Device model: SL-21
Device type: SL-21

SL-21 sirens are designed for visual and acoustic signalling of alarm conditions on 12VDC alarm outputs of MD, MDP, MDD type control modules or WG.NG and AirTECH type detectors.

The sirens have a splash-proof construction, i.e. they can be used both inside and outside buildings.


  • Piezoceramic acoustic transducers;
  • two jumper-adjustable sound levels;
  • light source: high-performance LEDs;
  • extremely high durability and reliability;
  • very low power consumption;
  • independent control of acoustic and visual signalling, 3 terminals;
  • splash-proof housing - for outdoor use.

Technical parameters

Visual signalling
pulsating, red
Information lettering
Acoustic signaling
110 or 103 dB/30cm
Supply voltage
Dimensions (W x H x D)
183 x 310 x 75 mm
Net price
119.00 zł S


Series Technical data Device information sheet Instruction manual Declaration of conformity
od 2016 Download file
od 2009 Download file