The Nittan EV-DP (part no. F14-82105) is an analogue addressable dual optical smoke detector for Nittan Evolution fire alarm systems. Like other optical detectors it works on the scattered-light principle, but it uses both an infra-red and a blue LED to measure the particles in its chamber more accurately.
By comparing the readings at the two wavelengths, the EV-DP works out particle size and can tell smoke apart from non-combustion products such as steam and dust. Nittan developed this patented technology to cut false alarms in areas prone to steam and dust, such as hotels, hospitals and other multiple-occupancy buildings.
Key features
- Dual optical technology (IR and blue LED) to reduce false alarms
- Evolution FSK protocol
- EEPROM addressed with a programmer
- Remote indicator (RIL) and base control outputs
- Omniview 360° alarm LED
Technical specifications
- Sensing method: light scatter, 2 x LED
- Operating voltage: 20 to 38 V DC (35 V DC system voltage)
- Quiescent current: 200 µA
- Alarm current (LED on): 5.2 mA
- Remote LED indicator current: 2 mA
- Operating temperature: -10°C to +55°C
- Relative humidity: up to 95% RH, non-condensing
- Ingress protection: IP42
- Material: ABS
- Dimensions: Ø104 x 33 mm (head); Ø104 x 48 mm with UB-6-EV base
- Mass: 118 g (head); 183 g with UB-6-EV base
- Compatible bases include: UB-4, UB-6-EV and STB-4SE-EV
- Standard: EN 54-7:2018
- Manufacturer part number: F14-82105
