Aritech Photoelectric Smoke Detector with c/o relay output

£34.90 +VAT


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SKU: DP721R Category:


DP721R – 700 Series Conventional Optical Smoke Detector w/ Relay Output


The DP721R is an optical smoke detector with field exchangeable optical chamber and a built in potential free relay for local switching applications. The detector detects the presence of smoke in the environment using the Tyndall Effect, by light scarring measurement in an optical chamber.

700 Series detectors continually monitor their own sensitivity and operational status. Once a day they perform a full diagnostic test that includes dynamically testing the sensing chamber and internal electronics. Any abnormal statuses are reported locally and to the panel.

  • Automatic self diagnostics: Dynamic full detector and sensitivity test
  • Manual self diagnostic with visual sensitivity indication
  • Field sensitivity testing without external meters
  • Field exchangeable and disposable optical chamber
  • High false alarm immunity
  • Floating background with drift compensation
  • Separate fire and fault LED
  • 12 – 24 VDC operation
  • Polarity insensitive
  • Full range: optical, heat and optical/heat multi criteria sensor
  • EN54 approved and CPR certified


Operating voltage                      8.5 – 33 VDC
Current consumption                 Quiescent at 24 VDC 100 µA max.
                                               In alarm at 24 VDC 60 mA
Alarm indication                        White LED (red alarm)
Fault indication                         Yellow LED
Remote alarm output                 30 mA
 Relay models                          2 A @ 30 VDC, 1 A @ 120 VAC
Humidity                                  0 – 95%, Non-condensing
IP rating                                   IP43
Operating temperature             -10°C to 60°C
Sensitivity                               10%/m (+1.6%, -3.3%)
Heat specification                    Ambient 25°C
                                             R.O.R. NA
                                             Fixed temp NA
                                             Reset voltage 2.5 V max
                                             Reset time 1 s
                                             Dimensions 10 cm Ø, H = 5 cm

For the detector base please see part [DB702]

Additional information

Weight 0.8 kg


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