Bosch D281A Ionization Smoke Detector

The Bosch D281A is a conventional ionization smoke detector designed to provide dependable fire detection in commercial fire alarm systems. Utilizing dual chamber ionization sensing technology, it responds rapidly to fast flaming fires while maintaining reliable operation in environments with temperature, humidity, vibration, and electromagnetic interference.

Its removable detector head simplifies installation, cleaning, testing, and maintenance, making the D281A well suited for commercial buildings, plenum spaces, and raised floor installations requiring dependable conventional smoke detection.

Product Functions

• Detects smoke using ionization sensing technology
• Reports alarm conditions to the fire alarm control panel
• Continuously monitors smoke conditions
• Supports magnetic functional testing
• Performs continuous detector supervision
• Provides rapid response to fast flaming fires
• Supports conventional fire alarm systems
• Simplifies detector maintenance and servicing

Electrical & System Information

The D281A operates from regulated 24 VDC conventional fire alarm circuits and utilizes a dual chamber ionization design to monitor airborne combustion particles. The detector incorporates a moisture resistant reed switch that allows magnetic functional testing without exposing the sensing chamber.

The non polarized detector head is compatible with approved Bosch two wire and four wire detector bases, allowing simplified installation and replacement while maintaining reliable detector operation.

Features

The D281A features dual chamber ionization sensing technology, removable non polarized detector head, magnetic reed switch testing, moisture resistant construction, compatibility with two wire and four wire detector bases, high immunity to humidity, vibration, and electromagnetic interference, commercial grade construction, and dependable performance for conventional fire alarm systems.

Protection & Applications

Suitable for:

• Commercial Fire Alarm Systems
• Office Buildings
• Hospitals
• Healthcare Facilities
• Schools and Universities
• Hotels
• Government Buildings
• Industrial Facilities
• Warehouses
• Plenum Areas
• Raised Floor Installations
• Indoor Fire Detection

D281A