YDD-R301 Addressable Rate of Rise Heat Detector (with EOL)


  • Equipped with three states LED status display 
  • Applies binary DIP switch allowing for easy setting of addresses 
  • Alarm indicator x2, without any blind angles.
  • Expandable conventional detector, no external power supply required
  • With independent monitoring indicator ,can clearly indicate detection status
  • Magnetic reed switch test function.
  • Passed CE standard.
  • Dual-wire multi-transmission technology
  • Provided with International Protection Marking IP44 (optional) 
  • Equipped with contacts for remote indicating lamp and relay function (optional) 



Number of Sensitivity Settings

2 Type


  • According to the detection of the thermal components, when the temperature rises rapidly and reaches the pre-fire standard (action temperature), it responds quickly and sends the fire signal 

Activating Temperature

Room Temp: +30℃ within 30seconds

Working Environment

0℃-50℃ Relative humidity of below 95%

Surface-mount Dimensions

ф 114.1 x46.4(H)mm

Ceiling Mount Dimensions

ф 140 x52.6(H)mm,

              installation holeф120mm            

Dust proof/Water proof grade

IP44 waterproof base (optional)

R-type-designated E.O.L

terminal capacitor (not resistor)