DB4B
The DB4B is a high power explosion proof loudspeaker, introduced as a replacement for the DB4 with improved intelligibility and acoustic performance. Certified for use in a wide range of temperatures (from -55ºC to +85ºC)* the Ex enclosure is manufactured from GRP with a rugged thermoplastic flare providing a corrosion free and aesthetically pleasing product.
The frequency response of the unit ensures that critical voice messages and general alarm tones are highly intelligible. The specific SPL figure for sensitivity is 1W @ 1m is 110dB whilst at 1m the 25W unit produces 124dB, the 15W unit 122dB and the 8W unit 119dB.
Options include DC blocking capacitors for monitored systems, resettable fuses for compliance with marine regulations and a swivel bracket that gives the installer greater flexibility when positioning the unit. The short flare option is a worthy addition to the range offering a high SPL and wide dispersion angle in a compact unit.
*Model dependent
| Certification | ATEX, IECEx, cULus, TR CU, CQST, INMETRO, SIL2, DNV, CCOE |
| Flameproof | |
| Area Classification | Zone 1, Zone 2 & non-Ex use. |
| Ambient Operating Temperature | -55°C to +85°C* |
| Ingress Protection | IP66 & IP67 |
| Material |
Ex enclosure - Flame retardant, UV stable Glass Reinforced Polyester Flare - Flame retardant, UV stable thermoplastic polyester |
| Output | 110 dBA at 1W at 1 metre |
| Transformer | 100V line or 8Ω |
| 124 dBA at 25W at 1 metre (long flare IIC version) | |
| Entries | Up to 2 x M20 or 1/2" NPT. Blanking plug available |
| Weight | Ex d - 5kg, Ex de 5.8kg. Based on long flare with transformer |
| Tappings | 25, 12.5, 6, 4, 2, 1 (at 25W) |
| Options |
Power (8W, 15W, 25W), body colour, suitable for Gas or Gas and Dust, Ex atmospheres, Tag & duty labels, entries, capacitor, short flare, Ex e terminal chamber, transformer voltage |
*Model dependent
Features
- Ex d / Ex de IIC / IIIC T4/T5/T6.
- ATEX certified.
- IECEx certified.
- cULus certified
- INMETRO certified
- TR CU certified
- SIL2 certified
- DNV certified
- CCOE certified
- Certified temperature -55ºC to +85ºC.*
- IP66 & IP67.
- Optional Ex e terminal chamber.
- 124dB at 25W, 1m.*
- 8W, 15W & 25W versions.
- Power tappings, via integral transformer.
- Frequency response 350Hz - 8kHz.
- Ex enclosure - Glass reinforced polyester.
- Flare - High impact thermoplastic polyester.
- Stainless steel mounting bracket and cover screws.
- Mounting bracket has ratchet facility as standard.
- Optional swivel bracket available .
*Model dependent
