Series 65 Optical Smoke Detector

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