The device is strictly developed in accordance with ANSI/UL 217:2024 (10th Edition) Clause 69 dust testing provisions and Figure 69.1 standard drawing for the dust endurance test of standalone smoke alarms, meeting the pre-test requirements for North American UL certification and laboratory type tests.
Test purpose: To simulate the long-term exposure of smoke alarms to environmental dust accumulation, and to evaluate the sensitivity drift, false alarms, and fault indication functions of the detector after dust pollution. It is a mandatory test item for UL certification of smoke sensing products.
Test principle: Standard cement dust (200 mesh) is introduced into the sealed test chamber, and compressed air is continuously circulated to lift the dust, ensuring uniform dust coverage of the sample in the chamber; the dust is continuously blown for 15 minutes. After the test, the alarm is removed and the smoke sensitivity test is conducted again to verify whether the sensitivity drift meets the standard limit and whether there is any functional failure.
Technical Detail of UL 217 Dust Test Chamber：：
Model No.
ZNUL217-DT
Applicable Products
Gas Alarm Carbon monoxide detector, combustible gas detector
Application
Factory R&D test, FPC audit test,
Standards
ANSI/UL 217:2024 Clause 69, CAN/ULC S531:2024
Capacity
10 Samples
Overall size
Φ559mm × total height 1093mm (strictly following the standard drawing dimensions) Wind speed: 0~1.2 m/s, DC motor speed regulation, software set speed
