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The NB758 smoke/heat detectors are available in a wide range of variants to suit many applications.
- Dual photoelectric smoke and heat sensors to detect either smoke, heat or a combination of the phenomena.
- Advanced algorithms provide excellent detection discrimination
- Ideal for both fast-flaming and slow smouldering fires.
- High immunity against unwanted alarms
- Stable smoke sensing chamber. No adjustment or replacement required
- Easy installation. No programming required
- Low maintenance .
- Sleek low-profile housing desigrn.
- Surface-mount device (SMD) circuit board design
- Dual LEDs for 360e visibility
- Magnet-initiated alarm test function available with some models
- 4-wire model for DC (9-33) V operation
- 4-wire model include a N/C or N/O alarm relay output
Specifications
| Model | NB758SH-4 |
| Operating voltage | DC (9~33) V |
| Start-up current | ≤170 μA |
| Start-up time | ≤ 60 s |
| Standby current | ≤ 50 μA |
| Alarm current (max) | 40 mA |
| Sampling time | ≤ 5 s |
| Reset voltage | ≤ 1 V |
| Reset time | ≤ 3 s |
| Alarm response threshold (smoke) | ( 1.90 ± 0.76 ) % / foot obscuration |
| Alarm response threshold (heat) | 59°C static temperature and 11.1 °C/min rate-of-rise temperature |
| Alarm relay | SPST. N/O or N/C. 1.0 A@ DC 30 V/0.5 A@ AC 125 V |
| Operating temperature | -10°C ~ +50°C |
| Operating humidity | 0% ~ 95% RH , non – condensing |
| Storage temperature | -25°C ~ +80°C |
| Storage humidity | 0% ~ 98% RH, non – condensing |
| Alarm indicator | Two continuous emitting red LEDs |
| Dimensions (excluding contacts) |
Ø 100 mm x 50 mm |
| Ingress protection rating | IP-43 |
| Ceiling spacing for heat sensor | ≤ 15 m |
*Can transit to higher temperatures for heat sensor operation.
