FireClass 517.025.056 DPK6 Duct Probe with 4B-C 4” Continuity Base

The Tyco DPK6 duct probe units (517.025.056) smoke detectors are not typically installed directly inside ducts because the airflow only permits the detector to sample air from a small section of the duct, leading to rapid dirt accumulation. Instead, ducting is safeguarded by the use of probe units, which collect air from a cross-section of the duct and pass it through a smoke detector head.
 
In most cases, smoke or combustion products are likely to have traveled some distance, aging the smoke before reaching the probe unit. Therefore, it is usually recommended to fit an optical smoke detector, often a requirement of building regulations. The DPK6 duct probe units use Generation6 850PH and 830PH Multi-Sensor Smoke Detectors. DPK6 Duct Probe Units have been developed to detect smoke in ventilation ducts, offering significant benefits in terms of performance and installation.