Siemens 500-081806 Dual-Chamber Ionization Smoke Detector

Description The Siemens 500-081806 is a dual-chamber ionization smoke detector designed for fire detection in compatible Siemens and Cerberus Pyrotronics alarm systems. It monitors airborne combustion particles and interfaces with a compatible detector base to provide automatic smoke detection in protected indoor areas. Technical Specifications Condition New/Never Used Surplus Brand Siemens Category Fire Alarm Systems Part Number 500-081806 Subcategory Ionization Smoke Detectors Product Type Smoke Detector Sensing Technology Dual-Chamber Ionization Operating Voltage 21 ± 3 VDC Standby Current 100 µA Power-Up Surge Current 350 µA Peak Alarm Current 80 mA Operating Temperature 32°F to 100°F (0°C to 38°C), UL Relative Humidity 0–93% RH Air Velocity Rating 0–300 ft/min Compatible Standard Base DB-3S Compatible Audible Base ADB-3 Weight 1 lb (0.45 kg) Information About 500-081806 The 500-081806 is a Siemens ionization smoke detector built around a dual-chamber sensing configuration for automatic fire detection applications. The detector operates with compatible DB-3S standard or ADB-3 audible bases and receives its operating power through the associated fire alarm circuit. Its electrical design operates at 21 ± 3 VDC with low standby current while providing increased current during an alarm condition. The detector is a legacy device that has been superseded by the Siemens OP121 with a DB-11 base for applicable replacement installations. Key Features: Dual-Chamber Ionization: Uses dual ionization chambers to detect airborne combustion particles associated with developing fires. 21 VDC Operation: Designed for a nominal operating voltage of 21 ± 3 VDC from compatible fire alarm equipment. Low Standby Current: Draws approximately 100 µA during normal standby operation. Alarm Current: Draws approximately 80 mA when operating in an alarm condition. Detector Base Compatibility: Installs with a DB-3S standard base or compatible ADB-3 audible base. Environmental Rating: Operates from 32°F to 100°F (0°C to 38°C) under its UL-rated conditions. Airflow Compatibility: Rated for air velocities from 0 to 300 ft/min in applicable installations. Legacy Replacement Reference: Superseded by the Siemens OP121 detector with DB-11 base for applicable system upgrades. The 500-081806 delivers the reliability and precision required for automatic ionization smoke detection within compatible legacy Siemens fire alarm systems.