alarm)
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Standards and Certifications:
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UL & CUL Listed (UL268A, UROX, UROX7) File # S2829
CSFM Listed (3240-1004:105)
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Relay Contacts:
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Alarm: 2 sets form C, 10A @115VAC; 1 set form A, 2A
Trouble: 1 set form C, 10A @115VAC
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Air Velocity:
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100 – 4,000 ft./min
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Material:
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Gray plastic backbox, clear plastic cover (Makrolon 94V-0)
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Dimensions:
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13 1/2” L x 4 1/2” W x 2 1/4” H
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Weight:
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2 1/2 lbs
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Included Accessories:
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7” exhaust tube, sampling tube end cap, mounting template, test magnet, and mounting hardware
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Download the official SL-2000-P Datasheet.
Ideal Applications and Easy Maintenance Features
The SL-2000-P can be applied in various fields:
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1. Stair Pressurization Fans and Escape Corridors
2. Basement Ventilation and Technical Rooms
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In basements or technical rooms, smoke can spread quickly and be difficult to control. The SL-2000-P detects smoke early and shuts down the pressurization fan, preventing smoke from spreading to other areas and protecting critical equipment and assets
3. Central HVAC and Air Conditioning Systems
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When installed in HVAC systems, the detector monitors airflow within ducts. Upon detecting smoke, it shuts down fans to prevent smoke from spreading through the air conditioning system, keeping other areas safe.
4. Areas Requiring Continuous Smoke Monitoring in Airflow
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Certain specialized areas such as factories, data centers, or server rooms require continuous smoke monitoring. The SL-2000-P ensures the fire protection system responds immediately, preventing smoke from spreading rapidly, reducing fire risk, and minimizing property damage.
Contact us now for professional technical advice and to receive the best quotation for the SL-2000-P smoke detector, a genuine product with 12-month warranty!
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