Smoke detector SATEL MSD-300, photoelectrical reflection, battery CR123A, Ø108 mm, height 61 mm

The SATEL MSD-300 is a photoelectrical reflection smoke detector designed for reliable fire detection in residential, commercial and public spaces. Battery powered with a CR123A cell, the detector offers compact dimensions of 108 mm diameter and 61 mm height and a lightweight form factor of approximately 170 g. Certified to EN 54-5 and EN 54-7, the device meets relevant standards for optical smoke detection and is intended for locations where a wired power supply is impractical or where wireless solutions are preferred.

Advantages

The photoelectrical reflection sensor provides prompt detection of visible combustion particles while reducing false alarms from harmless vapors. Battery operation simplifies installation and placement flexibility without the need for wiring. The detector’s compact round housing and low weight make it easy to mount on ceilings or walls. Certification to EN 54-5 and EN 54-7 ensures conformity with European standards for optical smoke detectors, supporting use in regulated installations.

Suitable for

• Residential apartments and houses
• Small offices and commercial premises
• Public areas and corridors where wired supply is difficult
• Backup or supplementary detection in larger systems

Key specifications

• Detection principle: photoelectrical (light scattering / reflection)
• Power source: single CR123A battery (replaceable)
• Current drain: 20 mA (operational condition)
• Dimensions: 108 mm diameter × 61 mm height
• Weight: approximately 170 g
• Certifications: EN 54-5 and EN 54-7 (optical smoke detection)
• Mounting: ceiling or wall surface mount

How to use

Install the detector on a ceiling or high on a wall in accordance with local installation rules and the device manual. Insert a fresh CR123A battery following the polarity markings, close the housing, and perform a functional test using the detector’s test procedure to confirm correct operation. Position the detector away from ventilation outlets, windows and areas with frequent steam or dust to reduce the chance of false triggers. Replace the battery as recommended by the manufacturer or when the low-battery indicator is activated.

Usage recommendations

For reliable long-term operation, test the detector regularly (monthly) and replace the battery at the intervals suggested in the manual or sooner if the low-battery signal appears. Keep the sensing chamber free from heavy contamination; if necessary, clean the outer housing and follow the maintenance instructions in the technical documentation.