D284 Ultraviolet flame detector, 24V
- Highly reliable, long-lasting ultraviolet (UV) receptor tube
- Low power consumption
- Can be mixed with other detector types on the control panel's initiation detection circuit (IDC)
- Easily maintained; can be cleaned without disassembly
The D284's response depends on both the size of the fire and the distance from the fire to the detector; therefore the effective coverage area varies. Very small fires must have a duration of at least 7 sec if within 12 ft (3.7 m) of the detector and a duration of 30 sec if within 12 ft to 25 ft (3.7 m to 7.6 m) of the detector.
| Relative Humidity: | up to 95%, non-condensing at +104°F (+40°C) |
| Temperature (operating): | +14°F to +122°F (-10°C to +50°C) |
| Color: | Ivory |
| Dimensions (diameter x H) | 4 in. x 2 in. (10.2 cm x 5.1 cm) |
| Material: | ACS plastic (acrylonitrile-chlorinated PE-styrene) |
| Contact Rating: | 260 mA at 24 VDC |
| Current | |
| Alarm: | 0.25 mA at 24 VDC |
| Standby: | 0.2 mA at 24 VDC |
| Voltage (operating) | |
| Nominal: | 24 VDC |
| Range: | 17.6 VDC to 27.7 VDC |
| Detection Angle: | 120° conical |
| UV Sensitivity: | 185 nm to 300 nm |