Description
Key Features
- Responds well to slow burning, smouldering fires
- Well suited for bedrooms and escape routes
- Unaffected by wind or atmospheric pressure
- Flashing LED and magnet-operated test switch option on selected detectors
Product Information
| Product | Part No. |
|---|---|
| Optical Smoke Detector | 55000-317 |
| Optical Smoke Detector with flashing LED | 55000-316 |
| Optical Smoke Detector with magnet test switch & flashing LED | 55000-315 |
Technical Specifications
| Detection principle | Photo-electric detection of light scattered in a forward direction by smoke particles |
|---|---|
| Chamber configuration | Horizontal optical bench housing an infrared emitter and sensor arranged radially |
| Supply voltage | 9 V to 33 V DC |
| Quiescent current | 30 – 50 µA at 24 V |
| Alarm current | 61 mA at 28 V, 52 mA at 24 V, 18 mA at 10 V |
| Alarm indicator | Clear red LED (4 mA) |
| Operating temperature | –20 °C to +60 °C |
| Humidity | 0 % to 95 % RH (no condensation or icing) |
| Dimensions | Ø 100 mm × H 42 mm |
| Weight | 99 g |
| Materials | Housing: White flame-retardant PC; Terminals: Nickel-plated stainless steel |
Operating Principles
Every three seconds the IR-LED emits a 4 kHz burst of collimated light. In clear air the beam misses the photodiode; when smoke enters, light is scattered onto the diode. If two successive pulses exceed the threshold, the detector switches to alarm, increasing supply current to ~75 mA and illuminating the LED. Reset by clearing smoke and interrupting power for ≥1 s.
Environmental Characteristics
- Unaffected by wind or atmospheric pressure
- Temperature range: –20 °C to +60 °C
- Humidity: 0 % to 95 % RH (no condensation or icing)
Compliance & Certification
- EMC Directive 2014/30/EU
- Construction Products Regulation (EU) 305/2011
- ISO 9001:2015, ISO 14001:2015 & LPCB Cert. ref. 010
