Aspirating Smoke Detection Solution for Cold Storage Rooms Using ANWETECH AS01
Cold storage rooms and freezer warehouses are different from normal storage areas. They often operate under low-temperature conditions, use strong refrigeration airflow, and store goods in dense pallet racks or high-bay shelving systems. These conditions can make smoke movement more difficult to predict.
In a normal room, smoke usually rises toward ceiling-mounted detectors. In a cold storage room, however, air circulation from evaporators and refrigeration fans may dilute, redirect, or delay smoke movement. This can make early fire detection more challenging, especially when the fire starts inside packaging areas, electrical equipment, pallet storage zones, or concealed spaces between racks.
For cold chain facilities, early detection is critical. A small electrical fault, overheated cable, damaged motor, or smoldering packaging material can quickly lead to product loss, business interruption, refrigeration system shutdown, and high-value inventory damage.
Conventional point-type smoke detectors are widely used in many buildings, but cold storage rooms create special engineering challenges. Smoke may not reach a ceiling detector quickly because of forced airflow and low-temperature stratification. In high-rack freezer warehouses, goods and shelving can also block or delay smoke movement.
Maintenance is another issue. When detectors are installed inside a freezer room or at high ceiling level, routine inspection and replacement can become difficult. Technicians may need special access equipment, protective clothing, and planned shutdown time. This increases maintenance cost and reduces operational flexibility.
For these reasons, many cold storage and freezer warehouse projects require a detection method that can actively monitor the protected area instead of waiting for smoke to naturally reach a detector.
ANWETECH AS01 is a stand-alone laser cavity aspirating smoke detector designed for very early warning smoke detection. Instead of relying only on passive smoke movement, AS01 actively draws air samples through a sampling pipe network and analyzes smoke particle concentration inside the detector unit.
The detector uses laser-based smoke particle analysis to detect minute smoke particles at an early combustion stage. This makes it suitable for applications where early warning is more important than simple fire confirmation.
For cold storage applications, the main advantage is active air sampling. Sampling holes can be arranged in selected protection zones, such as rack aisles, ceiling areas, electrical control zones, cold room panels, or areas near refrigeration equipment. The detector continuously samples air from these locations and provides smoke concentration monitoring and alarm output when preset thresholds are reached.
Cold storage rooms often have strong air movement caused by refrigeration fans. AS01 uses a pipe network to continuously draw air samples from the protected area. This helps reduce dependence on natural smoke travel and supports earlier warning in complex airflow environments.
AS01 uses laser scattering technology to measure smoke particle concentration. This supports high-sensitivity smoke detection for early-stage fire conditions, including smoldering materials, overheating cables, electrical faults, and packaging-related smoke sources.
The AS01 technical data lists an operating temperature range from -40°C to +65°C. This makes the detector suitable for many low-temperature fire detection applications when installed and applied according to project design requirements.
AS01 provides five alarm levels: Warning, Pre-alarm, Patrol, Fire Alarm 1, and Fire Alarm 2. For cold storage rooms, this is useful because operators can investigate abnormal smoke conditions before the situation develops into a full fire alarm event.
A typical response logic can be arranged as follows:
AS01 supports RS485 communication and multiple relay outputs. In a cold storage project, these outputs can be connected to a fire alarm control panel, BMS, remote monitoring system, or other approved alarm interface.
For fire suppression release or emergency shutdown logic, the AS01 should provide detection and alarm signals to the approved fire control system. The final fire suppression control sequence should be handled by the fire alarm panel, extinguishing control panel, or project-approved control system.
A typical AS01 cold storage smoke detection solution includes the following parts:
Cold Storage Room
→ Sampling Pipe Network
→ AS01 Aspirating Smoke Detector
→ Relay Output / RS485 Communication
→ Fire Alarm Panel / BMS / Remote Alarm System
The detector unit may be installed in a service corridor, equipment area, or accessible maintenance location, while the sampling pipe network extends into the cold storage room. This layout can make inspection and maintenance easier because the detector display, wiring, filters, and alarm outputs are accessible without frequent entry into the freezer area.
The sampling pipe network should be designed according to the protected area layout, rack arrangement, airflow direction, and fire risk points. Sampling holes should be positioned where air samples can represent the protected zone effectively.
Sampling pipe design is one of the most important parts of an aspirating smoke detection solution. For cold storage applications, the following points should be considered during engineering design:
Cold rooms often contain pallets, cartons, insulation panels, storage racks, and moving goods. Sampling holes should not be blocked by stored products or shelving structures. The pipe route should be easy to inspect and protected from mechanical damage.
Sampling holes should not be positioned where refrigeration air jets can directly disturb stable sampling. The pipe design should consider airflow from evaporators, fans, doors, and loading areas.
Cold storage rooms may have frost, ice build-up, and condensation risk. The sampling pipe should be arranged to reduce moisture accumulation and sampling hole blockage. Regular airflow inspection is important to confirm that the pipe network remains functional.
All pipe connections must be sealed to prevent air leakage. Air leakage can reduce sampling performance and affect detection reliability.
The sampling pipe layout, pipe length, sampling hole quantity, hole spacing, and hole orientation should follow approved design drawings and commissioning requirements. The final design should be verified according to the actual cold storage room size, airflow condition, and fire protection strategy.
Cold storage rooms are not free from fire risk. Although the room temperature is low, many fire sources can still exist, including:
In many cold storage facilities, the most serious losses are not only caused by flames, but also by smoke contamination, refrigeration shutdown, inventory damage, and business interruption. Very early smoke detection helps operators respond before a small abnormal condition becomes a major fire event.
Some cold storage facilities use ammonia refrigeration systems. ANWETECH AS01 is a smoke detection device, not an ammonia gas detector. It detects smoke particles for early fire warning.
If the cold storage project requires ammonia leakage monitoring, a dedicated NH3 gas detection system should be used together with the smoke detection system. AS01 can be part of the fire detection solution, while NH3 detectors are used for refrigerant leak safety monitoring.
Cold storage environments require planned maintenance because frost, dust, packaging particles, or moisture may affect the sampling pipe network over time.
A recommended maintenance approach includes:
After pipe cleaning, airflow should be verified again to confirm that the sampling system is operating normally.
For freezer warehouses, maintenance access should be considered during the design stage. Installing the detector unit in an accessible area can reduce service difficulty and help operators perform routine inspections more efficiently.
ANWETECH AS01 can be used in different cold storage and refrigerated facility applications, including:
ANWETECH AS01 provides an engineering-focused smoke detection solution for cold storage rooms where early warning, active sampling, and system integration are important.
Its active air sampling design helps monitor difficult environments where smoke movement may be affected by refrigeration airflow and storage layout. Its laser cavity smoke analysis supports early detection of minute smoke particles. Multi-level alarm outputs allow operators to respond step by step, while RS485 and relay outputs support connection to fire alarm systems, BMS, and remote monitoring platforms.
For cold storage rooms, freezer warehouses, and cold chain logistics facilities, AS01 helps improve early fire warning capability and supports a more reliable fire protection strategy for high-value refrigerated assets.
