885

The Honeywell/System Sensor 885 is a conventional 2-wire fixed-temperature heat detector rated at 63°C (145°F), designed for open-area fire protection when paired with the B801RA plug-in base.
It provides reliable thermal detection with latching LED alarm indication and automatic reset via power cycle, compatible with UL-listed 12/24V fire alarm control panels.
Key Specifications
Feature
Details
Type
Fixed temperature 63°C (145°F), 2-wire conventional 
Dimensions
Diameter: 10.2 cm (4"), Height: 4.8 cm (1.8") with base 
Operating Voltage
8.5-30 VDC (12/24V nominal) 
Standby Current
≤50 µA 
Alarm Current
2-80 mA (limited by panel ≤100 mA) 
Temperature Range
0-38°C (32-100°F) 
Humidity Range
10-93% RH, non-condensing ​
Base Features
B801RA: Remote annunciator (+RA terminals), 50/60mm box mount