Eaton’s Crouse-Hinds series MEDC DB4B Loudspeaker range is designed for use in potentially explosive gas and dust atmospheres. Suitable for marine and both onshore and offshore environments in the oil, gas and petrochemical industries.
A high-power, explosion proof loudspeaker, the DB4B was introduced as a replacement for the DB4 with improved intelligibility and acoustic performance.
Certified for use in a wide range of temperatures (from -55°C to +85°C)* the Ex enclosure is manufactured from GRP with a rugged thermoplastic flare ensuring corrosion resistance
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.
This unit is available in a high number of configurations to suit your specification. Please download the datasheet for customization options.
*Model dependent
- Certified temperature -67°F to +158°F, -55°C to +85°C*
- IP66 & IP67/ NEMA 4X & 6
- 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
- Internal earth stud fitted as standard
- Stainless steel mounting bracket and cover screws
- Mounting bracket has ratchet facility as standard
- Optional swivel bracket available
- Optional resettable fuse
* Depending on version
Standard materials
- Ex enclosure – flame retardant, UV stable, glass reinforced polyester (GRP)
- Flare – flame retardant, high impact, UV stable, thermoplastic polyester (UV stability tested to ISO 4892 part 3)
- Bracket, fixings and captive cover screws: 316 stainless steel
Certifications and compliances
ATEX Ex d Gas:
- Cert. no. Baseefa13ATEX0229X.
- Certified to: EN60079-0,1
- Ex II 2G, Ex db IIC T3/T4/T5/T6 Gb
ATEX Ex d Gas & Dust:
- Cert. no. Baseefa13ATEX0231X.
- Certified to: EN60079-0,1,31
- Ex II 2GD, Ex db IIC T3/T4/T5/T6 Gb, Ex tb IIIC T200°C/T135°C/T100°C/T85°C Db,
- IP66 (IP65 short flare)
ATEX Ex de Gas:
- Cert. no. Baseefa13ATEX0232X.
- Certified to: EN60079-0,1,7
- Ex II 2G, Ex db eb IIC T3/T4/T5/T6 Gb
ATEX Ex de Gas & Dust:
- Cert. no. Baseefa13ATEX0233X.
- Certified to: EN60079-0,1,7,31
- Ex II 2GD, Ex db eb IIC T3/T4/T5/T6 Gb, Ex tb IIIC T200°C/T135°C/T100°C/T85°C Db,
- IP66 (IP65 short flare)
IECEx Ex d G:
- Cert. no. IECEx BAS 13.0112X
- Certified to: IEC60079-0,1
- Ex db IIC T3/T4/T5/T6 Gb
IECEx Ex d Gas & Dust:
- Cert. no. IECEx BAS 13.0113X.
- Certified to: IEC60079-0,1,31
- Ex db IIC T3/T4/T5/T6 Gb, Ex tb IIIC T200°C/T135°C/T100°C/T85°C Db,
- IP66 (IP65 short flare)
IECEx Ex de Gas:
- Cert. no. IECEx BAS 13.0114X.
- Certified to: IEC60079-0,1,7
- Ex db eb IIC T3/T4/T5/T6 Gb
IECEx Ex de Gas & Dust:
- Cert. no. IECEx BAS 13.0115X.
- Certified to: EN60079-0,1,7,31
- Ex db eb IIC T3/T4/T5/T6 Gb, Ex tb IIIC T200°C/T135°C/T100°C/T85°C Db,
- IP66 (IP65 short flare)
UL Haz Locs:
- UL certified for USA and Canada, listing no. E203310
- Class I, Div 2. T4/T5/T6, Groups A-D. Class I, Zone 1, Ex d IIC / AEx d IIC Gb
- Class II, Div 1. T135°C/T100°C/T85°C, Groups E,F&G (Canada only*)
- Class II, Div 2. T135°C/T100°C/T85°C, Groups F&G. Zone 21 AEx tb IIIC
- Class III Div 1 *Contact MEDC for ordering details
UL Ord Locs:
- UL certified for USA and Canada, listing no. S8847
TR CU Ex d Gas:
TR CU Ex d Gas & Dust:
- 1Ex d IIC T4/T5/T6 Gb, Ex tb IIIC T135°C/T100°C/T85°C Db
TR CU Ex de Gas 1Ex de IIC T4/T5/T6 Gb
TR CU Ex de Gas & Dust:
- 1Ex de IIC T4/T5/T6 Gb, Ex tb IIIC T135°C/T100°C/T85°C Db
Russian Fire Approval:
- All TR CU certified units are Russian Fire Approved
CQST Ex d Gas:
CQST Ex d Gas & Dust:
- Ex d IIC T3/T4/T5/T6 Gb, ExtD A21 IP6X T200°C/T135°C/T100°C/T85°C/
INMETRO Ex d Gas:
INMETRO Ex d Gas & Dust:
- Ex db eb IIC T3/T4/T5/T6 Gb, Ex tb T200°C/T135°C/T100°C/T85°C Db, IP66 (IP65 short flare)
INMETRO Ex de Gas:
- Ex db eb IIC T3/T4/T5/T6 Gb
INMETRO Ex de Gas & Dust:
- Ex db eb IIC T3/T4/T5/T6 Gb, Ex tb IIIC T200°C/T135°C/T100°C/T85°C Db,
IP66 (IP65 short flare)
SIL:
- SIL 2 certification to IEC61508. Cert number 20151119-4786827453
Type approval:
